PT-2022-11036 · Google · Android

Published 2022-03-30 · Updated 2022-10-01 · CVE-2021-39758

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 prior to the fixed version

Description In WindowManager, there is a possible way to start a foreground activity from the background due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Recommendations For Android versions prior to the fixed version, consider restricting background activities to minimize the risk of exploitation. As a temporary workaround, review and restrict the use of foreground activities started from the background until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

ASB-A-205130886

CVE-2021-39758

Affected Products

Android

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2021-39758 · Security Note
• https://osv.dev/vulnerability/ASB-A-205130886 · Vendor Advisory
• https://source.android.com/security/bulletin/android-12l · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-39758 · Vendor Advisory
• https://source.android.com/security/bulletin/2022-10-01 · Note
• https://t.me/cibsecurity/39826 · Telegram Post
• https://android.googlesource.com/platform/frameworks/base/+/8e4efdb653ed38a6b9c3d306208557352d52cbd5 · Note