GLPI 9.2/<9.5.6 - Information Disclosure

mediumseverity

5.3CVSS score

4.5%likelihood of exploitation, next 30 days

92%of all CVEs are less likely

Readycheck to confirm it

GLPI 9.2 and prior to 9.5.6 is susceptible to information disclosure via the telemetry endpoint, which discloses GLPI and server information. An attacker can possibly obtain sensitive information, modify data, and/or execute unauthorized operations.

Impact

Information disclosure vulnerability in GLPI versions 9.2 to <9.5.6 allows an attacker to access sensitive information.

Fix

This issue is fixed in version 9.5.6. As a workaround, remove the file ajax/telemetry.php, which is not needed for usual GLPI functions.

How to confirm it

Send: GET {{BaseURL}}/ajax/telemetry.php ; GET {{BaseURL}}/glpi/ajax/telemetry.php
Positive when: contains "\"uuid\":" and "\"glpi\":" AND status 200

Run it with nuclei: nuclei -id CVE-2021-39211 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-39211

info:
  name: GLPI 9.2/<9.5.6 - Information Disclosure
  author: dogasantos,noraj
  severity: medium
  description: GLPI 9.2 and prior to 9.5.6 is susceptible to information disclosure via the telemetry endpoint, which discloses GLPI and server information. An attacker can possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    Information disclosure vulnerability in GLPI versions 9.2 to <9.5.6 allows an attacker to access sensitive information.
  remediation: This issue is fixed in version 9.5.6. As a workaround, remove the file ajax/telemetry.php, which is not needed for usual GLPI functions.
  reference:
    - https://github.com/glpi-project/glpi/security/advisories/GHSA-xx66-v3g5-w825
    - https://github.com/glpi-project/glpi/releases/tag/9.5.6
    - https://nvd.nist.gov/vuln/detail/CVE-2021-39211
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/StarCrossPortal/scalpel
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2021-39211
    cwe-id: CWE-200,NVD-CWE-noinfo
    epss-score: 0.04516
    epss-percentile: 0.91603
    cpe: cpe:2.3:a:glpi-project:glpi:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: glpi-project
    product: glpi
    shodan-query:
      - http.title:"glpi"
      - http.favicon.hash:"-1474875778"
    fofa-query:
      - icon_hash="-1474875778"
      - title="glpi"
    google-query: intitle:"glpi"
  tags: cve,cve2021,glpi,exposure,glpi-project,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/ajax/telemetry.php"
      - "{{BaseURL}}/glpi/ajax/telemetry.php"

    matchers-condition: and
    matchers:
      - type: word
        words:
          - '"uuid":'
          - '"glpi":'
        condition: and

      - type: status
        status:
          - 200

References

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