CVE-2021-21841

NameCVE-2021-21841
DescriptionAn exploitable integer overflow vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. A specially crafted MPEG-4 input when reading an atom using the 'sbgp' FOURCC code can cause an integer overflow due to unchecked arithmetic resulting in a heap-based buffer overflow that causes memory corruption. An attacker can convince a user to open a video to trigger this vulnerability.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-4966-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gpac (PTS)stretch0.5.2-426-gc5ad4e4+dfsg5-3+deb9u1fixed
buster0.5.2-426-gc5ad4e4+dfsg5-5fixed
bullseye1.0.1+dfsg1-4vulnerable
bullseye (security)1.0.1+dfsg1-4+deb11u1fixed
bookworm, sid1.0.1+dfsg1-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gpacsourcestretch(not affected)
gpacsourcebuster(not affected)
gpacsourcebullseye1.0.1+dfsg1-4+deb11u1DSA-4966-1
gpacsource(unstable)1.0.1+dfsg1-5

Notes

[buster] - gpac <not-affected> (Vulnerable code not present)
[stretch] - gpac <not-affected> (Vulnerable code not present)
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297
https://github.com/gpac/gpac/commit/b515fd04f5f00f4a99df741042f1efb31ad56351
https://github.com/gpac/gpac/issues/1814

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