PatchSiren cyber security CVE debrief

CVE-2024-39571 Siemens CVE debrief

CVE-2024-39571 is a high-severity command injection vulnerability in Siemens SINEMA Remote Connect Server, published July 9, 2024. The vulnerability stems from missing server-side input sanitization when loading SNMP configurations, allowing an authenticated attacker with SNMP configuration modification rights to execute arbitrary code with root privileges. The CVSS 3.1 score of 8.8 reflects network attack vector, low attack complexity, low privileges required, and high impact across confidentiality, integrity, and availability. Siemens has released a vendor fix in version 3.2 HF1 or later. Organizations should prioritize patching, restrict SNMP configuration access to authorized personnel only, and implement network segmentation for management interfaces.

Vendor: Siemens
Product: SINEMA Remote Connect Server
CVSS: HIGH 8.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2024-07-09
Original CVE updated: 2024-07-09
Advisory published: 2024-07-09
Advisory updated: 2024-07-09

Who should care

Organizations operating Siemens SINEMA Remote Connect Server in industrial or critical infrastructure environments, OT security teams, network administrators responsible for remote connectivity infrastructure, and compliance officers managing IEC 62443 or NIST CSF security controls for industrial systems.

Technical summary

The vulnerability exists in the SNMP configuration loading functionality of SINEMA Remote Connect Server. Insufficient server-side input validation allows injection of operating system commands through SNMP configuration parameters. Successful exploitation requires authenticated access with rights to modify SNMP configuration, but results in arbitrary code execution with root privileges on the underlying system. The attack vector is network-accessible with low complexity, making this a critical patching priority for affected OT environments.

Defensive priority

high

Recommended defensive actions

Update Siemens SINEMA Remote Connect Server to version 3.2 HF1 or later as specified in vendor security advisory
Restrict SNMP configuration modification rights to only essential administrative accounts
Implement network segmentation to limit access to SINEMA Remote Connect Server management interfaces
Monitor for unauthorized SNMP configuration changes and anomalous privileged process execution
Review and apply CISA ICS recommended practices for industrial control system defense in depth

Evidence notes

Vulnerability description and remediation guidance sourced from CISA ICS Advisory ICSA-24-193-09 and Siemens security advisory SSA-928781. CVSS vector confirms network accessibility with privilege requirements. Vendor fix explicitly documented with specific version guidance.

Official resources

2024-07-09