CVE-2021-39684 : Exploit Details and Defense Strategies

This CVE-2021-39684 involves a vulnerability in the Android kernel that could allow local escalation of privilege without the need for additional execution privileges.

Understanding CVE-2021-39684

This section provides an overview of the CVE-2021-39684 vulnerability.

What is CVE-2021-39684?

In target_init of gs101/abl/target/slider/target.c in Android, a logic error could result in the possible allocation of RWX memory. This issue could be exploited for local privilege escalation without requiring user interaction.

The Impact of CVE-2021-39684

The vulnerability could lead to local escalation of privilege on affected Android systems, posing a security risk.

Technical Details of CVE-2021-39684

This section delves into the technical aspects of the CVE-2021-39684 vulnerability.

Vulnerability Description

The flaw in target_init of gs101/abl/target/slider/target.c allows for the potential allocation of RWX memory, creating a security risk for Android systems.

Affected Systems and Versions

Product: Android
Versions: Android kernel

Exploitation Mechanism

The vulnerability does not require any user interaction and could be exploited for local privilege escalation.

Mitigation and Prevention

Guidelines to mitigate and prevent exploitation of CVE-2021-39684.

Immediate Steps to Take

Apply patches provided by the vendor promptly.
Monitor vendor communications for updates and security advisories.
Implement the principle of least privilege within the system.

Long-Term Security Practices

Regularly update and patch the operating system and software.
Conduct security assessments and penetration testing periodically.
Employ security mechanisms like SELinux to enhance system security.

Patching and Updates

Stay informed about security updates from the Android vendor.
Apply patches promptly to address the vulnerability and enhance system security.