mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Bhavin Patel
72 lines
2.6 KiB
YAML
72 lines
2.6 KiB
YAML
name: Web Spring Cloud Function FunctionRouter
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id: 89dddbad-369a-4f8a-ace2-2439218735bc
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version: 2
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date: '2024-05-22'
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author: Michael Haag, Splunk
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status: production
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type: TTP
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description: The following analytic identifies HTTP POST requests to the Spring Cloud
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Function endpoint containing "functionRouter" in the URL. It leverages the Web data
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model to detect these requests based on specific fields such as http_method, url,
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and http_user_agent. This activity is significant because it targets CVE-2022-22963,
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a known vulnerability in Spring Cloud Function, which has multiple proof-of-concept
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exploits available. If confirmed malicious, this activity could allow attackers
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to execute arbitrary code, potentially leading to unauthorized access, data exfiltration,
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or further compromise of the affected system.
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data_source:
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- Splunk Stream HTTP
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search: '| tstats count from datamodel=Web where Web.http_method IN ("POST") Web.url="*/functionRouter*"
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by Web.http_user_agent Web.http_method, Web.url,Web.url_length Web.src, Web.dest
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Web.status sourcetype | `drop_dm_object_name("Web")` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `web_spring_cloud_function_functionrouter_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information
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on Web traffic that include fields relavent for traffic into the `Web` datamodel.
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known_false_positives: False positives may be present with legitimate applications.
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Attempt to filter by dest IP or use Asset groups to restrict to servers.
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references:
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- https://github.com/rapid7/metasploit-framework/pull/16395
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- https://github.com/hktalent/spring-spel-0day-poc
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tags:
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analytic_story:
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- Spring4Shell CVE-2022-22965
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asset_type: Web Server
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confidence: 60
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cve:
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- CVE-2022-22963
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impact: 70
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message: A suspicious URL has been requested against $dest$ by $src$, related to
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a vulnerability in Spring Cloud.
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mitre_attack_id:
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- T1190
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- T1133
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observable:
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- name: dest
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type: Hostname
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role:
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- Victim
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- name: src
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type: IP Address
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role:
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- Attacker
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- Web.http_method
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- Web.url
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- Web.url_length
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- Web.src
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- Web.dest
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- Web.http_user_agent
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risk_score: 42
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security_domain: network
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tests:
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- name: True Positive Test
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attack_data:
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- data:
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https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1190/spring4shell/all_functionrouter_http_streams.log
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source: stream:http
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sourcetype: stream:http
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