Vulnerability identifier: #VU28278
Vulnerability risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-264
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Google Android
Operating systems & Components /
Operating system
Vendor: Google
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a missing permission check in "onKeyguardVisibilityChanged" of "key_store_service.cpp" within the System functionality. A local user can gain elevated privileges on the target system, allowing apps to use keyguard-bound keys when the screen is locked.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Google Android: 9.0, 10
External links
http://source.android.com/security/bulletin/2020-05-01
http://android.googlesource.com/platform/system/security/+/1642dc003964aed54724d17d840f883f0537cebd
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.