CVE-2025-2955
📋 TL;DR
This vulnerability allows remote attackers to improperly access the IBMS configuration file handler in TOTOLINK A3000RU routers. Attackers can exploit this to potentially access sensitive configuration data without proper authentication. Affected users are those running vulnerable firmware versions on these specific router models.
💻 Affected Systems
- TOTOLINK A3000RU
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could extract sensitive router configuration data including network settings, credentials, or other proprietary information that could facilitate further attacks.
Likely Case
Unauthorized access to configuration files containing network settings and potentially sensitive operational data.
If Mitigated
With proper network segmentation and access controls, impact would be limited to configuration file exposure without direct system compromise.
🎯 Exploit Status
Exploit details have been publicly disclosed and the vulnerability can be exploited remotely without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.totolink.net/
Restart Required: Yes
Instructions:
1. Check vendor website for firmware updates. 2. Download latest firmware. 3. Upload via router admin interface. 4. Reboot router after update.
🔧 Temporary Workarounds
Block CGI endpoint access
linuxRestrict access to the vulnerable /cgi-bin/ExportIbmsConfig.sh endpoint using firewall rules
iptables -A INPUT -p tcp --dport 80 -m string --string "/cgi-bin/ExportIbmsConfig.sh" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/cgi-bin/ExportIbmsConfig.sh" --algo bm -j DROP
Disable remote administration
allTurn off remote management features to prevent external exploitation
🧯 If You Can't Patch
- Segment affected routers into isolated network zones with strict firewall rules
- Implement network monitoring for access attempts to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface or attempt to access http://[router-ip]/cgi-bin/ExportIbmsConfig.shCheck Version:
Check via router web interface or telnet/ssh to deviceVerify Fix Applied:
Verify firmware version is above 5.9c.5185 and test that the endpoint no longer returns configuration data📡 Detection & Monitoring
Log Indicators:
- HTTP GET requests to /cgi-bin/ExportIbmsConfig.sh
- Unusual configuration file access patterns
Network Indicators:
- Traffic to router port 80/443 with ExportIbmsConfig.sh in URI
SIEM Query:
source="router_logs" AND uri="/cgi-bin/ExportIbmsConfig.sh"