CVE-2021-25415 : What You Need to Know

A vulnerability in Samsung Mobile Devices allows local attackers to remap memory on devices with specific versions. This CVE has a CVSS score of 7.3.

Understanding CVE-2021-25415

This vulnerability, with CWE-94, arises from improper address validation in RKP prior to SMR JUN-2021 Release 1 on Samsung Mobile Devices.

What is CVE-2021-25415?

CVE-2021-25415 involves an improper address validation issue that can be exploited by local attackers to remap EL2 memory as writable.

The Impact of CVE-2021-25415

The impact of this vulnerability is significant, with a CVSS Vector String of AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H. This could lead to local attackers compromising EL1 and modifying EL2 memory.

Technical Details of CVE-2021-25415

This section dives into the specifics of the vulnerability affecting Samsung Mobile Devices.

Vulnerability Description

Assuming EL1 is compromised, an improper address validation in RKP allows local attackers to remap EL2 memory as writable.

Affected Systems and Versions

Samsung Mobile Devices with versions Q(10.0), R(11.0) containing Exynos9610, 9810, 9820, 9830 are impacted prior to SMR JUN-2021 Release 1.

Exploitation Mechanism

Local attackers can exploit this vulnerability, assuming EL1 privilege level is compromised, to remap EL2 memory as writable.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2021-25415.

Immediate Steps to Take

Apply the security update released by Samsung Mobile in SMR JUN-2021 Release 1.

Long-Term Security Practices

Regularly update devices to ensure protection against known vulnerabilities.

Patching and Updates

Stay informed about security updates from Samsung Mobile and apply them promptly to safeguard devices.