CVE-2023-42571
📋 TL;DR
This vulnerability in Samsung's Find My Mobile service allows a physical attacker to remotely unlock a lost device by resetting the Samsung Account password via SMS verification. It affects Samsung device users who haven't updated to the patched version of Find My Mobile.
💻 Affected Systems
- Samsung Find My Mobile service
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full physical access to a lost/stolen device, bypassing all device security and accessing all user data.
Likely Case
Physical attacker unlocks a stolen Samsung device to access personal data, accounts, and potentially perform financial fraud.
If Mitigated
Device remains locked and secure if user has updated Find My Mobile or uses additional authentication factors.
🎯 Exploit Status
Exploitation requires physical access to device and knowledge of associated phone number.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.3.13.4
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2023&month=12
Restart Required: No
Instructions:
1. Open Galaxy Store or Google Play Store. 2. Search for 'Find My Mobile'. 3. Update to version 7.3.13.4 or later. 4. Ensure Samsung Account settings require additional authentication beyond SMS.
🔧 Temporary Workarounds
Disable SMS-based password reset
androidConfigure Samsung Account to require additional authentication factors beyond SMS verification
Enable additional lock screen security
androidUse biometric authentication or strong PIN instead of simple patterns
🧯 If You Can't Patch
- Disable Find My Mobile service temporarily
- Enable remote wipe capability and monitor device location
🔍 How to Verify
Check if Vulnerable:
Check Find My Mobile app version in device settings or app storeCheck Version:
Settings > Apps > Find My Mobile > App info > VersionVerify Fix Applied:
Confirm Find My Mobile version is 7.3.13.4 or later📡 Detection & Monitoring
Log Indicators:
- Multiple failed unlock attempts followed by successful remote unlock
- Samsung Account password reset via SMS
Network Indicators:
- SMS verification requests to Samsung servers from unusual locations
SIEM Query:
source="samsung_account" AND (event="password_reset" OR event="remote_unlock")