CVE-2021-30019 : Exploit Details and Defense Strategies

This CVE-2021-30019 affects GPAC 1.0.1 due to a vulnerability in the adts_dmx_process function, allowing a crafted file to trigger a heap overflow. Here is what you need to know about this CVE.

Understanding CVE-2021-30019

This section provides insights into the impact and technical details of the CVE-2021-30019 vulnerability.

What is CVE-2021-30019?

The vulnerability lies in the adts_dmx_process function in GPAC 1.0.1, where a specially crafted file can lead to a heap overflow due to incorrect size calculations.

The Impact of CVE-2021-30019

An attacker could exploit this vulnerability by enticing a victim to open a malicious file, leading to a heap overflow and potential code execution on the victim's system.

Technical Details of CVE-2021-30019

In this section, we delve into the specific technical aspects of the vulnerability.

Vulnerability Description

The issue arises when the ctx->hdr.frame_size becomes smaller than ctx->hdr.hdr_size, causing size to be a negative number and leading to a heap overflow during memcpy.

Affected Systems and Versions

GPAC version 1.0.1 is affected by this vulnerability, exposing systems that use this particular version to potential exploitation.

Exploitation Mechanism

By manipulating the parameters within a specially crafted file, an attacker can trigger the size miscalculation, resulting in a heap overflow during memory copy operations.

Mitigation and Prevention

This section outlines the necessary steps to mitigate and prevent exploitation of CVE-2021-30019.

Immediate Steps to Take

Users are advised to update GPAC to a patched version or refrain from opening untrusted media files to mitigate the risk of exploitation.

Long-Term Security Practices

Adopting secure coding practices, conducting regular security audits, and staying informed about software vulnerabilities can contribute to long-term security resilience.

Patching and Updates

Regularly checking for security updates from GPAC and promptly applying patches can help protect systems from known vulnerabilities.