PT-2022-10988 · Google · Android

Published 2022-03-01 · Updated 2022-03-23 · CVE-2021-39707

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-10 through Android-12

Description In the onReceive method of AppRestrictionsFragment.java, there is a possible way to start a phone call without permissions due to a confused deputy. 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 Android-10 through Android-12, consider restricting access to the onReceive method of AppRestrictionsFragment.java to minimize the risk of exploitation. As a temporary workaround, consider disabling the functionality that allows starting a phone call without permissions until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-610

Related Identifiers

ASB-A-200688991

CVE-2021-39707

Affected Products

Android

References · 6

• https://osv.dev/vulnerability/ASB-A-200688991 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-39707 · Security Note
• https://osv.dev/vulnerability/CVE-2021-39707 · Vendor Advisory
• https://source.android.com/security/bulletin/2022-03-01 · Vendor Advisory
• https://t.me/cibsecurity/39062 · Telegram Post
• https://android.googlesource.com/platform/packages/apps/Settings/+/4fb753d22e6a2505b1667950d153bc03ad8ae422 · Note