mcp-server-semgrep/semgrep-rules/csharp/lang/security/cryptography/unsigned-security-token.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: unsigned-security-token
  patterns:
  - pattern: RequireSignedTokens = false
  - pattern-inside: |
      new TokenValidationParameters {
        ...
      }
  fix: RequireSignedTokens = true
  message: Accepting unsigned security tokens as valid security tokens allows an attacker to remove its
    signature and potentially forge an identity. As a fix, set RequireSignedTokens to be true.
  metadata:
    category: security
    technology:
    - csharp
    owasp:
    - A02:2021 - Cryptographic Failures
    cwe:
    - 'CWE-347: Improper Verification of Cryptographic Signature'
    references:
    - https://owasp.org/Top10/A01_2021-Broken_Access_Control/
    - https://owasp.org/Top10/A02_2021-Cryptographic_Failures/
    - https://cwe.mitre.org/data/definitions/347
    subcategory:
    - vuln
    likelihood: MEDIUM
    impact: MEDIUM
    confidence: MEDIUM
  languages:
  - csharp
  severity: ERROR