CVE-2021-36411 Explained : Impact and Mitigation

An issue has been found in libde265 v1.0.8 due to incorrect access control. A SEGV caused by a READ memory access in function derive_boundaryStrength of deblock.cc has occurred. The vulnerability causes a segmentation fault and application crash, which leads to remote denial of service.

Understanding CVE-2021-36411

This CVE highlights a vulnerability in libde265 v1.0.8 that can result in a denial of service due to incorrect access control leading to a segmentation fault.

What is CVE-2021-36411?

CVE-2021-36411 is a security vulnerability in libde265 v1.0.8 that allows remote attackers to cause a denial of service (application crash) via incorrect access control, resulting in a segmentation fault.

The Impact of CVE-2021-36411

The impact of this CVE is the crashing of the application, potentially leading to service disruption and denial of service.

Technical Details of CVE-2021-36411

This section discusses the technical details of the vulnerability.

Vulnerability Description

The vulnerability arises from incorrect access control in libde265 v1.0.8, leading to a READ memory access that causes a segmentation fault in the function derive_boundaryStrength of deblock.cc.

Affected Systems and Versions

All versions of libde265 v1.0.8 are affected by this vulnerability.

Exploitation Mechanism

Remote attackers can exploit this vulnerability to trigger a denial of service by causing a SEGV through a READ memory access.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-36411, follow the steps below.

Immediate Steps to Take

Apply the security update provided by libde265 promptly.
Monitor for any unusual application crashes or behavior.

Long-Term Security Practices

Regularly update and patch software to prevent similar vulnerabilities.
Conduct security assessments and audits periodically.

Patching and Updates

Ensure that you keep your libde265 software up to date to protect against known vulnerabilities.