CVE-2024-57480
📋 TL;DR
H3C N12 V100R005 wireless access points contain a critical buffer overflow vulnerability in their web management interface. Attackers can remotely crash devices or execute arbitrary commands by sending specially crafted POST requests to the /bin/webs endpoint. Organizations using these specific H3C access points are affected.
💻 Affected Systems
- H3C N12
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attackers gain full control of affected access points, enabling network pivoting, credential theft, and persistent backdoor installation.
Likely Case
Attackers cause denial of service by crashing access points, disrupting wireless connectivity for connected users and devices.
If Mitigated
With proper network segmentation and access controls, impact is limited to isolated wireless segments without lateral movement opportunities.
🎯 Exploit Status
Public proof-of-concept demonstrates exploitation via simple HTTP POST request. No authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://h3c.com
Restart Required: No
Instructions:
Check H3C security advisories for firmware updates. If available, download latest firmware and apply through web interface or CLI.
🔧 Temporary Workarounds
Disable Web Management Interface
allDisable the vulnerable web interface and use CLI management only
system-view
undo ip http enable
undo ip https enable
Restrict Management Access
allLimit management interface access to trusted IP addresses only
system-view
acl number 2000
rule permit source 192.168.1.0 0.0.0.255
quit
ip http acl 2000
🧯 If You Can't Patch
- Segment affected APs on isolated VLANs with strict firewall rules
- Implement network-based intrusion detection to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or CLI command: display versionCheck Version:
display versionVerify Fix Applied:
Verify firmware version is updated beyond V100R005 and test POST requests to /bin/webs return proper errors📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /bin/webs with large payloads
- Device reboot/crash logs
- Unusual command execution in system logs
Network Indicators:
- HTTP POST requests to /bin/webs from untrusted sources
- Abnormal traffic patterns to AP management interfaces
SIEM Query:
source_ip NOT IN trusted_networks AND dest_port=80 AND uri_path="/bin/webs" AND http_method="POST" AND content_length>1000