CVE-2021-21375 Information

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 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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

https://github.com/pjsip/pjproject/commit/97b3d7addbaa720b7ddb0af9bf6f3e443e664365 https://github.com/pjsip/pjproject/security/advisories/GHSA-hvq6-f89p-frvp https://lists.debian.org/debian-lts-announce/2021/04/msg00023.html https://lists.debian.org/debian-lts-announce/2021/05/msg00020.html https://security.gentoo.org/glsa/202107-42

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5