Full Report
SINEMA Remote Connect Server Before V3.2 SP4 is affected by multiple vulnerabilities. Siemens has released a new version for SINEMA Remote Connect Server and recommends to update to the latest version.
Analysis Summary
# Vulnerability: Multiple Security Flaws in SINEMA Remote Connect Server
## CVE Details
- **CVE ID:** CVE-2025-40818
- **CVSS Score:** 3.3 (Low)
- **CWE:** CWE-732 (Incorrect Permission Assignment for Critical Resource)
- **CVE ID:** CVE-2025-40819
- **CVSS Score:** 4.3 (Medium)
- **CWE:** CWE-863 (Incorrect Authorization)
## Affected Systems
- **Products:** SINEMA Remote Connect Server (Management platform for VPN tunnel connections).
- **Versions:** All versions prior to V3.2 SP4.
- **Configurations:** Systems where local server access is granted (CVE-2025-40818) or where database access is available to authenticated users (CVE-2025-40819).
## Vulnerability Description
**CVE-2025-40818:** The server stores private SSL/TLS keys with insufficient permission protections. This flaw allows any user with local access to the server to read the private keys.
**CVE-2025-40819:** The application fails to properly validate license restrictions against the database. An authenticated user can bypass license enforcement by directly modifying the `system_ticketinfo` table within the database.
## Exploitation
- **Status:** Not reported as exploited in the wild; no PoC currently available.
- **Complexity:** Low (Both)
- **Attack Vector:**
- CVE-2025-40818: Local
- CVE-2025-40819: Network
## Impact
- **Confidentiality:** Low (CVE-2025-40818 allows reading of private keys; potentially enables traffic decryption or MitM).
- **Integrity:** Low (CVE-2025-40819 allows modification of licensing data).
- **Availability:** None reported.
## Remediation
### Patches
- Siemens recommends updating to **SINEMA Remote Connect Server V3.2 SP4** or a later version.
- **Download Link:** hxxps://support[.]industry[.]siemens[.]com/cs/ww/en/view/109995084/
### Workarounds
- No specific product workarounds provided. Siemens recommends following general security practices:
- Protect network access to the device with appropriate mechanisms.
- Operate devices in a protected IT environment according to Siemens' operational guidelines.
## Detection
- **Indicators of Compromise:**
- Unauthorized access or modification logs related to the `system_ticketinfo` database table.
- Identification of non-root/non-admin users accessing SSL/TLS key storage directories.
- **Detection methods and tools:**
- Audit file system permissions on server private keys.
- Implement database activity monitoring (DAM) to flag direct edits to licensing tables.
## References
- **Vendor Advisory:** hxxps://cert-portal[.]siemens[.]com/productcert/pdf/ssa-626856[.]pdf
- **Siemens Industrial Security Guidelines:** hxxps://www[.]siemens[.]com/cert/operational-guidelines-industrial-security
- **Siemens ProductCERT:** hxxps://www[.]siemens[.]com/cert/advisories