CVE-2021-25803 : Security Advisory and Response

A buffer overflow vulnerability in the vlc_input_attachment_New component of VideoLAN VLC Media Player 3.0.11 allows attackers to cause an out-of-bounds read via a crafted .avi file.

Understanding CVE-2021-25803

This CVE highlights a buffer overflow vulnerability in VideoLAN VLC Media Player 3.0.11, posing a risk of out-of-bounds read through a malicious .avi file.

What is CVE-2021-25803?

The vulnerability identified as CVE-2021-25803 is a buffer overflow issue found in the vlc_input_attachment_New component of VideoLAN VLC Media Player version 3.0.11. It enables attackers to trigger an out-of-bounds read by employing a specially crafted .avi file.

The Impact of CVE-2021-25803

Exploitation of this vulnerability could lead to an out-of-bounds read, potentially allowing attackers to execute arbitrary code, crash the application, or disclose sensitive information stored in the application's memory.

Technical Details of CVE-2021-25803

The technical aspects of CVE-2021-25803 involve the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability lies in the vlc_input_attachment_New component of VideoLAN VLC Media Player version 3.0.11, which can be exploited through a specifically crafted .avi file.

Affected Systems and Versions

VideoLAN VLC Media Player version 3.0.11 is specifically impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by enticing a user to open a manipulated .avi file, triggering the out-of-bounds read operation.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-25803, immediate actions and long-term security practices should be adopted.

Immediate Steps to Take

Update VideoLAN VLC Media Player to the latest version to eliminate the vulnerability.
Avoid opening untrusted or suspicious .avi files to prevent exploitation.

Long-Term Security Practices

Regularly update software and applications to patch vulnerabilities promptly.
Implement network security measures to detect and prevent malicious activities.

Patching and Updates

Monitor official security advisories from VideoLAN VLC Media Player for patches and updates addressing CVE-2021-25803.