CVE-2021-21375

MEDIUM 6.5CVE-2021-21375 · Published 10/03/2021 · updated 17/06/2026

In short

CVE-2021-21375 is a MEDIUM (CVSS 6.5) vulnerability affecting pjsip (teluu).
Chance of exploitation in the next 30 days (EPSS): 2.1%, higher than 81.5% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
pjsip teluu	`≤ 2.10`	No fix yet

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.

References

pjsip/pjproject commit 97b3d7a · Patch
pjsip/pjproject security advisory · Exploit
lists.debian.org/debian-lts-announce/2021/04/msg00023.html · Mailing List
lists.debian.org/debian-lts-announce/2021/05/msg00020.html · Mailing List
security.gentoo.org/glsa/202107-42 · Third Party Advisory

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Package

Affected versions

Patched versions

pjsip

teluu

≤ 2.10

No fix yet

Description

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