CVE-2020-27030 : What You Need to Know

Android-11 HandleApiCalls.java allows for a possible permission bypass, leading to local privilege escalation without additional execution privileges.

Understanding CVE-2020-27030

In onCreate of HandleApiCalls.java, a confused deputy scenario enables a local app to manipulate alarms without requiring user interaction.

What is CVE-2020-27030?

The vulnerability in HandleApiCalls.java permits an app to set or dismiss alarms on Android-11 without needing extra execution privileges, potentially leading to privilege escalation.

The Impact of CVE-2020-27030

The security flaw allows for a local elevation of privilege, enabling unauthorized manipulation of alarms by an app without user consent.

Technical Details of CVE-2020-27030

HandleApiCalls.java in Android-11 is susceptible to a permission bypass, facilitating unauthorized alarm control.

Vulnerability Description

The confused deputy issue in onCreate of HandleApiCalls.java allows apps to manipulate alarms without proper permissions, leading to privilege escalation.

Affected Systems and Versions

Product: Android
Versions: Android-11

Exploitation Mechanism

The vulnerability enables apps to bypass permission checks and control alarms, potentially escalating privileges locally.

Mitigation and Prevention

Immediate Steps to Take:

Update Android devices to the latest security patches.
Avoid downloading apps from untrusted sources.

Long-Term Security Practices:

Regularly monitor security bulletins and updates from Android.
Implement app permission restrictions to limit unauthorized access.
Conduct security audits to identify and address similar vulnerabilities.

Patching and Updates:

Apply security patches promptly to address known vulnerabilities and enhance system security.