2021-0577 | Google Android FLV Extractor out-of-bounds write (A-187161771)

By Max On Jul 19, 2021

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6.3	$5k-$25k	0.94

A vulnerability was found in Google Android (Smartphone Operating System) (unknown version) and classified as critical. This issue affects some unknown processing of the component FLV Extractor. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-787. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In flv extractor, there is a possible out of bounds write due to a heap buffer overflow. 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-187161771

The weakness was shared 07/15/2021 as A-187161771. The advisory is shared at source.android.com. The identification of this vulnerability is CVE-2021-0577 since 11/06/2020. The exploitation is known to be easy. An attack has to be approached locally. Required for exploitation is a simple authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/18/2021). 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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