CVE-2025-11355
📋 TL;DR
A buffer overflow vulnerability in UTT 1250GW routers allows remote attackers to execute arbitrary code by exploiting the strcpy function in the aspChangeChannel component. This affects all versions up to v2v3.2.2-200710. Attackers can compromise the device without authentication.
💻 Affected Systems
- UTT 1250GW
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network infiltration, and potential lateral movement to other systems.
Likely Case
Remote code execution allowing attackers to install malware, create backdoors, or disrupt network services.
If Mitigated
Limited impact if device is behind firewalls with strict inbound filtering, though still vulnerable to internal threats.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available on GitHub. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
No official patch available. Vendor did not respond to disclosure. Consider replacing affected devices or implementing workarounds.
🔧 Temporary Workarounds
Network Segmentation
allIsolate UTT 1250GW devices in separate VLANs with strict firewall rules limiting access to management interface.
Access Control Lists
allImplement ACLs to restrict access to the web management interface (port 80/443) to trusted IP addresses only.
🧯 If You Can't Patch
- Replace affected UTT 1250GW devices with supported models from vendors that provide security updates.
- Deploy network-based intrusion prevention systems (IPS) with signatures for this CVE to block exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface at http://[device-ip]/ or using SNMP if enabled. Versions v2v3.2.2-200710 and earlier are vulnerable.Check Version:
curl -s http://[device-ip]/ | grep -i 'firmware version' or check web interface manuallyVerify Fix Applied:
No official fix available to verify. Monitor vendor website for security updates.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/aspChangeChannel with long pvid parameters
- Device reboot or crash logs following web interface access
Network Indicators:
- HTTP POST requests to /goform/aspChangeChannel with unusually long parameter values
- Traffic to/from device on non-standard ports after compromise
SIEM Query:
source="utt_router" AND url="/goform/aspChangeChannel" AND (param_length>100 OR status_code=500)