SIP Interactive Attack Flows

Step-by-step visualization of SIP attack scenarios and their progression through VoIP systems

Attack Visualization

Attack Chains

Security Scenarios

Threat Modeling

SIP Attack Flow Overview

Understanding how SIP attacks progress from initial reconnaissance to full exploitation is crucial for developing effective security controls. These interactive attack flows provide a detailed view of common attack scenarios, showing the step-by-step progression and technical details of each phase.

Each attack flow represents a realistic scenario that security professionals might encounter when testing or defending SIP-based VoIP systems. The flows highlight critical decision points, technical requirements, and security implications at each stage.

Using Attack Flows for Security

Threat Modeling: Use these flows to identify potential attack paths in your SIP infrastructure
Security Testing: Follow the flows as a roadmap for comprehensive security assessments
Defense Planning: Identify critical control points to implement security measures
Incident Response: Understand attack progression to improve detection and response

Attack Flow Components

Understanding the visualization elements

Attack Phases

Sequential stages of the attack progression

Technical Details

Specific techniques and tools used at each stage

Security Implications

Impact and consequences of each attack phase

Mitigation Points

Critical control points for implementing defenses

SIP Man-in-the-Middle Attack Flow

Step-by-step flow of a SIP man-in-the-middle attack to intercept VoIP communications

Critical Risk

SIP Man-in-the-Middle Attack Flow Diagram

Step 1: Network Positioning

Attacker positions themselves in the network path between SIP endpoints or between endpoint and proxy.

Technical Details

Using ARP poisoning, DNS spoofing, or compromised network equipment to intercept traffic.

Security Implications

Network-level security controls are critical for preventing MITM positioning.

Mitigation Strategies

Implement TLS for all SIP signaling to prevent message interception and tampering
Use SRTP (Secure RTP) for media encryption, preventing eavesdropping
Apply ZRTP or similar key exchange for end-to-end media encryption
Implement SIP Identity (RFC 8224) to verify message integrity
Deploy network segmentation and proper access controls

Key Insights

The attack exploits the separation between SIP signaling and RTP media paths, highlighting the importance of securing both channels independently.

SIP Attack Simulation

Interactive simulation of a SIP attack scenario showing message flows and attack progression

SIP Attack Flow Comparison

Attack Scenario	Initial Access	Exploitation Method	Impact	Detection Difficulty
Man-in-the-Middle	Network positioning	SDP manipulation	Call eavesdropping	High
Registration Hijacking	SIP server access	Authentication bypass	Call redirection	Medium
SIP Flood	Network access	Traffic generation	Service disruption	Low
Toll Fraud	Compromised extension	Unauthorized calling	Financial loss	Medium