Siemens Ruggedcom WIN Products BEAST Attack Vulnerability
Low RiskICS-CERT ICSA-14-098-03Jan 9, 2014
Summary
Siemens Ruggedcom WIN series devices (WIN7000, WIN7200, WIN5100, WIN5200) contain a BEAST (Browser Exploit Against SSL/TLS) vulnerability in their TLS/SSL encryption implementation. This weakness allows an attacker positioned on the network path between a WIN device and its management workstation to decrypt encrypted traffic, potentially exposing sensitive operational commands or credentials used for device management and control.
What this means
What could happen
An attacker who can intercept network traffic to a Ruggedcom WIN device could decrypt encrypted communications using the BEAST attack, potentially exposing sensitive operational commands or configuration data transmitted between the device and control stations.
Who's at risk
Operators of Siemens Ruggedcom WIN7000, WIN7200, WIN5100, and WIN5200 industrial wireless access points and routers used in utility networks, manufacturing facilities, and critical infrastructure environments where encrypted remote management is in use.
How it could be exploited
An attacker positioned on the network path between a Ruggedcom WIN device and its management workstation (network-in-the-middle position) can exploit the BEAST vulnerability in the device's TLS/SSL implementation to decrypt encrypted traffic carrying operational commands or credentials.
Prerequisites
- Network access to traffic between the WIN device and management workstations (ability to intercept or observe encrypted sessions)
- TLS/SSL encrypted communication in use between the device and management station
- The vulnerable WIN device and management station must be actively communicating
No patch availableAffects remote management capabilityTLS/SSL encryption weakness
Exploitability
Moderate exploit probability (EPSS 3.9%)
Affected products (4)
4 EOL
ProductAffected VersionsFix Status
WIN7000: <v4.4<v4.4No fix (EOL)
WIN7200: <v4.4<v4.4No fix (EOL)
WIN5100: <v4.4<v4.4No fix (EOL)
WIN5200: <v4.4<v4.4No fix (EOL)
Remediation & Mitigation
0/3
Do now
0/1WORKAROUNDRequire use of out-of-band or physically isolated management channels for WIN device administration when possible
Schedule — requires maintenance window
0/2Patching may require device reboot — plan for process interruption
HARDENINGIsolate Ruggedcom WIN devices from untrusted networks using network segmentation and firewall rules to prevent attackers from reaching the device or intercepting traffic
HARDENINGImplement network monitoring and intrusion detection on segments where WIN devices operate to detect suspicious activity or traffic patterns
CVEs (1)
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