CVE-2021-39642 : Vulnerability Insights and Analysis

This article provides insights into a CVE-2021-39642 affecting Android, highlighting its impact and mitigation strategies.

Understanding CVE-2021-39642

CVE-2021-39642 is a vulnerability in the Android kernel that could potentially lead to local escalation of privilege.

What is CVE-2021-39642?

In the synchronous_process_io_entries of lwis_ioctl.c, a race condition may cause an out-of-bounds write, enabling privilege escalation without user interaction.

The Impact of CVE-2021-39642

This vulnerability could allow attackers to escalate their privileges locally, requiring system execution privileges for exploitation.

Technical Details of CVE-2021-39642

CVE-2021-39642 entails specific details and implications regarding the affected systems.

Vulnerability Description

The issue stems from an out-of-bounds write in the Android kernel, specifically in synchronous_process_io_entries of lwis_ioctl.c.

Affected Systems and Versions

Product: Android
Versions: Android kernel

Exploitation Mechanism

The exploit involves leveraging a race condition to trigger an out-of-bounds write, enabling local privilege escalation.

Mitigation and Prevention

It's crucial to take immediate and long-term security measures to address CVE-2021-39642.

Immediate Steps to Take

Monitor official sources for patches and updates
Implement access controls to limit system privileges

Long-Term Security Practices

Regular security assessments and audits
Training employees on recognizing and reporting security threats

Patching and Updates

Keep systems up to date with the latest security patches
Apply vendor-released patches promptly