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Vulnerability DatabaseCVE-2021-40559

CVE-2021-40559: 
NixOS vulnerability analysis and mitigation

Overview

A null pointer deference vulnerability exists in gpac through 1.0.1 via the naludmxparsenalavc function in reframenalu, which allows a denial of service (NIST NVD, Debian Advisory). The vulnerability was discovered in August 2021 and affects the MP4Box component of GPAC.

Technical details

The vulnerability exists in the naludmxparsenalavc function within reframenalu.c at line 2474. When processing certain malformed input files, the function attempts to dereference a null pointer, which leads to a segmentation fault. The vulnerability has a CVSS v3.1 Base Score of 5.5 MEDIUM (Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) (NIST NVD).

Impact

The vulnerability allows an attacker to cause a denial of service condition by triggering a segmentation fault through a null pointer dereference. This can result in the application crashing when processing specially crafted input files (NIST NVD).

Mitigation and workarounds

The vulnerability has been fixed in Debian's gpac package version 1.0.1+dfsg1-4+deb11u2 for the stable distribution (bullseye). Users are recommended to upgrade their gpac packages to the patched version (Debian Advisory).

Additional resources

Source: This report was generated using AI

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