CVE-2021-25481 Explained : Impact and Mitigation

An improper error handling in Exynos CP booting driver prior to SMR Oct-2021 Release 1 allows local attackers to bypass a Secure Memory Protector of Exynos CP Memory.

Understanding CVE-2021-25481

This CVE affects Samsung Mobile Devices due to improper error handling in the booting driver of Exynos CP, enabling local attackers to circumvent the Secure Memory Protector.

What is CVE-2021-25481?

CVE-2021-25481 identifies a vulnerability in Samsung Mobile Devices that permits local attackers to bypass the Secure Memory Protector of Exynos CP Memory.

The Impact of CVE-2021-25481

With a CVSS base score of 6.4, this medium-severity vulnerability has a high impact on confidentiality, integrity, and availability of affected devices. Attackers with high privileges can exploit this issue locally.

Technical Details of CVE-2021-25481

The following technical details outline the vulnerability, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from improper error handling in the Exynos CP booting driver before SMR Oct-2021 Release 1, allowing unauthorized access to the Secure Memory Protector.

Affected Systems and Versions

Samsung Mobile Devices running versions O(8.1), P(9.0), Q(10.0), R(11.0) before SMR Oct-2021 Release 1 are impacted by this vulnerability.

Exploitation Mechanism

Local attackers can exploit this vulnerability to bypass the Secure Memory Protector of Exynos CP Memory, compromising the security of the device.

Mitigation and Prevention

To address and prevent CVE-2021-25481, users and organizations should take immediate and long-term security measures.

Immediate Steps to Take

Apply security patches and updates provided by Samsung Mobile to secure the affected devices.
Monitor for any unusual activities or unauthorized system access.

Long-Term Security Practices

Regularly update software and firmware to the latest versions.
Implement access controls to restrict privileges and mitigate potential security risks.

Patching and Updates

Stay informed about security updates from Samsung Mobile and apply them promptly to safeguard against known vulnerabilities.