CVE-2016-0930
📋 TL;DR
This vulnerability allows remote attackers to gain SSH access to compilation VMs in Pivotal Cloud Foundry Ops Manager when using vCloud or vSphere. Attackers can exploit this during the installation-time period when these VMs exist using a default password. Organizations running affected PCF Ops Manager versions with vCloud/vSphere are vulnerable.
💻 Affected Systems
- Pivotal Cloud Foundry Ops Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full compromise of compilation VMs leading to lateral movement within the PCF environment, data exfiltration, and potential deployment of malicious containers or applications.
Likely Case
Unauthorized SSH access to compilation VMs allowing attackers to inspect build processes, inject malicious code into compiled artifacts, or use as pivot points for further attacks.
If Mitigated
Limited impact with proper network segmentation and timely patching, restricting attacker access to isolated compilation VMs only.
🎯 Exploit Status
Exploitation requires network access to compilation VMs during their limited existence window. Default credentials are known/guessable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.19 or 1.7.10
Vendor Advisory: https://pivotal.io/security/cve-2016-0930
Restart Required: Yes
Instructions:
1. Upgrade Ops Manager to version 1.6.19 or 1.7.10. 2. Apply the updated Ops Manager tile. 3. Apply changes to the PCF deployment. 4. Verify compilation VMs use secure passwords.
🔧 Temporary Workarounds
Network segmentation
allIsolate compilation VMs from untrusted networks during installation/upgrade windows
Temporary firewall rules
linuxBlock SSH access to compilation VMs except from trusted management networks
iptables -A INPUT -p tcp --dport 22 -s TRUSTED_NETWORK -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP
🧯 If You Can't Patch
- Immediately change default passwords on compilation VMs after deployment
- Minimize the time compilation VMs are accessible by scheduling installations during maintenance windows
🔍 How to Verify
Check if Vulnerable:
Check Ops Manager version and IaaS configuration. If using vCloud/vSphere with versions before 1.6.19 or 1.7.10, system is vulnerable.Check Version:
Check Ops Manager web interface or deployment manifest for version informationVerify Fix Applied:
Verify Ops Manager version is 1.6.19+ or 1.7.10+. Confirm compilation VMs use strong, unique passwords.📡 Detection & Monitoring
Log Indicators:
- Failed SSH authentication attempts to compilation VMs
- Successful SSH logins from unexpected sources
- Compilation VM creation/deletion events
Network Indicators:
- SSH connections to compilation VMs from unauthorized IPs
- Unusual outbound traffic from compilation VMs
SIEM Query:
source="auth.log" AND "sshd" AND ("Failed password" OR "Accepted password") AND destination_ip="COMPILATION_VM_IP"