CVE-2021-36408 : Security Advisory and Response

This article provides an in-depth analysis of CVE-2021-36408, a vulnerability discovered in libde265 v1.0.8 that affects the decoding process, leading to a Heap-use-after-free issue in intrapred.h.

Understanding CVE-2021-36408

CVE-2021-36408 is a published vulnerability affecting libde265 v1.0.8, identified for a Heap-use-after-free flaw during file decoding using dec265.

What is CVE-2021-36408?

CVE-2021-36408 is a security vulnerability in libde265 v1.0.8 that allows remote attackers to execute arbitrary code or cause a denial of service (DoS) via a crafted file.

The Impact of CVE-2021-36408

The vulnerability, if exploited, can result in arbitrary code execution or a DoS condition, posing a serious threat to the security and stability of affected systems.

Technical Details of CVE-2021-36408

This section covers essential technical aspects of the vulnerability.

Vulnerability Description

The issue arises from a Heap-use-after-free in intrapred.h during the decoding process using dec265 in libde265 v1.0.8.

Affected Systems and Versions

All versions of libde265 v1.0.8 are impacted by this vulnerability, exposing systems to potential exploitation.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by crafting a specific file that, when processed by dec265, triggers the Heap-use-after-free condition, leading to potential code execution or DoS.

Mitigation and Prevention

Understanding how to mitigate and prevent CVE-2021-36408 is crucial for maintaining system security.

Immediate Steps to Take

It is recommended to update libde265 to a secure version to address the vulnerability and prevent exploitation. Implement strict input validation to avoid processing malicious files.

Long-Term Security Practices

Regularly monitor security advisories and update mechanisms to stay informed about potential vulnerabilities. Conduct security audits to identify and remediate any existing security weaknesses.

Patching and Updates

Apply security patches issued by the vendor promptly. Keep systems up to date with the latest software versions and security fixes to protect against known vulnerabilities.