CVE-2021-25487 : Vulnerability Insights and Analysis

A buffer boundary checking vulnerability in the modem interface driver of Samsung Mobile Devices could allow an attacker to execute arbitrary code, posing a high risk to confidentiality.

Understanding CVE-2021-25487

This CVE involves a lack of proper boundary checking in a buffer, leading to potential out-of-bounds read and arbitrary code execution.

What is CVE-2021-25487?

The vulnerability arises from inadequate buffer boundary validation in the set_skb_priv() function of the modem interface driver, allowing unauthorized access to sensitive data.

The Impact of CVE-2021-25487

With a CVSS base score of 7.3 and a high severity rating, CVE-2021-25487 can result in unauthorized disclosure of confidential information stored on the affected Samsung Mobile Devices.

Technical Details of CVE-2021-25487

This section delves into the specific technical aspects of the vulnerability to provide a comprehensive understanding.

Vulnerability Description

The vulnerability stems from the lack of proper boundary checking in a buffer within the modem interface driver, potentially leading to out-of-bounds read and the execution of arbitrary code.

Affected Systems and Versions

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

Exploitation Mechanism

The lack of boundary validation in the set_skb_priv() function can be exploited by an attacker to trigger an out-of-bounds read and subsequently execute arbitrary code by exploiting an invalid function pointer.

Mitigation and Prevention

In light of the risks posed by CVE-2021-25487, it is crucial to take immediate remediation steps and establish long-term security practices to prevent similar vulnerabilities in the future.

Immediate Steps to Take

Users of affected Samsung Mobile Devices should apply the necessary security patches provided by the vendor and ensure they are running the SMR Oct-2021 Release 1 or later to mitigate the vulnerability.

Long-Term Security Practices

To enhance overall device security, users are advised to keep their devices up to date, regularly monitor security advisories from Samsung Mobile, and follow best practices for secure device usage.

Patching and Updates

Regularly checking for and applying software updates and security patches from Samsung Mobile is essential to ensure devices are protected against known vulnerabilities, including CVE-2021-25487.