CVE-2021-21375

Name of the Vulnerable Software and Affected Versions PJSIP versions 2.10 and earlier

Description PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In PJSIP, after an initial INVITE has been sent, when two 183 responses are received, with the first one causing negotiation failure, a crash will occur. This results in a denial of service.

Recommendations For PJSIP versions 2.10 and earlier, update to a version later than 2.10 to resolve the issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.