CVE-2021-39630 : What You Need to Know

This CVE-2021-39630 article provides details about a privilege escalation vulnerability affecting Android 12.

Understanding CVE-2021-39630

This section will delve into the vulnerability's nature and impact.

What is CVE-2021-39630?

The vulnerability lies in the executeRequest function of OverlayManagerService.java in Android 12. It allows unauthorized control of fabricated overlays via adb shell commands, leading to potential privilege escalation without requiring extra execution privileges, and does not necessitate user interaction for exploitation.

The Impact of CVE-2021-39630

The vulnerability presents a significant risk of local privilege escalation on devices running Android 12.

Technical Details of CVE-2021-39630

Here, technical specifics of the vulnerability will be discussed.

Vulnerability Description

The issue occurs in OverlayManagerService.java, enabling unauthorized manipulation of overlays through adb shell, potentially leading to local privilege escalation.

Affected Systems and Versions

Product: Android
Versions Affected: Android-12

Exploitation Mechanism

The vulnerability can be exploited through adb shell commands to gain unauthorized control over overlays, allowing for local privilege escalation.

Mitigation and Prevention

In this section, you will find measures to mitigate and prevent exploitation of the vulnerability.

Immediate Steps to Take

Apply the latest security updates from Android to address the vulnerability.
Avoid executing commands from untrusted sources on the device.

Long-Term Security Practices

Regularly update the device's operating system and security patches.
Monitor for security advisories from Android to stay informed about potential vulnerabilities.

Patching and Updates

Ensure timely installation of security patches provided by Android to protect against known vulnerabilities.