PT-2022-14602 · Google · Android

Published 2022-08-11 · Updated 2022-08-13 · CVE-2022-20377

Positive Technologies (AI Summary)

CVSS v3.1

6.7

Medium

Base vector

AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Android versions prior to the fixed version

Description In the keymaster ipc.cpp, there is a possibility to force gatekeeper, fingerprint, and faceauth to use a known HMAC key. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Recommendations As a temporary workaround, consider disabling the gatekeeper, fingerprint, and faceauth features until a patch is available. Restrict access to the keymaster ipc.cpp module to minimize the risk of exploitation. Avoid using the HMAC key in the affected API endpoints until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2022-20377

Affected Products

Android

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2022-20377 · Security Note
• https://source.android.com/security/bulletin/pixel/2022-08-01 · Vendor Advisory
• https://t.me/cvenotify/34576 · Telegram Post
• https://t.me/cvenotify/34633 · Telegram Post
• https://t.me/cibsecurity/47978 · Telegram Post