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Siemens SINEC INS

Act Now9.9ICS-CERT ICSA-23-017-03Jan 10, 2023
Attack VectorNetwork
Auth RequiredLow
ComplexityLow
User InteractionNone needed
Summary

Siemens SINEC INS versions prior to 1.0 SP2 Update 1 contain multiple vulnerabilities that allow an authenticated attacker to read and write arbitrary files on the device and execute arbitrary code. The vulnerabilities include command injection (CWE-78), path traversal (CWE-22), buffer overflow (CWE-787), weak cryptography (CWE-326), and insufficient randomness (CWE-330) in third-party components. DHCP service (CVE-2022-45094) and SFTP service (CVE-2022-45093) are specifically identified as vulnerable.

What this means
What could happen
An attacker with valid user credentials could read or write arbitrary files on the SINEC INS device and execute arbitrary code, potentially disrupting network synchronization, configuration management, or allowing lateral movement into industrial automation systems.
Who's at risk
Network time synchronization and industrial automation infrastructure relying on Siemens SINEC INS for network synchronization services in manufacturing, utilities, and critical infrastructure environments should prioritize this vulnerability.
How it could be exploited
An attacker with valid user credentials gains network access to the SINEC INS device. The attacker exploits file system vulnerabilities (CWE-22, CWE-787) or command injection flaws (CWE-78) to read sensitive files, modify configurations, or execute arbitrary commands, ultimately achieving code execution on the device.
Prerequisites
  • Valid user credentials for SINEC INS
  • Network access to the affected SINEC INS device (port unspecified, likely 443 or management interface)
  • SINEC INS version prior to 1.0 SP2 Update 1
Remotely exploitableRequires valid user credentialsLow attack complexityHigh EPSS score (89.6%)Affects network infrastructure serving industrial automation systems
Exploitability
High exploit probability (EPSS 89.6%)
Affected products (1)
ProductAffected VersionsFix Status
SINEC INS<V1.0 SP2 Update 11.0 SP2 Update 1
Remediation & Mitigation
0/6
Do now
0/2
WORKAROUNDDisable the DHCP service on SINEC INS if not required for network operations
WORKAROUNDDisable the SFTP service on SINEC INS if not required for remote file management
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpdate SINEC INS to version 1.0 SP2 Update 1 or later
Long-term hardening
0/3
HARDENINGImplement network segmentation to isolate SINEC INS from the general IT network and the Internet
HARDENINGRestrict user access to SINEC INS to the minimum necessary for operations (least-privilege principle)
HARDENINGDeploy a firewall or access control list to limit network access to SINEC INS management interfaces
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