First published: Wed Aug 25 2021(Updated: )
An 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 can cause an integer overflow when the library encounters an atom using the “tfra” FOURCC code 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.
Credit: talos-cna@cisco.com
Affected Software | Affected Version | How to fix |
---|---|---|
debian/gpac | 0.5.2-426-gc5ad4e4+dfsg5-5 1.0.1+dfsg1-4+deb11u3 2.2.1+dfsg1-3 | |
GPAC MP4Box | =1.0.1 | |
Debian | =10.0 | |
Debian | =11.0 |
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CVE-2021-21849 has been classified as a high-severity vulnerability due to the risk of exploitation through specially crafted MPEG-4 files.
The vulnerability is caused by an integer overflow in the MPEG-4 decoding functionality within the GPAC Project's Advanced Content library.
To fix CVE-2021-21849, update the GPAC library to version 0.5.2-426-gc5ad4e4+dfsg5-5 or later.
GPAC version 1.0.1 and earlier versions are affected by CVE-2021-21849.
There are no known effective workarounds for CVE-2021-21849, so updating is essential.