CVE-2019-7699 : Exploit Details and Defense Strategies

A heap-based buffer over-read vulnerability was discovered in Bento4 version 1.5.1-627, specifically in the function AP4_BitStream::WriteBytes. This flaw could be exploited by remote attackers through a specially crafted mp4 input, potentially leading to a denial of service.

Understanding CVE-2019-7699

This CVE entry describes a vulnerability in Bento4 that could allow attackers to trigger an exception and cause a denial of service.

What is CVE-2019-7699?

The vulnerability involves a heap-based buffer over-read in the AP4_BitStream::WriteBytes function within Bento4 version 1.5.1-627. Attackers can exploit this issue using a maliciously crafted mp4 input.

The Impact of CVE-2019-7699

Exploitation of this vulnerability could result in an exception being thrown, potentially leading to a denial of service condition.

Technical Details of CVE-2019-7699

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability exists in the AP4_BitStream::WriteBytes function in Bento4 version 1.5.1-627, allowing for a heap-based buffer over-read.

Affected Systems and Versions

Affected Version: Bento4 version 1.5.1-627
Systems: Any system running the affected Bento4 version

Exploitation Mechanism

Attackers can exploit this vulnerability by providing a specially crafted mp4 input to trigger the heap-based buffer over-read.

Mitigation and Prevention

To address CVE-2019-7699, follow these mitigation strategies:

Immediate Steps to Take

Update Bento4 to a patched version if available
Implement network security measures to prevent unauthorized access

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities
Conduct security assessments and penetration testing to identify and address weaknesses

Patching and Updates

Apply patches or updates provided by Bento4 to fix the vulnerability