CVE-2021-0328 Missing authorization in Android

High 7.8 Published 10 Feb 2021 Updated 3 Aug 2024

Local attackers can bypass Bluetooth scan permissions to retrieve scan results, leading to privilege escalation and data exposure on Android devices.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2021-0328?

CVE-2021-0328 is a high-severity missing authorization vulnerability in Google Android, published on 10 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In onBatchScanReports and deliverBatchScan of GattService.java, there is a possible way to retrieve Bluetooth scan results without permissions due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-8.1 Android-9Android ID: A-172670415

Weakness: CWE-862

Which versions are affected by CVE-2021-0328?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-0328?

Apply the vendor's patch.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-0328 being exploited?

There is no known exploitation of CVE-2021-0328 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

All Google Android vulnerabilities

Sources

Also known as A-172670415, ASB-A-172670415, GHSA-73px-6q8p-4pc2.