CVE-2019-20091 Explained : Impact and Mitigation

Bento4 1.5.1.0 has been identified with a vulnerability that leads to a NULL pointer dereference in specific scenarios.

Understanding CVE-2019-20091

In Bento4 1.5.1.0, a vulnerability exists that triggers a NULL pointer dereference under certain conditions.

What is CVE-2019-20091?

This CVE refers to a flaw in Bento4 1.5.1.0 that causes a NULL pointer dereference in the mp42ts module when certain functions are called.

The Impact of CVE-2019-20091

The vulnerability can be exploited to cause a denial of service (DoS) condition or potentially execute arbitrary code on the affected system.

Technical Details of CVE-2019-20091

The technical aspects of this CVE are as follows:

Vulnerability Description

The issue arises from a NULL pointer dereference in AP4_Descriptor::GetTag within the mp42ts module, specifically when called from AP4_DecoderConfigDescriptor::GetDecoderSpecificInfoDescriptor in Ap4DecoderConfigDescriptor.cpp.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by invoking specific functions within the affected module, leading to the NULL pointer dereference.

Mitigation and Prevention

To address CVE-2019-20091, consider the following steps:

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Monitor vendor communications for security advisories.

Long-Term Security Practices

Regularly update software and firmware to the latest versions.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Ensure that all software components are up to date with the latest security patches.