CVE-2021-0684 : Exploit Details and Defense Strategies

Android TouchInputMapper.cpp in Android versions 10, 11, 8.1, and 9 allows for local privilege escalation via an out-of-bounds write vulnerability.

Understanding CVE-2021-0684

This CVE identifies a security vulnerability in Android's TouchInputMapper.cpp that could potentially lead to an elevation of privilege without requiring user interaction.

What is CVE-2021-0684?

The CVE-2021-0684 vulnerability exists in the TouchInputMapper::sync function of TouchInputMapper.cpp in Android. It stems from a use-after-free issue that can result in an out-of-bounds write. Attackers can exploit this flaw to escalate privileges locally.

The Impact of CVE-2021-0684

If exploited, this vulnerability could allow threat actors to elevate their privileges on the affected Android devices without the need for additional execution privileges or user interaction.

Technical Details of CVE-2021-0684

This section provides more insight into the specifics of the CVE.

Vulnerability Description

The vulnerability in TouchInputMapper::sync of TouchInputMapper.cpp allows for an out-of-bounds write due to a use-after-free scenario.

Affected Systems and Versions

The impacted systems include Android versions 10, 11, 8.1, and 9.

Exploitation Mechanism

Attackers can leverage this vulnerability to achieve local privilege escalation without requiring user involvement.

Mitigation and Prevention

Explore the following steps to address and prevent potential exploitation of CVE-2021-0684.

Immediate Steps to Take

Apply security patches released by Android promptly.
Monitor for any unusual system behavior that may indicate an exploit attempt.

Long-Term Security Practices

Regularly update Android devices to the latest OS versions to mitigate known vulnerabilities.

Patching and Updates

Regularly check for security updates and apply them as soon as they are available.