mcp-server-semgrep/semgrep-rules/generic/ci/security/bash-reverse-shell.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: bash_reverse_shell
  metadata:
    cwe:
    - "CWE-94: Improper Control of Generation of Code ('Code Injection')"
    category: security
    technology:
    - ci
    confidence: HIGH
    owasp:
    - A03:2021 - Injection
    references:
    - https://owasp.org/Top10/A03_2021-Injection
    cwe2022-top25: true
    subcategory:
    - audit
    likelihood: MEDIUM
    impact: HIGH
  message: Semgrep found a bash reverse shell
  severity: ERROR
  languages:
  - generic
  pattern-either:
  - pattern: |
      sh -i >& /dev/udp/.../... 0>&1
  - pattern: |
      <...>/dev/tcp/.../...; sh <&... >&... 2>&
  - pattern: |
      <...>/dev/tcp/.../...; cat <&... | while read line; do $line 2>&... >&...;done
  - pattern: |
      sh -i ...<...> /dev/tcp/.../... ...<&... 1>&... 2>&