CVE-2017-17301
📋 TL;DR
This vulnerability allows an unauthenticated remote attacker to forge RSA certificates and bypass identity authentication on affected Huawei networking devices. Attackers can log into devices with specific user permissions, potentially gaining unauthorized access. Affected systems include multiple Huawei AR series routers, CloudEngine switches, and other networking products.
💻 Affected Systems
- Huawei AR120-S
- AR1200
- AR1200-S
- AR150
- AR160
- AR200
- AR200-S
- AR2200
- AR2200-S
- AR3200
- AR3600
- AR510
- CloudEngine 12800
- CloudEngine 5800
- CloudEngine 6800
- CloudEngine 7800
- DP300
- SMC2.0
- SRG1300
- SRG2300
- SRG3300
- TE30
- TE60
- VP9660
- ViewPoint 8660
- eSpace IAD
- eSpace U1981
- eSpace USM
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to reconfigure network, intercept traffic, install persistent backdoors, or use device as pivot point to attack internal networks.
Likely Case
Unauthorized administrative access to networking devices leading to network disruption, data interception, or credential theft.
If Mitigated
Limited impact if devices are behind firewalls, have restricted network access, or use additional authentication layers.
🎯 Exploit Status
Exploitation requires crafting specific RSA certificates to bypass authentication. No public exploit code is known, but the vulnerability description provides enough detail for skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security advisory for specific fixed versions per product
Vendor Advisory: http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20171222-01-cryptography-en
Restart Required: Yes
Instructions:
1. Check Huawei security advisory for your specific product and version. 2. Download and apply the recommended firmware update. 3. Reboot the device after patching. 4. Verify the patch is applied successfully.
🔧 Temporary Workarounds
Disable certificate-based authentication
allTemporarily disable vulnerable certificate authentication methods and use alternative authentication mechanisms
# Consult Huawei documentation for specific commands to disable certificate auth
Network segmentation and access control
allRestrict network access to affected devices using firewalls and ACLs
# Configure firewall rules to limit access to management interfaces
🧯 If You Can't Patch
- Isolate affected devices in separate network segments with strict firewall rules
- Implement multi-factor authentication and disable single certificate-based authentication
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against affected versions list in Huawei advisoryCheck Version:
# display version (Huawei CLI command varies by product)Verify Fix Applied:
Verify firmware version has been updated to a version not listed in the advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected authentication attempts
- Successful logins from unknown sources
- Certificate validation failures
Network Indicators:
- Unusual management interface traffic
- Certificate-based authentication attempts from unexpected sources
SIEM Query:
Example: auth_success AND (source_ip NOT IN allowed_management_ips) OR cert_auth_failure