PT-2021-13357 · Google · Android

Published 2021-11-01 · Updated 2021-12-17 · CVE-2021-0927

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Android versions Android-8.1 through Android-12

Description A logic error in the requestChannelBrowsable function of TvInputManagerService.java may allow a permission bypass. This issue could lead to local escalation of privilege without requiring additional execution privileges. User interaction is not necessary for exploitation.

Recommendations For Android versions Android-8.1 through Android-12, consider restricting access to the TvInputManagerService until a patch is available. As a temporary workaround, consider disabling the requestChannelBrowsable function in TvInputManagerService.java to minimize the risk of exploitation.

Fix

Improper Preservation of Permissions

Weakness Enumeration

CWE-281

Related Identifiers

ASB-A-189824175

CVE-2021-0927

Affected Products

Android

References · 5

• https://source.android.com/security/bulletin/2021-11-01 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-0927 · Vendor Advisory
• https://osv.dev/vulnerability/ASB-A-189824175 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-0927 · Security Note
• https://t.me/cibsecurity/34103 · Telegram Post