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Siemens ROS Improper Input Validation (Update A)

Low RiskICS-CERT ICSA-14-087-01ADec 29, 2014
Summary

Siemens ROS contains an improper input validation vulnerability (CWE-20) that could allow an attacker to send malformed input to the device, potentially causing malfunction or denial of service. Affected versions include ROS versions prior to v3.11, ROS v3.11 versions prior to ROS_v3.11.5 (RS950G product), ROS v4.0 versions prior to ROS_v4.1.0 (RSG2488 product), and ROS v3.12 versions prior to ROS_v3.12.4.

What this means
What could happen
An attacker who can send specially crafted input to a Siemens ROS device could cause the device to malfunction or stop responding, disrupting remote operations and monitoring capabilities on your network equipment.
Who's at risk
Operators of Siemens ROS remote operations systems, particularly those managing RS950G and RSG2488 equipment used for distributed monitoring and control. This affects network infrastructure that relies on ROS for remote device management.
How it could be exploited
An attacker sends malformed input data to the ROS device through its network interface. The device fails to properly validate or sanitize the input, allowing the attacker to trigger unexpected behavior or cause a denial of service that affects remote operations.
Prerequisites
  • Network access to the ROS device
  • Ability to send input data to the affected service
improper input validationaffects remote operations capabilityolder versions have no patch availablelow exploit probability (0.3% EPSS)
Exploitability
Low exploit probability (EPSS 0.3%)
Affected products (4)
1 with fix3 pending
ProductAffected VersionsFix Status
ROS: <v3.11<v3.11No fix yet
ROS v3.11 (for product RS950G): <ROS_v3.11.5<ROS v3.11.5No fix yet
ROS v4.0 (for product RSG2488): <ROS_v4.1.0<ROS v4.1.0No fix yet
ROS v3.12: <ROS_v3.12.4<ROS v3.12.4ROS_v3.12.4
Remediation & Mitigation
0/3
Do now
0/1
WORKAROUNDRestrict network access to ROS devices on ports used for remote operations to only trusted administrative networks
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpdate ROS v3.12 devices to ROS_v3.12.4 or later
Long-term hardening
0/1
HARDENINGFor older ROS versions (v3.11, v4.0) with no patches available, implement network segmentation and firewall rules to restrict access to ROS devices to only authorized management workstations
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