Siemens SINEC INS

Act Now9.9ICS-CERT ICSA-24-319-08Nov 12, 2024

Attack VectorNetwork

Auth RequiredLow

ComplexityLow

User InteractionNone needed

Summary

SINEC INS before version 1.0 SP2 Update 3 is affected by multiple vulnerabilities including authentication bypass, buffer overflows, improper access controls, path traversal, command injection, and denial of service. The vulnerabilities allow an authenticated user with low privileges to gain elevated access, execute arbitrary code, bypass security controls, and cause denial of service across the system with high impact on confidentiality, integrity, and availability.

What this means

What could happen

An attacker with valid credentials could execute arbitrary code on SINEC INS, potentially taking control of the network infrastructure management system that connects Siemens industrial devices. This could allow them to disrupt communication between control systems, alter configurations, or prevent legitimate operators from managing critical infrastructure.

Who's at risk

Water utilities and electric cooperatives that use Siemens SINEC INS to manage and monitor network infrastructure for industrial control systems should prioritize this update. SINEC INS is the network integration server for Siemens ICS environments, so organizations running any significant Siemens automation infrastructure are affected. This includes utilities using SINEC INS for device discovery, configuration management, and network connectivity to PLCs, RTUs, and other field devices.

How it could be exploited

An attacker with valid network credentials to SINEC INS could exploit authentication weaknesses or privilege escalation flaws to gain administrative access. Once authenticated, they could use buffer overflow, command injection, or other code execution vulnerabilities to run arbitrary commands on the INS platform, from which they could pivot to connected industrial control devices or alter system configurations.

Prerequisites

Valid user credentials for SINEC INS
Network access to SINEC INS management interface
Low-privilege user account (privilege escalation required for full impact)

actively exploited (KEV)high CVSS score (9.9)high EPSS score (94.5%)low complexity attackaffects network infrastructure managementmultiple vulnerability types increase attack surface

Exploitability

Actively exploited — confirmed by CISA KEV

Affected products (1)

ProductAffected VersionsFix Status

SINEC INS<V1.0 SP2 Update 31.0 SP2 Update 3

Remediation & Mitigation

0/5

Do now

0/4

HOTFIXUpdate SINEC INS to version 1.0 SP2 Update 3 or later

WORKAROUNDRestrict network access to SINEC INS management interface using firewall rules and network segmentation to allow only authorized operators and administrative systems

HARDENINGImplement network segmentation to isolate SINEC INS from direct internet access and untrusted networks

HARDENINGReview and enforce strong credential policies for all SINEC INS user accounts and disable or remove unused accounts

Schedule — requires maintenance window

0/1

Patching may require device reboot — plan for process interruption

HARDENINGConfigure logging and monitoring on SINEC INS to detect suspicious authentication attempts or privilege escalation activities

CVEs (59)

View full CISA ICS-CERT advisory

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