CVE-2021-25339 : Exploit Details and Defense Strategies

A detailed overview of CVE-2021-25339 focusing on the impact, technical details, and mitigation strategies.

Understanding CVE-2021-25339

This section provides insights into the CVE-2021-25339 vulnerability affecting Samsung Mobile Devices.

What is CVE-2021-25339?

The CVE-2021-25339 vulnerability involves improper address validation in HArx on Samsung mobile devices before the SMR Mar-2021 Release 1. This flaw allows an attacker, with a compromised kernel, to corrupt EL2 memory.

The Impact of CVE-2021-25339

With a CVSS base score of 4.4, this vulnerability has a medium severity rating as it requires high privileges. It poses a risk of high integrity impact and low availability impact.

Technical Details of CVE-2021-25339

Delve deeper into the technical aspects of CVE-2021-25339 to understand its scope.

Vulnerability Description

The flaw arises due to improper address validation in HArx, enabling memory corruption in EL2 on specific Samsung Mobile Devices.

Affected Systems and Versions

Samsung Mobile Devices with versions Q(10.0) and R(11.0) before SMR Mar-2021 Release 1 are impacted by this vulnerability.

Exploitation Mechanism

An attacker, given a compromised kernel, can exploit this vulnerability to corrupt EL2 memory on affected devices.

Mitigation and Prevention

Explore the measures to mitigate the risks associated with CVE-2021-25339 and prevent potential security breaches.

Immediate Steps to Take

Ensure to apply security patches from Samsung Mobile promptly to address this vulnerability. Limit user interaction to mitigate the impact of the attack.

Long-Term Security Practices

Implement secure coding practices, perform regular security audits, and educate users about safe device usage to enhance long-term security.

Patching and Updates

Stay informed about security updates and advisories from Samsung Mobile to promptly install patches and protect your devices.