CVE-2021-25476 Explained : Impact and Mitigation
Learn about CVE-2021-25476, an information disclosure vulnerability in select Samsung Mobile Devices prior to SMR Oct-2021 Release 1, allowing attackers to bypass ASLR protection in TEE.
An information disclosure vulnerability in Widevine TA log prior to SMR Oct-2021 Release 1 allows attackers to bypass the ASLR protection mechanism in TEE.
Understanding CVE-2021-25476
This CVE refers to an information disclosure vulnerability affecting select Samsung Mobile Devices with specific Exynos chipsets prior to SMR Oct-2021 Release 1.
What is CVE-2021-25476?
CVE-2021-25476 is an information disclosure vulnerability in the Widevine TA log, which enables attackers to circumvent ASLR protection in TEE.
The Impact of CVE-2021-25476
The vulnerability poses a medium severity risk with a base score of 4.1, allowing attackers with high privileges to gain unauthorized access to sensitive information on affected devices.
Technical Details of CVE-2021-25476
This section provides insight into the specific aspects of the vulnerability.
Vulnerability Description
The vulnerability enables threat actors to bypass the Address Space Layout Randomization (ASLR) protection mechanism in Trusted Execution Environment (TEE) by exploiting the Widevine TA log.
Affected Systems and Versions
Select Samsung Mobile Devices running Q(10.0) and R(11.0) with Exynos chipsets are impacted before the SMR Oct-2021 Release 1.
Exploitation Mechanism
Attackers with high privileges can exploit this vulnerability locally, leading to a high impact on availability, without requiring user interaction.
Mitigation and Prevention
To ensure the security of your device and data, it is crucial to take immediate action and implement long-term security measures.
Immediate Steps to Take
Users are advised to apply security patches provided by Samsung immediately. Regularly update your device to the latest software version.
Long-Term Security Practices
Implement secure usage practices and install security updates promptly to mitigate potential risks.
Patching and Updates
Stay informed about security updates from Samsung and promptly apply any patches released to address known vulnerabilities.