CVE-2023-35802
📋 TL;DR
CVE-2023-35802 is a critical buffer overflow vulnerability in the CAPWAP protocol implementation of IQ Engine on Extreme Network AP devices. Attackers with access to the internal management interface can exploit this to execute arbitrary code with elevated privileges. Organizations using affected Extreme Network AP devices are at risk.
💻 Affected Systems
- Extreme Network AP devices running IQ Engine
📦 What is this software?
Iq Engine by Extremenetworks
Iq Engine by Extremenetworks
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary code, pivot to other network segments, and maintain persistent access to the network infrastructure.
Likely Case
Remote code execution leading to AP device compromise, network disruption, and potential credential harvesting from connected devices.
If Mitigated
Limited impact if network segmentation prevents access to management interfaces and proper access controls are in place.
🎯 Exploit Status
Exploitation requires network access to management interface and knowledge of CAPWAP protocol manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IQ Engine 10.6r1 and later
Vendor Advisory: https://extremeportal.force.com/ExtrArticleDetail?an=000112741
Restart Required: Yes
Instructions:
1. Download IQ Engine 10.6r1 or later from Extreme Networks support portal. 2. Backup current configuration. 3. Upload and install the new firmware. 4. Reboot the AP device. 5. Verify the firmware version is 10.6r1 or higher.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to AP management interfaces using network segmentation and firewall rules
Disable CAPWAP if not needed
allDisable CAPWAP protocol on AP devices if not required for network operations
🧯 If You Can't Patch
- Implement strict network segmentation to isolate AP management interfaces from general network traffic
- Deploy network monitoring and intrusion detection systems to detect CAPWAP protocol anomalies
🔍 How to Verify
Check if Vulnerable:
Check IQ Engine firmware version via AP web interface or CLI. If version is below 10.6r1, the device is vulnerable.Check Version:
show version (via CLI) or check System Information in web interfaceVerify Fix Applied:
Verify firmware version is 10.6r1 or higher and test CAPWAP connectivity to ensure functionality is maintained.📡 Detection & Monitoring
Log Indicators:
- Unusual CAPWAP protocol traffic patterns
- Multiple failed CAPWAP connection attempts
- AP device reboots or instability
Network Indicators:
- Abnormal CAPWAP packet sizes
- Suspicious traffic to AP management interfaces on port 5246/5247
SIEM Query:
source_port:5246 OR source_port:5247 AND (packet_size > threshold OR protocol_anomaly = true)