Siemens SINEC INS

Act NowCVSS 9.9ICS-CERT ICSA-24-319-08Nov 12, 2024

Siemens

Attack path

Attack VectorNetwork

Auth RequiredLow

ComplexityLow

User InteractionNone needed

Summary

SINEC INS versions before V1.0 SP2 Update 3 contain multiple critical vulnerabilities affecting authentication, memory handling, input validation, and authorization. These flaws enable authenticated attackers to execute code, manipulate data structures, access restricted information, or bypass security controls. The vulnerabilities span CWE-287 (improper authentication), CWE-787 (buffer overflow), CWE-22 (path traversal), CWE-78 (OS command injection), and others. Siemens has released SINEC INS V1.0 SP2 Update 3 as the corrected version.

What this means

What could happen

Multiple critical vulnerabilities in SINEC INS allow an authenticated attacker to execute arbitrary code, manipulate data, or disrupt the integrity and availability of the network security system, potentially compromising plant-wide communications and control.

Who's at risk

Organizations running Siemens SINEC INS for industrial network security and access control should prioritize this update. This affects manufacturers, utilities, and critical infrastructure operators who use SINEC INS to manage and protect automation networks, PLCs, and industrial devices.

How it could be exploited

An attacker with valid credentials to SINEC INS can exploit authentication bypass, buffer overflow, or input validation flaws to gain remote code execution on the network security appliance. Once compromised, the attacker could intercept or modify industrial network traffic, alter access policies, or disable security controls protecting critical automation systems.

Prerequisites

Valid credentials to SINEC INS management interface
Network access to SINEC INS administrative port or web interface
Installation of SINEC INS version prior to V1.0 SP2 Update 3

remotely exploitableauthenticated access requiredlow complexityactively exploited (KEV)EPSS score 94.4% (very high)affects network security controlsmultiple vulnerability types

Exploitability

Actively exploited — confirmed by CISA KEV

Public Proof-of-Concept (PoC) on GitHub (10 repositories)

Affected products (1)

ProductAffected VersionsFix Status

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

Remediation & Mitigation

0/4

Do now

0/3

HOTFIXUpdate SINEC INS to version 1.0 SP2 Update 3 or later

WORKAROUNDRestrict network access to SINEC INS management ports to authorized engineering workstations and administrative networks only

HARDENINGEnforce strong credentials for all SINEC INS user accounts and enforce multi-factor authentication if available

Long-term hardening

0/1

HARDENINGImplement network segmentation to isolate SINEC INS in a protected management zone separate from production OT networks

CVEs (59)

View full CISA ICS-CERT advisory

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