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Siemens Insights Hub Private Cloud

Act Now9.8ICS-CERT ICSA-25-100-05Apr 8, 2025
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

Siemens Insights Hub Private Cloud contains multiple vulnerabilities in the Ingress NGINX Controller for Kubernetes stemming from improper input validation (CWE-20) and insufficient output encoding (CWE-653). These flaws allow an unauthenticated, network-based attacker to execute arbitrary code in the context of the ingress controller, disclose Kubernetes Secrets (including credentials and API tokens stored by the platform), or cause denial of service. The ingress controller is a critical component that routes all inbound traffic to the cloud platform and has access to sensitive operational data and credentials. Siemens states that an updated version is available and recommends users update to the latest release.

What this means
What could happen
An attacker could execute arbitrary code on the Insights Hub Private Cloud Kubernetes ingress controller, potentially compromising the entire cloud platform's ability to route and manage operational data, or steal Kubernetes secrets (including credentials and API tokens) that could grant access to controlled assets downstream.
Who's at risk
This vulnerability affects organizations using Siemens Insights Hub Private Cloud, a Kubernetes-based analytics and data management platform deployed on-premises to support industrial operations. Any organization relying on Insights Hub for operational intelligence, data collection from PLCs, sensors, and SCADA systems, or real-time process monitoring is at risk. This includes water utilities, electrical utilities, manufacturing facilities, and other critical infrastructure operators.
How it could be exploited
An attacker with network access to the ingress-nginx controller (typically exposed for HTTP/HTTPS traffic routing) can send a malicious request exploiting input validation flaws (CWE-20) to inject commands or access secrets. No authentication is required. The attack leverages the controller's privileged position in the Kubernetes cluster to execute code or exfiltrate sensitive data.
Prerequisites
  • Network access to the Insights Hub Private Cloud ingress controller endpoint
  • No authentication or valid credentials required
  • Ingress-nginx controller must be deployed (standard in Insights Hub Private Cloud)
Remotely exploitableNo authentication requiredLow attack complexityCritical CVSS score (9.8)Very high EPSS score (90.3%)Affects cloud platform infrastructure hosting operational dataDefault Kubernetes ingress-nginx controller exposed
Exploitability
High exploit probability (EPSS 90.3%)
Affected products (1)
ProductAffected VersionsFix Status
Insights Hub Private CloudAll versionsFix available
Remediation & Mitigation
0/5
Do now
0/2
HOTFIXContact Siemens customer support to receive and deploy the latest patched version of Insights Hub Private Cloud
WORKAROUNDRestrict network access to the Insights Hub Private Cloud ingress controller using firewall rules; do not expose the ingress endpoint directly to the internet
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HARDENINGImplement regular monitoring and alerting for suspicious HTTP requests to the ingress controller endpoints
Long-term hardening
0/2
HARDENINGIsolate the Insights Hub Private Cloud infrastructure (including Kubernetes cluster hosting the ingress controller) from business networks using network segmentation
HARDENINGIf remote access to the platform is required, route traffic through a VPN or bastion host rather than exposing the ingress controller directly
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