CVE-2024-28066
📋 TL;DR
CVE-2024-28066 is a hardcoded credential vulnerability in Unify CP IP Phone firmware that allows attackers to gain root access using a known default password. This affects all systems running the vulnerable firmware version. Attackers can completely compromise affected devices and potentially pivot to other network resources.
💻 Affected Systems
- Unify CP IP Phone
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to eavesdropping on calls, data exfiltration, lateral movement to other network systems, and persistent backdoor installation.
Likely Case
Unauthorized root access to IP phones allowing configuration changes, call interception, and use as pivot points for further attacks.
If Mitigated
Limited impact if devices are isolated in separate VLANs with strict network segmentation and access controls.
🎯 Exploit Status
Exploitation requires network access to the device but uses simple password authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Check vendor website for firmware updates and apply if released.
🔧 Temporary Workarounds
Change root password
allManually change the root password on all affected devices
passwd root
Network segmentation
allIsolate IP phones in separate VLAN with restricted access
🧯 If You Can't Patch
- Segment IP phones into isolated network zones with strict firewall rules
- Implement network monitoring for authentication attempts to IP phones
🔍 How to Verify
Check if Vulnerable:
Check firmware version via device web interface or SSH using default credentialsCheck Version:
ssh root@[ip-address] 'cat /etc/version'Verify Fix Applied:
Attempt SSH login with default credentials - should fail if password changed📡 Detection & Monitoring
Log Indicators:
- Failed SSH authentication attempts
- Successful root logins from unexpected sources
Network Indicators:
- SSH connections to IP phones from unauthorized IPs
- Unusual outbound traffic from IP phones
SIEM Query:
source="ssh.log" (user="root" AND action="accepted") OR (user="root" AND action="failed")