CVE-2021-25416 Explained : Impact and Mitigation
Learn about CVE-2021-25416, a vulnerability in Samsung Mobile Devices allowing local attackers to create executable kernel pages outside the code area. Understand impact, affected systems, and mitigation steps.
This article discusses CVE-2021-25416, a vulnerability found in Samsung Mobile Devices that allows local attackers to create executable kernel pages outside the code area due to improper address validation in RKP.
Understanding CVE-2021-25416
This section provides an overview of the CVE-2021-25416 vulnerability.
What is CVE-2021-25416?
CVE-2021-25416 is a vulnerability in Samsung Mobile Devices that arises from improper address validation in RKP prior to SMR JUN-2021 Release 1. This flaw enables local attackers to generate executable kernel pages beyond the code area.
The Impact of CVE-2021-25416
The impact of this vulnerability includes a risk of local attackers creating and executing malicious kernel code, potentially leading to unauthorized actions on affected devices.
Technical Details of CVE-2021-25416
In this section, we delve into the technical aspects of CVE-2021-25416.
Vulnerability Description
The vulnerability is classified under CWE-94, involving improper control of generation of code (code injection) due to a flaw in RKP address validation.
Affected Systems and Versions
Samsung Mobile Devices with Exynos9610, 9810, 9820, and 9830 running Q(10.0) and R(11.0) prior to SMR JUN-2021 Release 1 are impacted by this vulnerability.
Exploitation Mechanism
Assuming EL1 is compromised, attackers can leverage the improper address validation in RKP to create executable kernel pages outside the designated code area.
Mitigation and Prevention
This section outlines the steps to mitigate and prevent exploitation of CVE-2021-25416.
Immediate Steps to Take
Users are advised to apply security updates provided by Samsung Mobile to address the vulnerability effectively.
Long-Term Security Practices
Implementing security best practices, such as regularly updating software, can help prevent similar vulnerabilities in the future.
Patching and Updates
Regularly check for security updates from Samsung Mobile and promptly apply patches to protect against potential exploits.