CVE-2016-6452
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to bypass authentication in Cisco Prime Home's web GUI and gain full administrator privileges. It affects Cisco Prime Home versions 5.1.1.6 and earlier, and 5.2.2.2 and earlier. Versions 6.0 and later are not vulnerable.
💻 Affected Systems
- Cisco Prime Home
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the Cisco Prime Home system with full administrative control, allowing attackers to modify configurations, access sensitive data, and potentially pivot to other network systems.
Likely Case
Unauthenticated attackers gain administrative access to the management interface, enabling them to disrupt operations, steal credentials, and modify network configurations.
If Mitigated
If properly segmented and access-controlled, impact is limited to the Prime Home system itself with no lateral movement to other critical systems.
🎯 Exploit Status
Authentication bypass vulnerabilities are typically easy to exploit once the method is understood. No authentication required makes this particularly dangerous.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Upgrade to version 6.0 or later
Vendor Advisory: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161102-cph
Restart Required: Yes
Instructions:
1. Download Cisco Prime Home version 6.0 or later from Cisco's software download center. 2. Backup current configuration and data. 3. Install the new version following Cisco's upgrade documentation. 4. Restart the Prime Home service or server. 5. Verify functionality and restore any custom configurations.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to the Prime Home web interface to trusted IP addresses only
Use firewall rules to allow only specific source IPs to TCP ports 80/443
Disable Web Interface
allTemporarily disable the web GUI if not required for operations
Consult Cisco Prime Home documentation for service disablement procedures
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to isolate the Prime Home system from untrusted networks
- Monitor authentication logs for suspicious activity and implement intrusion detection rules for authentication bypass attempts
🔍 How to Verify
Check if Vulnerable:
Check the Cisco Prime Home version via the web interface or CLI. If version is 5.1.1.6 or earlier, or 5.2.2.2 or earlier, the system is vulnerable.Check Version:
Check via web interface: Login > Help > About, or via CLI: 'show version' commandVerify Fix Applied:
After upgrade, verify the version is 6.0 or later and test that authentication is required for administrative access.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful administrative access from same IP
- Administrative actions from IP addresses not in the allowed list
- Access to admin pages without prior login events
Network Indicators:
- HTTP requests to admin endpoints without authentication headers
- Unusual patterns of access to /admin or similar privileged paths
SIEM Query:
source="cisco_prime_home" AND (event_type="admin_access" AND NOT preceding_event="successful_login")