PT-2021-12991 · Google · Android

Published 2021-01-01 · Updated 2023-08-10 · CVE-2021-0307

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-11

Description: The issue is related to a confused deputy in the updatePermissionSourcePackage function of PermissionManagerService.java, which could lead to a local escalation of privilege. This allows a malicious app to gain access to a dangerous permission without needing additional execution privileges or user interaction.

Recommendations: For Android versions Android-10 through Android-11, consider restricting access to sensitive permissions to minimize the risk of exploitation until a patch is available. As a temporary workaround, review and restrict the use of automatic runtime permission grants to prevent silent access to dangerous permissions.

Fix

Related Identifiers

ASB-A-155648771

CVE-2021-0307

Affected Products

Android

References · 7

• https://osv.dev/vulnerability/ASB-A-155648771 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-0307 · Security Note
• https://osv.dev/vulnerability/CVE-2021-0307 · Vendor Advisory
• https://source.android.com/security/bulletin/2021-01-01 · Vendor Advisory
• https://android.googlesource.com/platform/cts/+/a8a90255d43845e307b6d133c710b802dbece622 · Note
• https://twitter.com/0xor0ne/status/1689675603224535041 · Twitter Post
• https://android.googlesource.com/platform/frameworks/base/+/a9f825922e1870575aeab11a2035903c217233c9 · Note