CVE-2021-25458 : Security Advisory and Response

A NULL pointer dereference vulnerability in the ION driver before SMR Sep-2021 Release 1 for Samsung Mobile Devices with Exynos chipsets allows attackers to exploit and cause memory corruption.

Understanding CVE-2021-25458

This section provides details about the identified vulnerability and its potential impacts.

What is CVE-2021-25458?

CVE-2021-25458 is a NULL pointer dereference vulnerability found in the ION driver of Samsung Mobile Devices with Exynos chipsets. Attackers can leverage this flaw to induce memory corruption.

The Impact of CVE-2021-25458

The vulnerability has a low severity base score of 3.3 according to CVSS v3.1. It poses a low risk in terms of confidentiality and integrity impacts, requiring low privileges and user interaction.

Technical Details of CVE-2021-25458

This section covers technical specifics of the CVE, including how systems are affected and how it can be exploited.

Vulnerability Description

The vulnerability arises from a NULL pointer dereference issue in the ION driver before the SMR Sep-2021 Release 1 on Samsung Mobile Devices with Exynos chipsets, potentially leading to memory corruption.

Affected Systems and Versions

Samsung Mobile Devices running versions O(8.1), P(9.0), Q(10.0), and R(11.0) with Exynos chipsets are affected prior to the SMR Sep-2021 Release 1.

Exploitation Mechanism

The vulnerability, when exploited locally, could allow attackers to corrupt memory, impacting system stability and data integrity.

Mitigation and Prevention

This section outlines the steps users and administrators can take to mitigate the risks posed by CVE-2021-25458.

Immediate Steps to Take

Users are advised to update their Samsung Mobile Devices to the SMR Sep-2021 Release 1 or newer to address the vulnerability. Regularly check for security updates from official sources.

Long-Term Security Practices

Practicing good security hygiene, such as avoiding suspicious links and apps, can reduce the likelihood of exploitation of such vulnerabilities.

Patching and Updates

Maintaining up-to-date software and promptly applying security patches provided by Samsung Mobile is crucial in preventing potential attacks.