Privilege escalation in Google Android

1) Race condition

EUVDB-ID: #VU48932

Risk: Medium

CVSSv3.1: 8.1 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-27059

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a malicious application to elevate privileges on the system.

The vulnerability exists due to a race condition when processing two activities, related to fingerprint input. A malicious application installed on the device can bypass mitigations, implemented by Android and gain elevated privileges within the system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

A patch will be released in the January 2021 Android Security Bulletin.

Vulnerable software versions

Google Android: 9.0 - 10

External links

http://www.darkreading.com/threat-intelligence/fingerprint-jacking-attack-technique-manipulates-android-ui-/d/d-id/1339684

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.