CVE-2023-41112
📋 TL;DR
A buffer overflow vulnerability in Samsung Exynos processors allows attackers to cause abnormal termination (crash) of mobile devices by sending specially crafted data to the RLC task and module. This affects Samsung smartphones, wearables, automotive systems, and modems using vulnerable Exynos chipsets.
💻 Affected Systems
- Samsung Mobile Processor
- Wearable Processor
- Automotive Processor
- Modem 5123
- Modem 5300
- Auto T5123
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash leading to denial of service, potentially requiring physical restart. In some configurations, could enable arbitrary code execution.
Likely Case
Device instability, random crashes, and service disruption affecting phone functionality.
If Mitigated
Limited impact with proper input validation and memory protection mechanisms in place.
🎯 Exploit Status
Exploitation requires sending malformed data to the RLC module, which may be accessible via baseband interfaces. No public exploits confirmed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Samsung security updates for specific device models
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/
Restart Required: Yes
Instructions:
1. Check for Samsung security updates in device settings. 2. Install latest firmware update. 3. Reboot device after installation. 4. Verify update applied successfully.
🔧 Temporary Workarounds
Disable vulnerable network features
allTemporarily disable advanced network features that may use vulnerable RLC components
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Implement network monitoring for abnormal RLC protocol traffic
🔍 How to Verify
Check if Vulnerable:
Check device model and chipset in Settings > About Phone. Compare with affected Exynos versions list.Check Version:
Settings > About Phone > Software Information (Android) or equivalent on other platformsVerify Fix Applied:
Verify security patch level in Settings > About Phone > Software Information matches latest Samsung security update.📡 Detection & Monitoring
Log Indicators:
- Abnormal RLC task terminations
- Baseband processor crashes
- Unexpected device reboots
Network Indicators:
- Malformed RLC protocol packets
- Unusual baseband communication patterns
SIEM Query:
Search for RLC task failures or baseband exceptions in device logs