PT-2021-13281 · Google · Android

Published 2021-08-01 · Updated 2022-07-12 · CVE-2021-0645

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Android version 11

Description The issue is related to a possible permissions bypass in the shouldBlockFromTree function of ExternalStorageProvider.java. This could lead to local escalation of privilege, allowing an app to read private app directories in external storage, which should be restricted in Android 11. No additional execution privileges are needed, but user interaction is required for exploitation.

Recommendations For Android version 11, update to a version that includes the fix for this issue, as user interaction is needed for exploitation and this could lead to local escalation of privilege.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

ASB-A-157320644

CVE-2021-0645

Affected Products

Android

References · 6

• https://osv.dev/vulnerability/CVE-2021-0645 · Vendor Advisory
• https://source.android.com/security/bulletin/2021-08-01 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-0645 · Security Note
• https://osv.dev/vulnerability/ASB-A-157320644 · Vendor Advisory
• https://android.googlesource.com/platform/frameworks/base/+/7b82cbbe3411396b187b68548f2c325b42e964a6 · Note
• https://t.me/cvenotify/19543 · Telegram Post