CVE-2021-40943 : Security Advisory and Response

In Bento4 1.6.0-638, a null pointer reference in AP4_DescriptorListInspector::Action function can lead to a denial of service (DOS).

Understanding CVE-2021-40943

This CVE involves a vulnerability in Bento4 1.6.0-638 that can result in a denial of service.

What is CVE-2021-40943?

This CVE identifies a null pointer reference in the function AP4_DescriptorListInspector::Action in Ap4Descriptor.h:124, demonstrated by GPAC, posing a DOS risk.

The Impact of CVE-2021-40943

The vulnerability allows attackers to cause a denial of service by exploiting the null pointer reference in Bento4 1.6.0-638.

Technical Details of CVE-2021-40943

This section describes the technical aspects of the CVE.

Vulnerability Description

The vulnerability involves a null pointer reference in the function AP4_DescriptorListInspector::Action in Ap4Descriptor.h:124 in Bento4 1.6.0-638, exploited through GPAC.

Affected Systems and Versions

Affected Version: Bento4 1.6.0-638
Vendor: n/a
Product: n/a

Exploitation Mechanism

Attackers can exploit the null pointer reference in the mentioned function, potentially leading to a denial of service.

Mitigation and Prevention

Protect systems from the CVE with the following strategies.

Immediate Steps to Take

Apply security patches promptly to address the vulnerability.
Monitor for any unusual system behavior that could indicate exploitation.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Conduct security assessments to identify and mitigate similar vulnerabilities.

Patching and Updates

Ensure timely patching of affected systems and dependencies to prevent exploitation.