voip-sip-attack

To enumerate valid SIP extensions during a VoIP security assessment, you identify SIP endpoints and map valid extensions using tools like svwar against authorized VoIP infrastructure on UDP ports 5060 or 5061. This process reveals active extension numbers for further testing.

The best way to test weak authentication on SIP devices is by applying credential testing tools like svcrack or sipsak against identified extensions. This verifies password strength and exposes potential unauthorized access vectors within the authorized SIP infrastructure.

Yes, you can assess VLAN hopping vulnerabilities in a VoIP network by evaluating voice VLAN segmentation using tools like voiphopper. This tests whether an attacker can bypass network segmentation to access the voice VLAN and intercept sensitive signaling or media traffic.

SIP and RTP flood attacks test VoIP infrastructure resilience by generating high volumes of signaling or media traffic using tools like inviteflood, rtpflood, and iaxflood. This evaluates the network's capacity to withstand Denial of Service conditions and maintain service availability.

Yes, explicit authorization is strictly required to perform SIP eavesdropping, device discovery, and any network-level penetration testing. You must have approved access to the VoIP infrastructure, including SIP and RTP port ranges, before conducting security assessments.

Testing SIP vulnerabilities requires access to specific UDP ports because SIP signaling typically operates on ports 5060 and 5061, IAX2 on 4569, and RTP media streams use ranges like 10000-20000. Access to these ports enables device discovery and traffic interception.