CVE-2021-29390 : What You Need to Know

A heap-based buffer over-read vulnerability has been discovered in libjpeg-turbo version 2.0.90, specifically in decompress_smooth_data in jdcoefct.c.

Understanding CVE-2021-29390

This CVE identifies a security issue in the libjpeg-turbo library that can lead to a heap-based buffer over-read vulnerability.

What is CVE-2021-29390?

The vulnerability lies in the decompress_smooth_data function within jdcoefct.c in libjpeg-turbo version 2.0.90, allowing malicious actors to trigger a 2-byte buffer over-read.

The Impact of CVE-2021-29390

Exploitation of this vulnerability could potentially lead to information disclosure or denial of service attacks on systems utilizing the affected version of libjpeg-turbo.

Technical Details of CVE-2021-29390

This section provides more specific technical information regarding the CVE.

Vulnerability Description

The vulnerability involves a heap-based buffer over-read, specifically affecting the decompress_smooth_data function in jdcoefct.c within libjpeg-turbo version 2.0.90.

Affected Systems and Versions

All systems using libjpeg-turbo version 2.0.90 are impacted by this vulnerability.

Exploitation Mechanism

Malicious actors can exploit this issue by crafting a special input to trigger the heap-based buffer over-read during the image decompression process.

Mitigation and Prevention

Here are the steps you can take to mitigate the risks associated with CVE-2021-29390.

Immediate Steps to Take

Update libjpeg-turbo to a patched version provided by the vendor.
Restrict access to systems running the vulnerable version.

Long-Term Security Practices

Regularly update software libraries to the latest versions.
Conduct security audits to identify and address vulnerabilities proactively.

Patching and Updates

Refer to the vendor advisories and relevant links provided to download and apply the necessary patches to address this vulnerability.