CVE-2021-30015 : What You Need to Know

A Null Pointer Dereference vulnerability has been identified in GPAC 1.0.1, specifically in the function filter_core/filter_pck.c:gf_filter_pck_new_alloc_internal. The issue arises from the av1dmx_parse_flush_sample function, where the ctx.opid might be NULL, leading to a crash in gf_filter_pck_new_alloc_internal.

Understanding CVE-2021-30015

This section delves into the key aspects of the CVE-2021-30015 vulnerability.

What is CVE-2021-30015?

CVE-2021-30015 is a Null Pointer Dereference vulnerability in GPAC 1.0.1 that stems from an issue in the function filter_core/filter_pck.c:gf_filter_pck_new_alloc_internal. The flaw triggers a crash due to a NULL ctx.opid in the av1dmx_parse_flush_sample function.

The Impact of CVE-2021-30015

The impact of this vulnerability is the potential for a denial of service (DoS) scenario or exploitation by malicious actors to execute arbitrary code on affected systems.

Technical Details of CVE-2021-30015

This section provides a deeper insight into the technical details of CVE-2021-30015.

Vulnerability Description

The vulnerability allows attackers to cause a program to crash, resulting in a denial of service condition or potentially enabling the execution of arbitrary code.

Affected Systems and Versions

GPAC 1.0.1 is confirmed to be impacted by this vulnerability. Other specific affected versions are not disclosed.

Exploitation Mechanism

By manipulating the ctx.opid parameter to be NULL in the av1dmx_parse_flush_sample function, threat actors can trigger the crash in gf_filter_pck_new_alloc_internal.

Mitigation and Prevention

In this section, we cover the steps to mitigate and prevent CVE-2021-30015.

Immediate Steps to Take

Users and administrators are advised to update GPAC to a patched version provided by the vendor and monitor for any unusual system behavior.

Long-Term Security Practices

Maintaining up-to-date software versions, implementing secure coding practices, and conducting regular security audits can enhance overall system security.

Patching and Updates

Regularly check for security updates from GPAC and apply patches promptly to safeguard against known vulnerabilities.