Missing Authentication Vulnerability in SINEMA Server
Monitor4.7SSA-835377Sep 14, 2021
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionRequired
Summary
A missing authentication vulnerability in SINEMA Server allows an unauthenticated attacker to obtain encoded system configuration backup files under certain conditions. Configuration backups may contain sensitive information including authentication credentials and network topology details. Siemens has released version 14 SP3 which corrects this issue.
What this means
What could happen
An unauthenticated attacker could download encoded system configuration backup files from the SINEMA Server, potentially exposing sensitive network configuration and credentials used to manage your automation network.
Who's at risk
Water utilities and municipal electric systems using Siemens SINEMA Server for centralized management of distributed automation devices (remote terminal units, intelligent electronic devices, programmable controllers). Operators responsible for managing VPN access and configuration of automation networks should prioritize this update.
How it could be exploited
An attacker on the network sends requests to the SINEMA Server without valid credentials to retrieve backup files that contain encoded system configuration data. The attacker gains access to authentication credentials and network topology information stored in these backups.
Prerequisites
- Network access to SINEMA Server port (typically 443/HTTPS)
- No authentication credentials required
- Backup files must exist and be accessible via the web interface
remotely exploitableno authentication requiredlow complexityaffects network management credentials
Exploitability
Low exploit probability (EPSS 0.2%)
Affected products (1)
ProductAffected VersionsFix Status
SINEMA Server< V14 SP314 SP3
Remediation & Mitigation
0/1
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXUpdate SINEMA Server to version 14 SP3 or later
CVEs (1)
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API:
/api/v1/advisories/c3ab8799-db28-4196-adba-fee9167804ab