PT-2022-10929 · Google · Android

Published 2022-01-01 · Updated 2022-07-12 · CVE-2021-39621

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-9 through Android-12

Description The issue is related to a possible permissions bypass due to an unsafe PendingIntent in the sendLegacyVoicemailNotification function of LegacyModeSmsHandler.java. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation.

Recommendations For Android versions Android-9 through Android-12, update to a version that includes the fix for the permissions bypass issue in LegacyModeSmsHandler.java. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

ASB-A-185126319

CVE-2021-39621

Affected Products

Android

References · 6

• https://source.android.com/security/bulletin/2022-01-01 · Vendor Advisory
• https://osv.dev/vulnerability/ASB-A-185126319 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-39621 · Security Note
• https://osv.dev/vulnerability/CVE-2021-39621 · Vendor Advisory
• https://android.googlesource.com/platform/packages/apps/Dialer/+/9c452d9f25d8fb41fd3ec627293a2481fde778d4 · Note
• https://t.me/cibsecurity/35605 · Telegram Post