CVE-2019-7698 : Security Advisory and Response

A problem was identified in the AP4_Array<AP4_CttsTableEntry>::EnsureCapacity function located in the Core/Ap4Array.h file of Bento4 1.5.1-627. This vulnerability allows specially crafted MP4 input to trigger an attempt at excessive memory allocation, similar to CVE-2018-20095.

Understanding CVE-2019-7698

This CVE entry highlights a memory allocation issue in Bento4 1.5.1-627 when processing MP4 input.

What is CVE-2019-7698?

The vulnerability in the AP4_Array<AP4_CttsTableEntry>::EnsureCapacity function of Bento4 1.5.1-627 allows malicious MP4 input to cause excessive memory allocation.

The Impact of CVE-2019-7698

The vulnerability can be exploited by using the mp42hls tool, leading to potential denial of service or arbitrary code execution.

Technical Details of CVE-2019-7698

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The issue lies in the AP4_Array<AP4_CttsTableEntry>::EnsureCapacity function in Core/Ap4Array.h, where crafted MP4 input triggers excessive memory allocation.

Affected Systems and Versions

Product: Bento4 1.5.1-627
Vendor: N/A
Version: N/A

Exploitation Mechanism

The vulnerability can be exploited by utilizing the mp42hls tool with specially designed MP4 input.

Mitigation and Prevention

Protecting systems from CVE-2019-7698 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor patches or updates promptly.
Avoid processing untrusted MP4 files.
Monitor system logs for any unusual memory allocation activities.

Long-Term Security Practices

Implement input validation mechanisms for all user-supplied data.
Conduct regular security assessments and code reviews.
Stay informed about security advisories related to Bento4.

Patching and Updates

Ensure that Bento4 is updated to a patched version that addresses the memory allocation vulnerability.