CVE-2019-16347 : Vulnerability Insights and Analysis

ngiflib 0.4 version has a heap-based buffer overflow vulnerability in the ngiflib.c file, specifically in the WritePixels() function when called from DecodeGifImg. This vulnerability is a result of improper handling of deinterlacing for small images.

Understanding CVE-2019-16347

This CVE entry describes a specific vulnerability in the ngiflib 0.4 version.

What is CVE-2019-16347?

The vulnerability in ngiflib 0.4 leads to a heap-based buffer overflow due to mishandling of deinterlacing for small images.

The Impact of CVE-2019-16347

This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by crashing the application.

Technical Details of CVE-2019-16347

This section provides more technical insights into the vulnerability.

Vulnerability Description

The issue occurs in the WritePixels() function within the ngiflib.c file when invoked from DecodeGifImg, resulting in a heap-based buffer overflow.

Affected Systems and Versions

Affected Version: ngiflib 0.4
Systems using ngiflib 0.4 are vulnerable to this exploit.

Exploitation Mechanism

The vulnerability is exploited by manipulating the deinterlacing process for small images, leading to a buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2019-16347 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update ngiflib to a patched version or apply vendor-supplied fixes.
Monitor network traffic for signs of exploitation.

Long-Term Security Practices

Regularly update software and libraries to prevent known vulnerabilities.
Implement secure coding practices to avoid buffer overflows and other common vulnerabilities.

Patching and Updates

Stay informed about security updates for ngiflib and apply patches promptly to mitigate the risk of exploitation.