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Siemens SINEMA Remote Connect Client

Plan Patch7.6ICS-CERT ICSA-24-074-04Mar 12, 2024
Attack VectorNetwork
Auth RequiredLow
ComplexityLow
User InteractionRequired
Summary

SINEMA Remote Connect Client versions before 3.1 SP1 contain an information disclosure vulnerability (CWE-538) that allows users with valid credentials to access sensitive data in log files, including VPN credentials and configuration information. The vulnerability requires valid user credentials and user interaction to exploit, but poses a risk if credentials are compromised or if users inadvertently expose the logs.

What this means
What could happen
An attacker with login access to the SINEMA Remote Connect Client could read sensitive information stored in log files, including configuration data and potentially VPN credentials. This could expose details about your remote access infrastructure and enable lateral movement into your network.
Who's at risk
Organizations using Siemens SINEMA Remote Connect Client for remote VPN access to industrial networks should be aware of this issue. This affects system administrators and remote workers who use SINEMA for secure remote connections to Siemens-based control systems and engineering workstations.
How it could be exploited
An attacker with valid credentials for SINEMA Remote Connect Client (or who intercepts weak credentials) can access the application and read unencrypted or insufficiently protected log files that contain sensitive data. The log files are stored locally on the system where the client is installed.
Prerequisites
  • Valid user credentials for SINEMA Remote Connect Client
  • Access to the system where the client is installed or its file system
  • User interaction (UI:R indicates user action required, likely opening/viewing logs)
Information disclosureSensitive data exposure (credentials and configuration)Requires valid credentialsLow exploitation complexity
Exploitability
Low exploit probability (EPSS 0.4%)
Affected products (1)
ProductAffected VersionsFix Status
SINEMA Remote Connect Client<V3.1 SP13.1 SP1
Remediation & Mitigation
0/5
Do now
0/2
WORKAROUNDAfter patching, backup and clear all log files from the client installation
HARDENINGChange all VPN credentials used by SINEMA Remote Connect Client accounts
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpdate SINEMA Remote Connect Client to version 3.1 SP1 or later
Long-term hardening
0/2
HARDENINGRestrict network access to SINEMA Remote Connect Client systems using firewalls and access controls
HARDENINGImplement defense-in-depth controls and follow Siemens operational security guidelines for your industrial environment
View full CISA ICS-CERT advisory
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