Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2021-40566
CVE-2021-40566:
NixOS vulnerability analysis and mitigation
Overview
CVE-2021-40566 is a heap use-after-free vulnerability discovered in Gpac through version 1.0.1. The vulnerability exists in the mpgviddmxprocess function within the reframempgvid.c file when using mp4box, which can lead to a segmentation fault (MITRE CVE, Debian Tracker).
Technical details
The vulnerability occurs due to the program not checking the nullity of a pointer before performing memory operations in the mpgviddmxprocess function. This results in a heap use-after-free condition that can trigger a segmentation fault. The issue was identified in the source file reframempgvid.c at line 851 (GitHub Issue).
Impact
When exploited, this vulnerability results in a denial of service condition through a segmentation fault, affecting the stability and availability of applications using the Gpac framework (MITRE CVE).
Mitigation and workarounds
The vulnerability has been fixed in version 1.0.1+dfsg1-4+deb11u2 for Debian's stable distribution. Users are recommended to upgrade their gpac packages to the latest version. The fix involves proper pointer validation before memory operations (Debian Security, GitHub Commit).
Additional resources
Source: This report was generated using AI
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