Asterisk Security Vulnerabilities

Asterisk is a software for PBX systems that runs on Linux and supports IP calls using SIP, IAX, and H323 protocols. A security vulnerability exists in Asterisk versions prior to 18.20.1, prior to 20.5.1, and prior to 21.0.1, and prior to Certified-asterisk 18.9-cert6, which stems from a contentio...