CVE-2021-25468 : Security Advisory and Response

A vulnerability in Widevine trustlet on select Samsung mobile devices prior to SMR Oct-2021 Release 1 could allow attackers to read arbitrary memory addresses.

Understanding CVE-2021-25468

This section provides an insight into the impact, technical details, and mitigation of CVE-2021-25468.

What is CVE-2021-25468?

The vulnerability in Widevine trustlet on specific Samsung mobile devices prior to SMR Oct-2021 Release 1 enables attackers to compromise confidentiality by reading arbitrary memory addresses, exploiting improper input validation.

The Impact of CVE-2021-25468

With a CVSS base score of 4.4, this medium-severity vulnerability allows high-privileged attackers to access confidential information without requiring user interaction.

Technical Details of CVE-2021-25468

Below are the technical specifics regarding the vulnerability.

Vulnerability Description

The flaw allows attackers to guess and confirm a byte memory vulnerability in Widevine trustlet, leading to unauthorized memory access.

Affected Systems and Versions

Samsung mobile devices with Exynos chipsets running select Q (10.0) and R (11.0) versions before SMR Oct-2021 Release 1 are impacted.

Exploitation Mechanism

The vulnerability requires high privileges but has a low attack complexity, local attack vector, and does not impact availability or integrity.

Mitigation and Prevention

Learn how to secure your systems and prevent exploitation of this vulnerability.

Immediate Steps to Take

To mitigate the risk, Samsung device users should apply security updates promptly and monitor official advisories from Samsung Mobile.

Long-Term Security Practices

Ensure regular software updates, implement proper input validation, and follow security best practices to reduce the likelihood of similar vulnerabilities.

Patching and Updates

Stay informed about security patches released by Samsung Mobile, especially related to Widevine trustlet, to protect your devices from potential attacks.