CVE-2025-11323
📋 TL;DR
A buffer overflow vulnerability in the UTT 1250GW router's web interface allows remote attackers to execute arbitrary code by exploiting the strcpy function in the formUserStatusRemark component. This affects all versions up to v2v3.2.2-200710. Attackers can potentially gain full control of affected devices without authentication.
💻 Affected Systems
- UTT 1250GW
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, lateral movement into internal networks, and persistent backdoor installation.
Likely Case
Device takeover enabling traffic interception, credential theft, and use as attack platform for further network exploitation.
If Mitigated
Limited impact if device is behind strict firewall rules with no external access, though internal threats remain.
🎯 Exploit Status
Exploit code is publicly available on GitHub. Remote exploitation requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - vendor did not respond to disclosure
Vendor Advisory: None available
Restart Required: Yes
Instructions:
No official patch available. Consider replacing affected devices with supported alternatives.
🔧 Temporary Workarounds
Disable web management interface
allTurn off the vulnerable web interface component if not required for operations
Router-specific - check device documentation for disabling web interface
Restrict network access
linuxApply strict firewall rules to limit access to router management interface
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Isolate affected devices in separate VLAN with strict access controls
- Implement network monitoring and IDS/IPS rules to detect exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at System > Firmware or via SSH using 'cat /proc/version'Check Version:
ssh admin@router_ip 'cat /proc/version' or check web interfaceVerify Fix Applied:
No fix available to verify. Monitor for vendor updates and check version after any potential future updates.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/formUserStatusRemark with long Username parameters
- Multiple failed exploitation attempts with varying payload lengths
Network Indicators:
- Unusual traffic patterns to router management interface from unexpected sources
- Shellcode patterns in HTTP requests to port 80/443
SIEM Query:
source="router_logs" AND uri="/goform/formUserStatusRemark" AND (username_length>100 OR contains(username,"\x90\x90"))