mirror of
https://github.com/volatilityfoundation/volatility
synced 2026-06-08 18:04:46 +00:00
Andrew Case
76 lines
2.8 KiB
Python
76 lines
2.8 KiB
Python
# Volatility
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# Copyright (C) 2007-2013 Volatility Foundation
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#
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# This file is part of Volatility.
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#
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# Volatility is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License Version 2 as
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# published by the Free Software Foundation. You may not use, modify or
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# distribute this program under any other version of the GNU General
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# Public License.
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#
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# Volatility 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 Volatility. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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@author: Andrew Case
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@license: GNU General Public License 2.0
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@contact: atcuno@gmail.com
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@organization:
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"""
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import volatility.obj as obj
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import volatility.debug as debug
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import volatility.plugins.linux.common as linux_common
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import volatility.plugins.linux.lsmod as linux_lsmod
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class linux_netfilter(linux_common.AbstractLinuxCommand):
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"""Lists Netfilter hooks"""
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def calculate(self):
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linux_common.set_plugin_members(self)
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hook_names = ["PRE_ROUTING", "LOCAL_IN", "FORWARD", "LOCAL_OUT", "POST_ROUTING"]
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proto_names = ["", "", "IPV4", "", "", "", "", "", "", "", "" , "", "", ""]
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# struct list_head nf_hooks[NFPROTO_NUMPROTO][NF_MAX_HOOKS]
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# NFPROTO_NUMPROTO = 12
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# NF_MAX_HOOKS = 7
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nf_hooks_addr = self.addr_space.profile.get_symbol("nf_hooks")
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if nf_hooks_addr == None:
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debug.error("Unable to analyze NetFilter. It is either disabled or compiled as a module.")
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modules = linux_lsmod.linux_lsmod(self._config).get_modules()
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list_head_size = self.addr_space.profile.get_obj_size("list_head")
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for outer in range(13):
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arr = nf_hooks_addr + (outer * (list_head_size * 8))
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for inner in range(7):
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list_head = obj.Object("list_head", offset = arr + (inner * list_head_size), vm = self.addr_space)
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for hook_ops in list_head.list_of_type("nf_hook_ops", "list"):
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if self.is_known_address(hook_ops.hook.v(), modules):
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hooked = "False"
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else:
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hooked = "True"
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yield proto_names[outer], hook_names[inner], hook_ops.hook.v(), hooked
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def render_text(self, outfd, data):
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self.table_header(outfd, [("Proto", "5"), ("Hook", "16"), ("Handler", "[addrpad]"), ("Is Hooked", "5")])
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for outer, inner, hook_addr, hooked in data:
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self.table_row(outfd, outer, inner, hook_addr, hooked)
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