CVE-2019-2109 : Exploit Details and Defense Strategies

Android's MakeMPEG4VideoCodecSpecificData function in AVIExtractor.cpp has a vulnerability that could lead to remote code execution.

Understanding CVE-2019-2109

This CVE involves a potential out-of-bounds write issue in Android's AVIExtractor.cpp, allowing for remote code execution.

What is CVE-2019-2109?

The MakeMPEG4VideoCodecSpecificData function in AVIExtractor.cpp may have an inadequate bounds check, leading to unauthorized memory writes. This vulnerability could enable remote execution of malicious code without additional privileges, requiring user interaction for exploitation.

The Impact of CVE-2019-2109

Vulnerability Type: Remote code execution
Affected Versions: Android 7.0, 7.1.1, 7.1.2, 8.0, 8.1
Android ID: A-130651570

Technical Details of CVE-2019-2109

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability stems from an incorrect bounds check in the MakeMPEG4VideoCodecSpecificData function, potentially leading to unauthorized memory writes.

Affected Systems and Versions

The following systems and versions are impacted:

Android 7.0
Android 7.1.1
Android 7.1.2
Android 8.0
Android 8.1

Exploitation Mechanism

User interaction is required for the exploitation of this vulnerability, which could result in remote code execution.

Mitigation and Prevention

To address CVE-2019-2109, consider the following mitigation strategies.

Immediate Steps to Take

Apply security patches promptly
Monitor for any suspicious activities on affected systems

Long-Term Security Practices

Regularly update and patch software
Implement security best practices to prevent unauthorized access

Patching and Updates

Ensure that all affected systems are updated with the latest security patches to mitigate the risk of exploitation.