CVE-2013-2600
📋 TL;DR
MiniUPnPd contains an information disclosure vulnerability due to improper use of snprintf() that can leak sensitive memory contents. This affects systems running vulnerable versions of MiniUPnPd, typically embedded devices and routers using UPnP for network discovery. Attackers can exploit this to read arbitrary memory from the UPnP daemon process.
💻 Affected Systems
- MiniUPnPd
📦 What is this software?
Miniupnpd by Miniupnp Project
⚠️ Risk & Real-World Impact
Worst Case
Full memory disclosure leading to credential theft, private key exposure, or other sensitive data leakage that could enable further attacks.
Likely Case
Partial memory disclosure revealing process memory, potentially exposing configuration data, network information, or session tokens.
If Mitigated
Limited impact with proper network segmentation and UPnP disabled on perimeter devices.
🎯 Exploit Status
Exploitation requires network access to the UPnP service (port 1900/udp typically).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: MiniUPnPd 1.4 and later
Vendor Advisory: http://miniupnp.free.fr/
Restart Required: Yes
Instructions:
1. Download MiniUPnPd 1.4 or later from official site. 2. Stop the MiniUPnPd service. 3. Install the updated version. 4. Restart the service.
🔧 Temporary Workarounds
Disable UPnP
linuxCompletely disable the MiniUPnPd service if not required.
systemctl stop miniupnpd
systemctl disable miniupnpd
Network Segmentation
linuxRestrict access to UPnP service using firewall rules.
iptables -A INPUT -p udp --dport 1900 -j DROP
🧯 If You Can't Patch
- Implement strict network ACLs to block external access to port 1900/udp
- Monitor for unusual UPnP traffic patterns and memory access attempts
🔍 How to Verify
Check if Vulnerable:
Check MiniUPnPd version: miniupnpd -v or check package version via package manager.Check Version:
miniupnpd -v 2>/dev/null || dpkg -l | grep miniupnpd || rpm -qa | grep miniupnpVerify Fix Applied:
Confirm version is 1.4 or later and test UPnP functionality remains working.📡 Detection & Monitoring
Log Indicators:
- Unusual memory access patterns in system logs
- Multiple failed UPnP requests from single source
Network Indicators:
- Abnormal UDP traffic to port 1900
- UPnP M-SEARCH requests with malformed headers
SIEM Query:
source_port=1900 AND protocol=udp AND (payload_contains="M-SEARCH" OR payload_size>typical)🔗 References
- http://archives.neohapsis.com/archives/bugtraq/2013-07/0085.html
- http://archives.neohapsis.com/archives/bugtraq/2013-07/0086.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/85774
- https://seclists.org/bugtraq/2013/Jul/84
- https://security-tracker.debian.org/tracker/CVE-2013-2600
- http://archives.neohapsis.com/archives/bugtraq/2013-07/0085.html
- http://archives.neohapsis.com/archives/bugtraq/2013-07/0086.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/85774
- https://seclists.org/bugtraq/2013/Jul/84
- https://security-tracker.debian.org/tracker/CVE-2013-2600
