CVE-2021-20031: SonicWall SonicOS 7.0 - Open Redirect

id: CVE-2021-20031

info:
  name: SonicWall SonicOS 7.0 - Open Redirect
  author: gy741
  severity: medium
  description: SonicWall SonicOS 7.0 contains an open redirect vulnerability. The values of the Host headers are implicitly set as trusted. An attacker can spoof a particular host header, allowing the attacker to render arbitrary links, obtain sensitive information, modify data, execute unauthorized operations. and/or possibly redirect a user to a malicious site.
  remediation: |
    Apply the latest security patch or update provided by SonicWall to mitigate the vulnerability.
  reference:
    - https://www.exploit-db.com/exploits/50414
    - https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0019
    - http://packetstormsecurity.com/files/164502/Sonicwall-SonicOS-7.0-Host-Header-Injection.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-20031
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2021-20031
    cwe-id: CWE-601
    epss-score: 0.41298
    epss-percentile: 0.97317
    cpe: cpe:2.3:h:sonicwall:nsa_2650:-:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: sonicwall
    product: nsa_2650
    google-query: inurl:"auth.html" intitle:"SonicWall"
  tags: cve,cve2021,sonicwall,redirect,edb,packetstorm

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{randstr}}.tld

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'https://{{randstr}}.tld/auth.html'
          - 'Please be patient as you are being re-directed'
        condition: and

      - type: status
        status:
          - 200
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