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security_socket_accept

NAME

security_socket_accept - security check for socket accept operations

DESCRIPTION

Triggered when a socket attempts to accept an incoming connection. This LSM (Linux Security Module) hook event captures the security check performed before a connection is accepted, providing visibility into network connection establishment.

The event provides information about the accepting socket and the local address details of the accepted connection. This visibility is crucial for security monitoring and network behavior analysis, as it helps identify potential threats or irregular connection patterns.

EVENT SETS

none

DATA FIELDS

sockfd (int32) : The file descriptor of the socket accepting the connection

local_addr (trace.SockAddr) : Structure containing the local address details of the accepted connection

DEPENDENCIES

LSM Hook:

  • security_socket_accept (required): LSM hook for socket accept security checks

USE CASES

  • Security monitoring: Track incoming connection patterns

  • Service auditing: Monitor network service activity

  • Access control: Verify connection acceptance permissions

  • Network diagnostics: Troubleshoot connection issues

  • Behavior analysis: Understand service connection patterns

CONNECTION STATES

Important connection acceptance states:

  • Pre-acceptance: Initial security check phase
  • Acceptance: Connection establishment
  • Post-acceptance: New socket creation
  • Error states: Failed acceptance scenarios

SECURITY IMPLICATIONS

Critical security aspects to monitor:

  • Unauthorized access: Unexpected connection attempts
  • Service abuse: Connection flooding or DoS attempts
  • Protocol violations: Invalid connection patterns
  • Resource exhaustion: Connection queue flooding
  • Access control bypass: Unauthorized service access

PERFORMANCE CONSIDERATIONS

Connection acceptance impact:

  • Backlog management: Connection queue handling
  • Resource allocation: Socket descriptor usage
  • Processing overhead: Security check costs
  • Queue limits: Maximum pending connections
  • security_socket_create: Socket creation security events
  • security_socket_listen: Socket listen security events
  • security_socket_connect: Socket connect security events
  • security_socket_bind: Socket bind security events
  • security_socket_setsockopt: Socket option security events