CVE-2021-0437 Use after free in Android
A double free vulnerability in Android's DRM plugin allows local attackers to escalate privileges within a privileged process without user interaction.
- 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-2021-0437?
CVE-2021-0437 is a high-severity use after free vulnerability in Google Android, published on 13 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In setPlayPolicy of DrmPlugin.cpp, there is a possible double free. This could lead to local escalation of privilege in a privileged process with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-8.1 Android-9 Android-10Android ID: A-176168330
Weakness: CWE-415
Which versions are affected by CVE-2021-0437?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-0437?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-0437 being exploited?
There is no known exploitation of CVE-2021-0437 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-176168330, ASB-A-176168330, GHSA-crfx-f3qh-pfj6.