CVE-2021-0519 Memory corruption in Android

High 7.8 Published 17 Aug 2021 Updated 3 Aug 2024

A heap buffer overflow in the Android H.264 encoder allows local attackers to disclose sensitive information 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-2021-0519?

CVE-2021-0519 is a high-severity memory corruption vulnerability in Google Android, published on 17 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In BITSTREAM_FLUSH of ih264e_bitstream.h, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local information disclosure 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-176533109

Weakness: CWE-787

Which versions are affected by CVE-2021-0519?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-0519?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-0519 being exploited?

There is no known exploitation of CVE-2021-0519 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-176533109, ASB-A-176533109, GHSA-3x4v-r279-87fr.