2021-0486 | Google Android FLV Extractor PermissionManagerService.java onPackageAddedInternal permission (A-171430330)

By Max On Jul 18, 2021

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6.3	$5k-$25k	0.59

A vulnerability has been found in Google Android 10.0/11.0 (Smartphone Operating System) and classified as critical. This vulnerability affects the function onPackageAddedInternal of the file PermissionManagerService.java of the component FLV Extractor. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-275. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In onPackageAddedInternal of PermissionManagerService.java, there is possible access to external storage due to a permissions bypass. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11Android ID: A-171430330

The weakness was presented 07/15/2021 as A-171430330. The advisory is shared for download at source.android.com. This vulnerability was named CVE-2021-0486 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 known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/18/2021). It is expected to see the exploit prices for this product increasing in the near future.The MITRE ATT&CK project declares the attack technique as T1222.

Applying a patch is able to eliminate this problem.

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