CVE-2021-25456 Explained : Impact and Mitigation

A vulnerability in the libswmfextractor.so library before SMR Sep-2021 Release 1 of Samsung Mobile Devices allows attackers to trigger an out-of-bounds read and execute memcpy at arbitrary addresses via a crafted wmf file.

Understanding CVE-2021-25456

This section will cover the details related to CVE-2021-25456.

What is CVE-2021-25456?

The CVE-2021-25456 vulnerability exists in the libswmfextractor.so library before SMR Sep-2021 Release 1 of Samsung Mobile Devices, enabling attackers to execute memcpy at any address using a manipulated wmf file.

The Impact of CVE-2021-25456

The impact of this vulnerability is rated as medium severity with a CVSS base score of 5.5. It requires local attack vector and user interaction.

Technical Details of CVE-2021-25456

In this section, we will delve into the technical aspects of CVE-2021-25456.

Vulnerability Description

The vulnerability is classified as an out-of-bounds read (CWE-125) and poses a high integrity impact without requiring privileges.

Affected Systems and Versions

Samsung Mobile Devices with versions O(8.1), P(9.0), Q(10.0), R(11.0) before SMR Sep-2021 Release 1 are impacted.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing a malicious wmf file to trigger the out-of-bounds read flaw.

Mitigation and Prevention

This section will outline the mitigation strategies for CVE-2021-25456.

Immediate Steps to Take

Users are advised to update their Samsung Mobile Devices to SMR Sep-2021 Release 1 or later to eliminate the vulnerability.

Long-Term Security Practices

Regularly check for security updates from Samsung Mobile and apply them promptly to safeguard against potential threats.

Patching and Updates

Stay informed about upcoming security patches and ensure timely installation to enhance the security posture of the devices.