CVE-2021-39798 : Security Advisory and Response

This CVE-2021-39798 article provides insights into a vulnerability affecting Android versions 12 and 12L, potentially leading to arbitrary code execution and privilege escalation.

Understanding CVE-2021-39798

CVE-2021-39798 is a vulnerability found in Bitmap_createFromParcel of Android, allowing possible arbitrary code execution due to a missing bounds check.

What is CVE-2021-39798?

This vulnerability in Bitmap_createFromParcel in Bitmap.cpp on Android could enable attackers to execute arbitrary code, leading to local escalation of privilege. No user interaction is required for exploitation.

The Impact of CVE-2021-39798

The exploitation of this vulnerability could result in a local escalation of privilege, requiring only User execution privileges.

Technical Details of CVE-2021-39798

This section covers technical aspects of the CVE to help users understand its implications.

Vulnerability Description

The vulnerability stems from a missing bounds check in Bitmap_createFromParcel of Android, enabling potential arbitrary code execution.

Affected Systems and Versions

Product: Android
Versions: Android-12, Android-12L

Exploitation Mechanism

The vulnerability could be exploited without any user interaction, potentially allowing attackers to execute arbitrary code.

Mitigation and Prevention

It is crucial to take immediate and long-term steps to mitigate the risks associated with CVE-2021-39798.

Immediate Steps to Take

Apply security patches provided by Android promptly.
Monitor official sources for updates and advisories.

Long-Term Security Practices

Regularly update the Android operating system to the latest version.
Implement strict access controls and permissions.

Patching and Updates

Ensure to install security patches released by Android to address the vulnerability effectively.