mcp-server-semgrep/semgrep-rules/rust/lang/security/rustls-dangerous.yml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
  - id: rustls-dangerous
    message: Dangerous client config used, ensure SSL verification
    pattern-either:
      - pattern: "rustls::client::DangerousClientConfig"
      - pattern: "$CLIENT.dangerous().set_certificate_verifier(...)"
      - pattern: |
          let $CLIENT = rustls::client::ClientConfig::dangerous(...);
          ...
          $CLIENT.set_certificate_verifier(...);
    metadata:
      references:
        - https://docs.rs/rustls/latest/rustls/client/struct.DangerousClientConfig.html
        - https://docs.rs/rustls/latest/rustls/client/struct.ClientConfig.html#method.dangerous
      technology:
        - rustls
      category: security
      cwe: "CWE-295: Improper Certificate Validation"
      confidence: HIGH
      likelihood: LOW
      impact: MEDIUM
      subcategory: vuln
    languages: [rust]
    severity: WARNING