CVE-2019-12730 : What You Need to Know

FFmpeg version prior to 3.2.14 and 4.x before 4.1.4, specifically the aa_read_header function in the aadec.c file of the library, lacks a check for failure in the sscanf function, allowing uninitialized variables to be utilized.

Understanding CVE-2019-12730

This CVE identifies a vulnerability in FFmpeg versions that could lead to the use of uninitialized variables.

What is CVE-2019-12730?

The vulnerability in the aa_read_header function of FFmpeg versions prior to 3.2.14 and 4.x before 4.1.4 allows for the exploitation of uninitialized variables due to a missing check for failure in the sscanf function.

The Impact of CVE-2019-12730

This vulnerability could be exploited by attackers to potentially execute arbitrary code or cause a denial of service (DoS) condition on systems running the affected FFmpeg versions.

Technical Details of CVE-2019-12730

FFmpeg vulnerability details and affected systems.

Vulnerability Description

The aa_read_header function in libavformat/aadec.c in FFmpeg versions before 3.2.14 and 4.x before 4.1.4 does not check for sscanf failure, allowing the use of uninitialized variables.

Affected Systems and Versions

FFmpeg versions prior to 3.2.14
FFmpeg 4.x versions before 4.1.4

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the uninitialized variables through specially crafted input, potentially leading to unauthorized code execution or DoS attacks.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2019-12730 vulnerability.

Immediate Steps to Take

Update FFmpeg to version 3.2.14 or 4.1.4, which include fixes for this vulnerability.
Monitor for any unusual activities on systems running vulnerable FFmpeg versions.

Long-Term Security Practices

Regularly update software and libraries to the latest versions to patch known vulnerabilities.
Implement proper input validation mechanisms to prevent exploitation of uninitialized variables.

Patching and Updates

Apply security patches provided by FFmpeg promptly to address vulnerabilities and enhance system security.