2021-0573 | Google Android ASF Extractor out-of-bounds write (A-187231635)

By Max On Aug 20, 2021

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5.1	$5k-$25k	0.68

A vulnerability was found in Google Android (Smartphone Operating System) (the affected version is unknown). It has been declared as critical. This vulnerability affects an unknown code block of the component ASF Extractor. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-787. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In asf extractor, there is a possible out of bounds write due to a missing bounds 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 SoCAndroid ID: A-187231635

The weakness was published 08/18/2021 as A-187231635. The advisory is shared for download at source.android.com. This vulnerability was named CVE-2021-0573 since 11/06/2020. The exploitation appears to be easy. The attack needs to be approached locally. The requirement for exploitation is a single authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/19/2021). It is expected to see the exploit prices for this product increasing in the near future.

Applying a patch is able to eliminate this problem.

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