CVE-2022-34601
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on H3C Magic R200 routers via a stack overflow in the Delstlist interface. Attackers can exploit this without authentication by sending specially crafted requests to the vulnerable endpoint. All users running the affected firmware version are at risk.
💻 Affected Systems
- H3C Magic R200
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, credential theft, network pivoting, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or launch attacks against internal networks.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public proof-of-concept code exists in GitHub repositories, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not publicly available
Restart Required: Yes
Instructions:
1. Check H3C official website for firmware updates
2. Download latest firmware for Magic R200
3. Access router web interface
4. Navigate to firmware upgrade section
5. Upload and apply new firmware
6. Reboot router after update
🔧 Temporary Workarounds
Disable Web Management Interface
allDisable the vulnerable web interface to prevent exploitation
Access router CLI via SSH/Telnet
Navigate to interface configuration
Disable web management service
Restrict Access with Firewall Rules
linuxBlock external access to router management interface
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 routers in separate VLAN with strict access controls
- Implement network monitoring for exploitation attempts and anomalous traffic
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface at System Status or via CLI command 'show version'Check Version:
show version | grep FirmwareVerify Fix Applied:
Verify firmware version has been updated beyond R200V200R004L02📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /goform/aspForm with unusual parameters
- System log entries showing process crashes or memory errors
Network Indicators:
- Unusual outbound connections from router
- Traffic spikes to/from router management interface
SIEM Query:
source="router_logs" AND (uri="/goform/aspForm" OR message="stack overflow" OR message="memory violation")