CVE-2021-39704 Privilege escalation in Android
Local attackers can bypass permissions to run foreground services without user notification, leading to privilege escalation 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-2021-39704?
CVE-2021-39704 is a high-severity vulnerability in Google Android, published on 16 Mar 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In deleteNotificationChannelGroup of NotificationManagerService.java, there is a possible way to run foreground service without user notification due to a permissions bypass. 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-12Android ID: A-209965481
Weakness: CWE-281
Which versions are affected by CVE-2021-39704?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-39704?
Apply the vendor's patch.
Is CVE-2021-39704 being exploited?
There is no known exploitation of CVE-2021-39704 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-209965481, ASB-A-209965481, GHSA-pgpc-g587-47x9.