CVE-2021-25467 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2021-25467, a vulnerability affecting Samsung Mobile Devices.

Understanding CVE-2021-25467

CVE-2021-25467 is a vulnerability in the Vision DSP kernel driver of Samsung Mobile Devices, allowing privilege escalation to Root via possible buffer overflow vulnerabilities before the SMR Oct-2021 Release 1.

What is CVE-2021-25467?

This CVE involves a potential buffer overflow issue in the Vision DSP kernel driver, enabling threat actors to escalate privileges to Root by exploiting loaded library, providing they have system privilege.

The Impact of CVE-2021-25467

With a CVSS base score of 5.3 (Medium Severity), the vulnerability requires high privileges and presents a confidentiality impact of High. Although the availability impact is None, successful exploitation can lead to privileged escalation to Root.

Technical Details of CVE-2021-25467

The following technical details outline the specifics of CVE-2021-25467.

Vulnerability Description

The vulnerability stems from buffer overflow vulnerabilities in the Vision DSP kernel driver before the SMR Oct-2021 Release 1, which can be exploited for privilege escalation to Root.

Affected Systems and Versions

Samsung Mobile Devices with R(11.0) using Exynos 980, 9830, 2100 chipsets are impacted by this vulnerability.

Exploitation Mechanism

Threat actors can gain system privilege and exploit the buffer overflow vulnerabilities in the Vision DSP kernel driver to escalate privileges to Root by hijacking the loaded library.

Mitigation and Prevention

To protect systems from CVE-2021-25467, immediate steps and long-term security practices are necessary.

Immediate Steps to Take

Ensure systems are updated with the latest security patches provided by Samsung post SMR Oct-2021 Release 1 to mitigate the vulnerability.

Long-Term Security Practices

Implement regular security updates and patches to stay protected from emerging threats and vulnerabilities.

Patching and Updates

Regularly check for security updates from Samsung Mobile to address any known vulnerabilities and enhance the security posture of the devices.