CVE-2023-32874
📋 TL;DR
CVE-2023-32874 is a critical out-of-bounds write vulnerability in the Modem IMS Stack that allows remote code execution without user interaction or additional privileges. This affects devices using MediaTek chipsets with vulnerable modem firmware. Attackers can exploit this to gain full control of affected devices remotely.
💻 Affected Systems
- MediaTek chipset devices with vulnerable modem firmware
📦 What is this software?
Lr13 by Mediatek
Nr15 by Mediatek
Nr16 by Mediatek
Nr17 by Mediatek
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing persistent remote access, data theft, surveillance capabilities, and use as botnet node.
Likely Case
Remote code execution leading to device takeover, data exfiltration, and potential lateral movement in networks.
If Mitigated
Limited impact with proper network segmentation, but still vulnerable to targeted attacks within network segments.
🎯 Exploit Status
No authentication required, but exploitation requires understanding of modem protocol stack and may require specific network conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware with patch ID MOLY01161803
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/January-2024
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply modem firmware update containing patch MOLY01161803. 3. Reboot device to activate new firmware.
🔧 Temporary Workarounds
Network Segmentation
allIsolate devices with vulnerable modems from critical network segments
Disable Unnecessary Services
allDisable IMS services if not required for device functionality
🧯 If You Can't Patch
- Implement strict network access controls to limit modem interface exposure
- Monitor for unusual modem communication patterns and failed connection attempts
🔍 How to Verify
Check if Vulnerable:
Check modem firmware version against vendor patch information; contact device manufacturer for specific version details.Check Version:
Device-specific commands vary by manufacturer; typically available through device settings or diagnostic menus.Verify Fix Applied:
Verify modem firmware version includes patch MOLY01161803; check with device manufacturer for verification tools.📡 Detection & Monitoring
Log Indicators:
- Unusual modem firmware crashes
- Failed IMS stack initialization
- Abnormal modem protocol messages
Network Indicators:
- Unexpected modem-to-server communications
- Malformed IMS protocol packets
- Suspicious cellular network traffic patterns
SIEM Query:
Search for modem firmware crash events, abnormal IMS protocol activity, or unexpected cellular data connections