mcp-server-semgrep/semgrep-rules/go/lang/security/audit/dangerous-command-write.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: dangerous-command-write
  patterns:
  - pattern: |
      $CW.Write($BYTE)
  - pattern-inside: |
      $CW,$ERR := $CMD.StdinPipe()
      ...
  - pattern-not: |
      $CW.Write("...")
  - pattern-not: |
      $CW.Write([]byte("..."))
  - pattern-not: |
      $CW.Write([]byte("..."+"..."))
  - pattern-not-inside: |
      $BYTE = []byte("...");
      ...
  - pattern-not-inside: |
      $BYTE = []byte("..."+"...");
      ...
  - pattern-inside: |
      import "os/exec"
      ...
  message: >-
    Detected non-static command inside Write. Audit the input to '$CW.Write'.
    If unverified user data can reach this call site, this is a code injection
    vulnerability. A malicious actor can inject a malicious script to execute
    arbitrary code.
  severity: ERROR
  languages: [go]
  metadata:
    cwe:
    - "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"
    category: security
    technology:
    - go
    confidence: LOW
    owasp:
    - A01:2017 - Injection
    - A03:2021 - Injection
    references:
    - https://owasp.org/Top10/A03_2021-Injection
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: HIGH