CVE-2021-25338 : Security Advisory and Response
Learn about CVE-2021-25338, a vulnerability in Samsung Mobile Devices allowing unauthorized memory access. Explore impact, affected versions, and mitigation steps.
A detailed overview of CVE-2021-25338 focusing on the impact, technical details, and mitigation strategies.
Understanding CVE-2021-25338
This section delves into the nature of the CVE-2021-25338 vulnerability.
What is CVE-2021-25338?
The CVE-2021-25338 vulnerability involves improper memory access control in RKP on Samsung mobile devices before SMR Mar-2021 Release 1. This flaw allows an attacker, with a compromised kernel, to write to a specific part of the RKP EL2 memory region.
The Impact of CVE-2021-25338
The vulnerability has a CVSS base score of 4.4, indicating a medium severity issue with a high integrity impact. Although the attack complexity is high, the availability impact is low. The privilege level required for exploitation is also high, requiring user interaction.
Technical Details of CVE-2021-25338
Explore the technical aspects of CVE-2021-25338 in this section.
Vulnerability Description
The vulnerability stems from improper memory access control in RKP, allowing unauthorized writing to specific RKP EL2 memory regions.
Affected Systems and Versions
Samsung mobile devices running selected Q(10.0) and R(11.0) versions before SMR Mar-2021 Release 1 are impacted.
Exploitation Mechanism
Exploiting this vulnerability requires a compromised kernel, giving the attacker the ability to write to the critical RKP EL2 memory region.
Mitigation and Prevention
Discover the steps to mitigate the risks associated with CVE-2021-25338.
Immediate Steps to Take
Users should update their Samsung mobile devices to SMR Mar-2021 Release 1 or later to mitigate this vulnerability. Additionally, users should exercise caution while interacting with untrusted sources or apps.
Long-Term Security Practices
Implementing a comprehensive security policy that includes regular software updates, security patches, and user awareness training can enhance device security in the long run.
Patching and Updates
Staying vigilant with software updates and promptly applying patches released by Samsung can help prevent exploitation of this vulnerability.