OTPulse

Siemens SINEC NMS

Act NowCVSS 8.4ICS-CERT ICSA-24-319-04Nov 12, 2024
Siemens
Attack path
Attack VectorLocal
Auth RequiredLow
ComplexityLow
User InteractionNone needed
Summary

SINEC NMS before version 3.0 SP1 contains multiple vulnerabilities related to improper input validation, authentication bypass, buffer overflows, and insecure certificate handling. These weaknesses could allow local attackers to execute commands, access sensitive data, or disrupt network management operations. The vulnerabilities span improper input handling (CWE-20, CWE-113), memory safety issues (CWE-787, CWE-125), authentication weaknesses (CWE-295, CWE-297), certificate validation failures (CWE-295), and resource management issues (CWE-400, CWE-770, CWE-772).

What this means
What could happen
An attacker with local access to a SINEC NMS system could bypass authentication, access sensitive data, or manipulate network management functions, potentially disrupting visibility and control of critical industrial network infrastructure.
Who's at risk
Network managers and system administrators at utilities and manufacturing facilities using Siemens SINEC NMS for industrial network management and monitoring are affected. This includes organizations with SCADA networks, industrial control systems, or distributed device management that rely on SINEC NMS for visibility and configuration.
How it could be exploited
An attacker with local system access (e.g., via shared workstation, maintenance terminal, or USB) could exploit improper input validation and authentication weaknesses to execute unauthorized commands or access confidential configuration data. The CVSS vector indicates local attack vector with low complexity and low privileges required.
Prerequisites
  • Local access to SINEC NMS system
  • Non-administrative user credentials or ability to interact with the running service
  • SINEC NMS running version prior to 3.0 SP1
Low complexity exploitationNo authentication required for some attack pathsHigh EPSS score (89.4%)Affects network management and visibility systems
Exploitability
Likely to be exploited — EPSS score 89.4%
Public Proof-of-Concept (PoC) on GitHub (3 repositories)
Affected products (1)
ProductAffected VersionsFix Status
SINEC NMS<V3.0 SP13.0 SP1
Remediation & Mitigation
0/4
Do now
0/2
HARDENINGRestrict local access to SINEC NMS workstations using access controls and monitoring of shared or maintenance terminals
HARDENINGEnable and review access logs for SINEC NMS to detect unauthorized access attempts
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpdate SINEC NMS to version 3.0 SP1 or later
Long-term hardening
0/1
HARDENINGIsolate SINEC NMS and managed network devices from business networks using firewalls and network segmentation
View full CISA ICS-CERT advisory
API: /api/v1/advisories/6d8b35ec-fbac-4eec-a6cf-a0d6620bdc06

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Siemens SINEC NMS | CVSS 8.4 - OTPulse