CVE-2021-21375

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 version 2.10 and earlier, 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.

• CWE-400
• CWE-754

• https://github.com/pjsip/pjproject/commit/97b3d7addbaa720b7ddb0af9bf6f3e443e664365Patch, Third Party Advisory
• https://github.com/pjsip/pjproject/security/advisories/GHSA-hvq6-f89p-frvpExploit, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/04/msg00023.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/05/msg00020.htmlMailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202107-42Third Party Advisory
• https://github.com/pjsip/pjproject/commit/97b3d7addbaa720b7ddb0af9bf6f3e443e664365Patch, Third Party Advisory
• https://github.com/pjsip/pjproject/security/advisories/GHSA-hvq6-f89p-frvpExploit, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/04/msg00023.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/05/msg00020.htmlMailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202107-42Third Party Advisory

Published

Mar 10, 2021

Last Modified

Jun 17, 2026

Status

Modified

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