CVE-2024-34739 Overview
CVE-2024-34739 is a local privilege escalation vulnerability in the Android operating system. The flaw resides in the shouldRestrictOverlayActivities method of UsbProfileGroupSettingsManager.java within the Android framework. A logic error in this code path allows an attacker to escape the Setup Wizard (SUW) on affected devices. Successful exploitation requires local access and user interaction, but no additional execution privileges are needed. Google addressed the issue in the Android Security Bulletin 2025-05-01.
Critical Impact
Local escalation of privilege through a Setup Wizard escape, permitting an attacker with physical access to bypass initial device provisioning restrictions on Android 13 and Android 14.
Affected Products
- Google Android 13.0
- Google Android 14.0
- Android framework component UsbProfileGroupSettingsManager
Discovery Timeline
- 2024-08-15 - CVE-2024-34739 published to the National Vulnerability Database
- 2025-05-01 - Google publishes fix in the Android Security Bulletin
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-34739
Vulnerability Analysis
The vulnerability is a logic error [CWE-116] in shouldRestrictOverlayActivities inside UsbProfileGroupSettingsManager.java. This method determines whether overlay activities should be restricted while the device is in the Setup Wizard (SUW) provisioning state. The flawed logic returns an incorrect restriction decision under specific USB profile conditions. As a result, an attacker can trigger overlay activities that were intended to be blocked during initial device setup. Escaping SUW grants access to system surfaces that a pre-provisioned device should not expose. This constitutes a local privilege escalation because the attacker executes actions available only after full device provisioning.
Root Cause
The root cause is improper encoding or neutralization of output in the overlay restriction check. The shouldRestrictOverlayActivities method fails to correctly evaluate USB profile group state against the SUW context. Google's patch modifies the framework logic, as shown in the Android framework commit 50e1f8f3.
Attack Vector
Exploitation requires local access to the device and user interaction. An attacker with physical possession of a device in the Setup Wizard state connects USB peripherals or triggers USB profile events. These events cause UsbProfileGroupSettingsManager to invoke shouldRestrictOverlayActivities with parameters that fall into the flawed logic branch. The attacker then launches overlay activities to bypass SUW and reach privileged device surfaces. The vulnerability is described in prose because no public proof-of-concept code is available. Refer to the vendor commit for the exact conditional logic that was corrected.
Detection Methods for CVE-2024-34739
Indicators of Compromise
- Devices in a provisioned state that retain evidence of USB peripheral connections during the Setup Wizard phase.
- Unexpected overlay activity launches on devices that have not completed initial provisioning.
- Android framework logcat entries referencing UsbProfileGroupSettingsManager invocations before SUW completion.
Detection Strategies
- Audit Android build fingerprints across the fleet to identify devices below the 2025-05-01 security patch level.
- Monitor mobile device management (MDM) inventory for Android 13 and Android 14 devices lacking the May 2025 Android Security Bulletin patch.
- Correlate USB attach events with Setup Wizard state transitions on managed devices.
Monitoring Recommendations
- Enforce a minimum Android security patch level policy through your MDM or enterprise mobility platform.
- Alert on Android devices reporting a security patch level older than 2025-05-01 during compliance checks.
- Track physical device custody for corporate devices awaiting initial provisioning.
How to Mitigate CVE-2024-34739
Immediate Actions Required
- Apply the Android security patch level 2025-05-01 or later to all Android 13 and Android 14 devices.
- Prohibit connecting untrusted USB peripherals to devices during the Setup Wizard phase.
- Restrict physical access to unprovisioned corporate Android devices until they complete initial setup.
Patch Information
Google released the fix in the Android Security Bulletin 2025-05-01. The framework change is available in the AOSP commit 50e1f8f3. Device manufacturers must integrate this patch and deliver it through firmware updates. Verify the applied patch level under Settings > About phone > Android security update.
Workarounds
- Complete device provisioning immediately upon receipt to minimize the exposure window in the Setup Wizard state.
- Store unprovisioned devices in secured, access-controlled locations.
- Disable USB accessory mode via kiosk or provisioning policies where supported by the device manufacturer.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
