CVE-2021-0319 Auth bypass in Android
A permissions bypass in Android allows local attackers to obtain nearby Bluetooth MAC addresses without proper authorization, requiring user interaction.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-0319?
CVE-2021-0319 is a high-severity authentication bypass vulnerability in Google Android, published on 11 Jan 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In checkCallerIsSystemOr of CompanionDeviceManagerService.java, there is a possible way to get a nearby Bluetooth device's MAC address without appropriate permissions due to a permissions bypass. This could lead to local escalation of privilege that grants access to nearby MAC addresses, with User execution privileges needed. User interaction is needed for exploitation. Product: Android; Versions: Android-8.0, Android-8.1, Android-9, Android-10, Android-11; Android ID: A-167244818.
Weakness: CWE-863
Which versions are affected by CVE-2021-0319?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-0319?
Apply the vendor's patch.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-0319 being exploited?
There is no known exploitation of CVE-2021-0319 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Google Android
Sources
Also known as A-167244818, ASB-A-167244818, GHSA-m7xm-6mh9-6wwv.