CVE-2019-20630 : What You Need to Know

A problem was found in libgpac.a in GPAC versions prior to 0.8.0, specifically within MP4Box. This issue involves a heap-based buffer over-read in BS_ReadByte (called from gf_bs_read_bit) located in utils/bitstream.c. This vulnerability can be exploited through a specially crafted MP4 file, resulting in a denial of service.

Understanding CVE-2019-20630

An issue was discovered in libgpac.a in GPAC before 0.8.0, as demonstrated by MP4Box. It contains a heap-based buffer over-read in BS_ReadByte (called from gf_bs_read_bit) in utils/bitstream.c that can cause a denial of service via a crafted MP4 file.

What is CVE-2019-20630?

CVE-2019-20630 is a vulnerability in GPAC versions prior to 0.8.0, specifically within MP4Box, that allows for a denial of service attack through a specially crafted MP4 file.

The Impact of CVE-2019-20630

This vulnerability can be exploited by an attacker to cause a denial of service on systems running affected versions of GPAC.

Technical Details of CVE-2019-20630

Vulnerability Description

The vulnerability involves a heap-based buffer over-read in BS_ReadByte (called from gf_bs_read_bit) in utils/bitstream.c within GPAC versions prior to 0.8.0.

Affected Systems and Versions

GPAC versions prior to 0.8.0

Exploitation Mechanism

The vulnerability can be exploited through a specially crafted MP4 file.

Mitigation and Prevention

Immediate Steps to Take

Update GPAC to version 0.8.0 or later to mitigate the vulnerability.
Avoid opening or accessing untrusted MP4 files.

Long-Term Security Practices

Regularly update software and apply security patches.
Implement network security measures to prevent malicious files from being executed.

Patching and Updates

Ensure that GPAC is regularly updated to the latest version to address security vulnerabilities.