CVE-2021-39661 Explained : Impact and Mitigation

This article provides insights into CVE-2021-39661, a published vulnerability assigned by google_android.

Understanding CVE-2021-39661

CVE-2021-39661 involves a possible out-of-bounds write vulnerability in the _PMRLogicalOffsetToPhysicalOffset of the PowerVR kernel driver, allowing local privilege escalation without additional execution privileges.

What is CVE-2021-39661?

The vulnerability in _PMRLogicalOffsetToPhysicalOffset of the PowerVR kernel driver can lead to local privilege escalation without requiring user interaction.

The Impact of CVE-2021-39661

The exploit could potentially result in local escalation of privilege on affected Android devices, posing a security risk.

Technical Details of CVE-2021-39661

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises from a missing bounds check in _PMRLogicalOffsetToPhysicalOffset, potentially leading to out-of-bounds write.

Affected Systems and Versions

Vendor: n/a
Product: Android
Affected Version: Android SoC

Exploitation Mechanism

The exploit allows threat actors to achieve local escalation of privilege on Android devices without requiring user interaction.

Mitigation and Prevention

Explore the mitigation strategies to address CVE-2021-39661.

Immediate Steps to Take

Monitor security bulletins for patches
Implement access controls to limit system access

Long-Term Security Practices

Regular security training for users
Conduct vulnerability assessments and penetration testing

Patching and Updates

Regularly apply security patches and updates to mitigate the risk posed by CVE-2021-39661.