CVE-2024-52923
📋 TL;DR
A boundary check vulnerability in Samsung's NRMM component for multiple Exynos processors allows denial of service attacks. Attackers can exploit this by sending specially crafted DL NAS Transport messages to affected devices. This affects Samsung mobile devices, wearables, and modems using the listed Exynos processors.
💻 Affected Systems
- Samsung Mobile Processor
- Samsung Wearable Processor
- Samsung Modem
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash or reboot, rendering the device unusable until manually restarted, potentially disrupting critical communications.
Likely Case
Temporary service disruption on affected devices, requiring user intervention to restore functionality.
If Mitigated
Minimal impact with proper network filtering and updated firmware preventing exploitation.
🎯 Exploit Status
Exploitation requires sending malformed DL NAS Transport messages to the NRMM component
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest security updates from Samsung
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/
Restart Required: No
Instructions:
1. Check for available updates in device settings. 2. Install the latest security patch from Samsung. 3. Verify the patch was successfully applied.
🔧 Temporary Workarounds
Network filtering
allImplement network-level filtering to block malformed DL NAS Transport messages
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Monitor for unusual device crashes or reboots
🔍 How to Verify
Check if Vulnerable:
Check device model and processor information in Settings > About phoneCheck Version:
Not applicable - check via device settings interfaceVerify Fix Applied:
Verify the security patch level in Settings > About phone > Software information📡 Detection & Monitoring
Log Indicators:
- Unexpected device reboots
- NRMM component crashes
- Kernel panic logs
Network Indicators:
- Unusual DL NAS Transport message patterns
- Suspicious network traffic to device modems
SIEM Query:
Not provided - requires custom monitoring for device crash events