CVE-2021-25479 : Exploit Details and Defense Strategies

A heap-based buffer overflow vulnerability in Exynos CP Chipset prior to SMR Oct-2021 Release 1 allows arbitrary memory write and code execution.

Understanding CVE-2021-25479

This CVE affects Samsung Mobile Devices due to a possible heap-based buffer overflow in the Exynos CP Chipset.

What is CVE-2021-25479?

CVE-2021-25479 is a high-severity vulnerability that allows attackers to trigger a heap-based buffer overflow on affected Samsung Mobile Devices, potentially leading to arbitrary memory write and code execution.

The Impact of CVE-2021-25479

The impact of this vulnerability is considered high, with a CVSS base score of 7.2. It affects confidentiality, integrity, and availability, requiring high privileges to exploit without user interaction.

Technical Details of CVE-2021-25479

This section covers specific technical details related to the vulnerability.

Vulnerability Description

The vulnerability is classified as a heap-based buffer overflow (CWE-122) in the Exynos CP Chipset, potentially allowing attackers to manipulate memory and execute malicious code.

Affected Systems and Versions

Samsung Mobile Devices with versions O(8.1), P(9.0), Q(10.0), and R(11.0) are impacted, specifically those prior to SMR Oct-2021 Release 1.

Exploitation Mechanism

The vulnerability can be exploited by triggering a heap-based buffer overflow in the Exynos CP Chipset, enabling attackers to perform arbitrary memory writes and execute code.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-25479, follow the recommendations below.

Immediate Steps to Take

Apply the necessary security updates provided by Samsung Mobile, particularly the SMR Oct-2021 Release 1 or later.
Monitor security advisories for any patches or workarounds.

Long-Term Security Practices

Implement strong device security measures to prevent unauthorized access.
Regularly update software and firmware to address security vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Samsung Mobile to protect against known vulnerabilities like CVE-2021-25479.