CVE-2023-52152
📋 TL;DR
CVE-2023-52152 is an out-of-bounds read vulnerability in mUPnP for C's URI parsing component that can cause application crashes. This affects any application using vulnerable versions of the mUPnP library for Universal Plug and Play functionality. Attackers can trigger denial of service by sending specially crafted network requests.
💻 Affected Systems
- mUPnP for C library
- Applications using mUPnP for C library
📦 What is this software?
Mupnp For C by Cybergarage
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of service for applications using mUPnP, potentially disrupting UPnP-dependent services and causing system instability.
Likely Case
Application crash leading to service interruption for UPnP functionality, requiring manual restart of affected services.
If Mitigated
Limited impact with proper network segmentation and input validation, potentially causing only isolated service restarts.
🎯 Exploit Status
Proof of concept demonstrates crash via malformed URI. Exploitation requires network access to UPnP services.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.3 or later
Vendor Advisory: https://github.com/cybergarage/mupnp/issues/21
Restart Required: Yes
Instructions:
1. Update mUPnP library to version 3.0.3 or later. 2. Recompile any applications using the library. 3. Restart all services using the updated library.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict network access to UPnP services using firewall rules
iptables -A INPUT -p tcp --dport 1900 -j DROP
iptables -A INPUT -p udp --dport 1900 -j DROP
Disable UPnP Services
allTemporarily disable UPnP functionality in applications
🧯 If You Can't Patch
- Implement strict network filtering to block external access to UPnP ports (1900/tcp, 1900/udp)
- Monitor application logs for crash events and implement automatic restart mechanisms
🔍 How to Verify
Check if Vulnerable:
Check mUPnP library version: ldd /path/to/application | grep mupnp and verify version is 3.0.2 or earlierCheck Version:
strings /usr/lib/libmupnp.so | grep 'mUPnP' || dpkg -l | grep mupnp || rpm -qa | grep mupnpVerify Fix Applied:
Verify mUPnP version is 3.0.3 or later and test UPnP functionality with normal operations📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- UPnP service restarts
- Error messages containing 'uri.c' or 'out of bounds'
Network Indicators:
- Malformed HTTP/UPnP requests to port 1900
- Unusual traffic patterns to UPnP services
SIEM Query:
source="application.logs" AND ("segmentation fault" OR "SIGSEGV") AND process="*upnp*"