CVE-2021-43845

NameCVE-2021-43845
DescriptionPJSIP is a free and open source multimedia communication library. In version 2.11.1 and prior, if incoming RTCP XR message contain block, the data field is not checked against the received packet size, potentially resulting in an out-of-bound read access. This affects all users that use PJMEDIA and RTCP XR. A malicious actor can send a RTCP XR message with an invalid packet size.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2962-1, DLA-3194-1, DLA-3549-1, DLA-3887-1, DSA-5285-1
Debian Bugs1014998

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
asterisk (PTS)bullseye1:16.28.0~dfsg-0+deb11u4fixed
bullseye (security)1:16.28.0~dfsg-0+deb11u5fixed
sid1:22.1.0~dfsg+~cs6.14.60671435-1fixed
ring (PTS)bullseye20210112.2.b757bac~ds1-1vulnerable
bullseye (security)20210112.2.b757bac~ds1-1+deb11u1fixed
bookworm20230206.0~ds2-1.1fixed
sid20231201.0~ds1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
asterisksourcestretch(not affected)
asterisksourcebuster1:16.28.0~dfsg-0+deb10u1DLA-3194-1
asterisksourcebullseye1:16.28.0~dfsg-0+deb11u1DSA-5285-1
asterisksource(unstable)1:18.12.0~dfsg+~cs6.12.40431413-1
pjprojectsourcestretch2.5.5~dfsg-6+deb9u3DLA-2962-1
pjprojectsource(unstable)(unfixed)
ringsourcebuster20190215.1.f152c98~ds1-1+deb10u2DLA-3549-1
ringsourcebullseye20210112.2.b757bac~ds1-1+deb11u1DLA-3887-1
ringsource(unstable)20230206.0~ds1-11014998

Notes

[stretch] - asterisk <not-affected> (Vulnerable code not present)
https://github.com/pjsip/pjproject/security/advisories/GHSA-r374-qrwv-86hh
https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859
https://github.com/pjsip/pjproject/pull/2924

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