Qlik Sense Enterprise - HTTP Request Smuggling

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

criticalseverity

9.9CVSS score

88.2%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

An HTTP Request Tunneling 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 a remote attacker to elevate their privilege by tunneling HTTP requests in the raw HTTP request. This allows them to send requests that get executed by the backend server hosting the repository application. 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

Authenticated attackers with low privileges can exploit HTTP request tunneling to escalate privileges and execute malicious requests on the Qlik Sense repository application backend server.

Fix

Update Qlik Sense Enterprise for Windows to August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, or August 2022 Patch 13 that fixes HTTP request smuggling in the repository application.

How to confirm it

Send: GET /resources/qmc/fonts/CVE-2023-41265.ttf
Positive when: status_code == 400 and contains(to_lower(set_cookie), 'x-qlik-session') and contains(header, 'Bad Request')

Run it with nuclei: nuclei -id CVE-2023-41265 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2023-41265

info:
  name: Qlik Sense Enterprise - HTTP Request Smuggling
  author: AdamCrosser
  severity: critical
  description: |
    An HTTP Request Tunneling 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 a remote attacker to elevate their privilege by tunneling HTTP requests in the raw HTTP request. This allows them to send requests that get executed by the backend server hosting the repository application. 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: |
    Authenticated attackers with low privileges can exploit HTTP request tunneling to escalate privileges and execute malicious requests on the Qlik Sense repository application backend server.
  remediation: |
    Update Qlik Sense Enterprise for Windows to August 2023 IR, May 2023 Patch 4, February 2023 Patch 8, November 2022 Patch 11, or August 2022 Patch 13 that fixes HTTP request smuggling in the repository application.
  reference:
    - https://www.praetorian.com/blog/doubleqlik-bypassing-the-original-fix-for-cve-2023-41265/
    - https://www.praetorian.com/blog/qlik-sense-technical-exploit
    - https://www.praetorian.com/blog/advisory-qlik-sense/
    - https://community.qlik.com/t5/Release-Notes/tkb-p/ReleaseNotes
    - https://community.qlik.com/t5/Official-Support-Articles/Critical-Security-fixes-for-Qlik-Sense-Enterprise-for-Windows/ta-p/2110801
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 9.9
    cve-id: CVE-2023-41265
    cwe-id: CWE-444
    epss-score: 0.88215
    epss-percentile: 0.9977
    cpe: cpe:2.3:a:qlik:qlik_sense:august_2022:-:*:*:enterprise:windows:*:*
  metadata:
    max-request: 1
    vendor: qlik
    product: qlik_sense
    framework: windows
    shodan-query:
      - html:"Qlik"
      - 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,kev,qlik,smuggling,windows,vkev,vuln

http:
  - raw:
      - |+
        GET /resources/qmc/fonts/CVE-2023-41265.ttf HTTP/1.1
        Host: {{Hostname}}
        Cookie: X-Qlik-Session=13333333-3333-3333-3333-333333333337
        Content-Type: text/html
        Content-Length: 5
        Transfer-Encoding: chunked

        ;

    unsafe: true
    matchers:
      - type: dsl
        dsl:
          - status_code == 400
          - contains(to_lower(set_cookie), 'x-qlik-session')
          - contains(header, 'Bad Request')
        condition: and

References

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