Vulnerability Analysissipsession-initiation-protocolfuzzingsecurity-testingrobustness

Protos-SIP

SIP test suite designed to evaluate implementation level security and robustness of Session Initiation Protocol (SIP) implementations.

Description

The protos-sip tool provides a comprehensive test suite specifically developed to assess the security and robustness of SIP implementations at the implementation level. SIP (Session Initiation Protocol) is widely used for initiating, maintaining, and terminating real-time sessions that include voice, video, and messaging applications.

This tool is particularly valuable for developers, security researchers, and network administrators who need to validate the resilience of their SIP servers and clients against malformed messages, unexpected inputs, and potential attack vectors. By simulating various test cases, protos-sip helps identify vulnerabilities that could lead to denial-of-service conditions, crashes, or other security issues in SIP deployments.

The test suite operates by generating and sending SIP requests to target implementations, systematically testing different aspects of the protocol handling. It requires Java runtime environment and is easily installed via Kali Linux package manager.

How It Works

Protos-sip is a Java-based test suite that generates and transmits SIP requests to target implementations using specified parameters like recipient URI, sender URI, domain routing, and call IDs. The tool constructs SIP messages according to test cases designed to probe protocol handling, parsing, and response mechanisms. It evaluates how the target implementation processes various message formats, headers, and payloads, identifying weaknesses in robustness and security through crash analysis, response anomalies, or service disruptions.

Installation

bash
sudo apt install protos-sip

Flags

-touri <addr>Recipient of the request. Example: [email protected]
-fromuri <addr>Initiator of the request. Default: user@kali
-sendto <domain>Send packets to <domain> instead of domainname of -turi
-callid <callid>Call id to start test-case call ids from. Default: 0

Examples

Run SIP test suite against target SIP URI
java -jar protos-sip.jar -touri sip:[email protected]
Test with custom from URI instead of default user@kali
java -jar protos-sip.jar -touri sip:[email protected] -fromuri sip:tester@example.com
Route packets to specific domain instead of touri domain
java -jar protos-sip.jar -touri sip:[email protected] -sendto example.net
Start test cases from specific call ID
java -jar protos-sip.jar -touri sip:[email protected] -callid 100
Display help and usage information
protos-sip -h
Comprehensive test with custom from URI and sendto domain
java -jar protos-sip.jar -touri sip:[email protected] -fromuri sip:attacker@evil.com -sendto target.net
Updated 2026-04-16kali.org ↗