CVE-2021-21848: Buffer Overflow
An exploitable integer overflow vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. The library will actually reuse the parser for atoms with the “stsz” FOURCC code when parsing atoms that use the “stz2” FOURCC code and 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2021-21848?
CVE-2021-21848 has been classified as a critical severity vulnerability due to its potential for exploitation leading to arbitrary code execution.
How do I fix CVE-2021-21848?
To fix CVE-2021-21848, update GPAC to version 0.5.2-426-gc5ad4e4+dfsg5-5 or later, or apply any available patches.
Which software versions are affected by CVE-2021-21848?
CVE-2021-21848 affects GPAC version 1.0.1 as well as specific versions of Debian Linux including Debian 10.0 and 11.0.
What types of issues does CVE-2021-21848 cause?
CVE-2021-21848 can lead to integer overflow, which may result in memory corruption and allow attackers to execute arbitrary code.
Is CVE-2021-21848 a widespread vulnerability?
CVE-2021-21848 is particularly relevant to users of the GPAC library, especially in environments that handle MPEG-4 content.