Siemens SINEC NMS
Plan Patch7.6ICS-CERT ICSA-24-102-07Apr 9, 2024
Attack VectorNetwork
Auth RequiredLow
ComplexityLow
User InteractionNone needed
Summary
SINEC NMS before V2.0 SP2 contains multiple vulnerabilities related to improper error handling (CWE-754) and path traversal (CWE-22). These flaws allow authenticated attackers to access sensitive information or execute unintended actions on the NMS. Siemens has released V2.0 SP2 as a corrective update.
What this means
What could happen
SINEC NMS vulnerabilities could allow an authenticated attacker to disrupt network monitoring operations or access sensitive configuration data. Depending on what SINEC NMS monitors and manages in your network, this could blind operators to critical infrastructure status or enable lateral movement.
Who's at risk
Network managers and OT staff at utilities and water authorities who use Siemens SINEC NMS to manage and monitor networked industrial devices. This includes any site relying on SINEC NMS for real-time visibility into PLCs, HMIs, or other Siemens control equipment.
How it could be exploited
An attacker with valid credentials to SINEC NMS could exploit path traversal or error handling flaws to read arbitrary files or execute commands on the NMS system. If SINEC NMS is network-accessible from untrusted segments, credential compromise would enable this attack.
Prerequisites
- Valid SINEC NMS user credentials or access token
- Network access to SINEC NMS management interface (typically TCP port for web or SSH access)
- SINEC NMS version before V2.0 SP2 deployed
remotely exploitablerequires authenticationaffects network monitoring and visibilitylow EPSS score (0.6%)
Exploitability
Low exploit probability (EPSS 0.6%)
Affected products (1)
ProductAffected VersionsFix Status
SINEC NMS<V2.0 SP22.0 SP2
Remediation & Mitigation
0/4
Do now
0/1WORKAROUNDRestrict network access to SINEC NMS management interfaces using firewall rules—allow only from authorized engineering workstations and management networks
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXUpdate SINEC NMS to version 2.0 SP2 or later
Long-term hardening
0/2HARDENINGSegment SINEC NMS onto a dedicated management network physically or logically isolated from business network and internet
HARDENINGEnforce strong authentication for SINEC NMS user accounts; disable default or shared credentials
CVEs (2)
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