CVE-2021-21375

NameCVE-2021-21375
DescriptionPJSIP 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2636-1, DLA-2665-1
Debian Bugs986815

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ring (PTS)buster20190215.1.f152c98~ds1-1+deb10u1fixed
bullseye20210112.2.b757bac~ds1-1fixed
sid20210112.2.b757bac~ds1-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pjprojectsourcestretch2.5.5~dfsg-6+deb9u2DLA-2636-1
pjprojectsource(unstable)(unfixed)
ringsourcestretch20161221.2.7bd7d91~dfsg1-1+deb9u1DLA-2665-1
ringsourcebuster20190215.1.f152c98~ds1-1+deb10u1
ringsource(unstable)20210112.2.b757bac~ds1-1986815

Notes

https://github.com/pjsip/pjproject/security/advisories/GHSA-hvq6-f89p-frvp
https://github.com/pjsip/pjproject/commit/97b3d7addbaa720b7ddb0af9bf6f3e443e664365

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