CVE-2020-19481 Explained : Impact and Mitigation

An issue was discovered in GPAC before 0.8.0, as demonstrated by MP4Box. It contains an invalid memory read in gf_m2ts_process_pmt in media_tools/mpegts.c that can cause a denial of service via a crafted MP4 file.

Understanding CVE-2020-19481

This CVE identifies a vulnerability in GPAC before version 0.8.0 that can lead to a denial of service attack through a specific MP4 file.

What is CVE-2020-19481?

The vulnerability in GPAC allows for an invalid memory read, potentially leading to a denial of service when processing a malicious MP4 file.

The Impact of CVE-2020-19481

The exploitation of this vulnerability could result in a denial of service, disrupting the normal operation of the affected system.

Technical Details of CVE-2020-19481

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The issue lies in the function gf_m2ts_process_pmt within the file media_tools/mpegts.c in GPAC versions prior to 0.8.0, where an invalid memory read occurs.

Affected Systems and Versions

Product: GPAC
Vendor: N/A
Versions affected: All versions before 0.8.0

Exploitation Mechanism

An attacker can exploit this vulnerability by crafting a malicious MP4 file, triggering the invalid memory read and potentially causing a denial of service.

Mitigation and Prevention

Protecting systems from CVE-2020-19481 requires immediate actions and long-term security practices.

Immediate Steps to Take

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

Long-Term Security Practices

Regularly update software and firmware to patch known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Ensure timely installation of security patches and updates to keep systems protected from known vulnerabilities.