Siemens RuggedCom ROX-based Devices Certificate Verification Vulnerability (Update A)
Low RiskICS-CERT ICSA-14-135-03AFeb 15, 2014
Summary
Siemens RuggedCom ROX devices fail to properly verify SSL/TLS certificates when establishing secure communications with remote servers. This vulnerability, classified as an improper certificate verification issue (CWE-347), allows an attacker to intercept and forge certificate exchanges, potentially leading to unauthorized access or manipulation of device management traffic. The vulnerability affects ROX 1 devices with firmware versions prior to 1.16.1 and ROX 2 devices with firmware versions prior to 2.6. No vendor patch is currently available for either product line.
What this means
What could happen
An attacker could intercept and modify communications between RuggedCom ROX devices and other systems by presenting a fake certificate, potentially allowing them to inject commands or alter configuration data on critical network infrastructure equipment.
Who's at risk
Water utilities, municipal electric utilities, and other critical infrastructure operators using Siemens RuggedCom ROX managed switches and industrial routers for network communications and remote management should be aware of this vulnerability. Affected operators rely on these devices for secure management of SCADA networks and remote site connectivity.
How it could be exploited
An attacker positioned to intercept network traffic (e.g., on the same network segment or via man-in-the-middle) could present a fraudulent SSL/TLS certificate to a RuggedCom ROX device. Because the device does not properly verify certificate authenticity, it would accept the fake certificate and establish an encrypted connection with the attacker instead of the legitimate server, allowing credential theft or command injection.
Prerequisites
- Network access to ROX device management or communication ports
- Ability to intercept or redirect network traffic (ARP spoofing, DNS hijacking, or similar)
- No requirement for valid credentials to perform the attack
Certificate verification bypassMan-in-the-middle attack possibleNo patch available from vendorAffects network infrastructureLow complexity attack
Exploitability
Moderate exploit probability (EPSS 4.8%)
Affected products (2)
2 EOL
ProductAffected VersionsFix Status
ROX 1: <1.16.1<1.16.1No fix (EOL)
ROX 2: <2.6<2.6No fix (EOL)
Remediation & Mitigation
0/3
Do now
0/1WORKAROUNDImplement network-layer certificate pinning or VPN solutions to protect management traffic to ROX devices until a patch is available
Mitigations - no patch available
0/2The following products have reached End of Life with no planned fix: ROX 1: <1.16.1, ROX 2: <2.6. Apply the following compensating controls:
HARDENINGSegment RuggedCom ROX devices on a restricted network and limit access from only trusted engineering workstations and management systems using firewall rules
HARDENINGMonitor and log all remote management connections to ROX devices to detect suspicious certificate or connection patterns
CVEs (1)
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