CVE-2022-27835
📋 TL;DR
This CVE describes an improper boundary check vulnerability in Samsung's UWB (Ultra-Wideband) firmware that allows attackers to write arbitrary memory. It affects Samsung mobile devices with vulnerable UWB firmware versions prior to April 2022 security updates. Successful exploitation could lead to code execution or device compromise.
💻 Affected Systems
- Samsung mobile devices with UWB capabilities
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise including arbitrary code execution, data theft, and persistent backdoor installation
Likely Case
Local privilege escalation allowing attackers to gain elevated privileges on the device
If Mitigated
Limited impact due to firmware-level protections and required physical proximity for UWB exploitation
🎯 Exploit Status
Exploitation requires physical proximity and specialized UWB hardware/knowledge. No public exploits have been documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SMR Apr-2022 Release 1 or later
Vendor Advisory: https://security.samsungmobile.com/securityUpdate.smsb?year=2022&month=4
Restart Required: Yes
Instructions:
1. Check for available system updates in Settings > Software update > Download and install. 2. Install the April 2022 security update or later. 3. Restart device after installation completes.
🔧 Temporary Workarounds
Disable UWB functionality
androidTurn off UWB features to prevent potential exploitation
Settings > Connections > More connection settings > UWB > Toggle off
🧯 If You Can't Patch
- Disable UWB functionality in device settings
- Implement physical security controls to prevent unauthorized device access
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in Settings > About phone > Software information > Android security patch level. If before April 2022, device is vulnerable.Check Version:
Settings > About phone > Software information > Android security patch levelVerify Fix Applied:
Verify Android security patch level shows April 2022 or later in Settings > About phone > Software information📡 Detection & Monitoring
Log Indicators:
- Unexpected UWB service crashes
- Memory access violations in system logs
- Privilege escalation attempts
Network Indicators:
- Unusual UWB communication patterns
- Unexpected proximity-based connections
SIEM Query:
Device logs showing UWB service anomalies OR security patch level before April 2022