Protocol Analysis

Detection Workflow

1. Identify protocol handlers: Find network socket handlers, locate packet parsing functions, identify protocol state machines, map protocol message types
2. Analyze protocol messages: Identify message formats, parse message fields, check field validation, assess length handling
3. Trace protocol state: Map state transitions, identify state variables, check state machine completeness, assess state corruption potential
4. Assess security: Check authentication and authorization, verify input validation, assess exploitability, identify protocol-level attacks

Key Patterns

• Protocol parsing vulnerabilities: buffer overflows in packet parsing, integer overflow in length fields, format string in protocol handling, command injection in protocol commands
• State machine issues: out-of-order message handling, missing state transitions, state corruption attacks, protocol state confusion
• Authentication flaws: weak authentication mechanisms, missing authentication on critical operations, authentication bypass opportunities, session management issues
• Protocol logic errors: race conditions in protocol handling, TOCTOU in protocol operations, improper input validation, protocol downgrade attacks

Output Format

Report with: id, type, subtype, severity, confidence, location, protocol, vulnerability, packet_field (name, offset, size), overflow_scenario, attack_vector, exploitable, impact, mitigation.

Severity Guidelines

• CRITICAL: Remote code execution via protocol vulnerability
• HIGH: Remote DoS or information disclosure
• MEDIUM: Local protocol issues
• LOW: Minor protocol bugs

See Also

• patterns.md

  - Detailed detection patterns and exploitation scenarios

• examples.md

  - Example analysis cases and code samples

• references.md

  - CWE references and mitigation strategies