Full Report
SINEC NMS before V3.0 SP1 is affected by multiple vulnerabilities. Siemens has released a new version for SINEC NMS and recommends to update to the latest version.
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Siemens SINEC NMS
## CVE Details
- **CVE IDs:** CVE-2023-4807, CVE-2023-5363, CVE-2023-5678, CVE-2023-6129, CVE-2023-6237, CVE-2023-38709, CVE-2023-46218, CVE-2023-46219, CVE-2023-46280, CVE-2024-0727, CVE-2024-2004, CVE-2024-2379, CVE-2024-2398, CVE-2024-2466, CVE-2024-24795, CVE-2024-27316, CVE-2024-47808.
- **CVSS Score:** 8.4 (High) [Base Score v3.1] / 8.3 (High) [Base Score v4.0]
- **CWE:** Multiple, including CWE-732 (Incorrect Permission Assignment), CWE-770 (Resource Allocation Without Limits), CWE-113 (HTTP Response Splitting), and CWE-297 (Certificate Host Mismatch).
## Affected Systems
- **Products:** SINEC NMS (Network Management System).
- **Versions:** All versions prior to V3.0 SP1.
- **Configurations:** Systems running on Windows 64-bit platforms with newer x86_64 processors (supporting AVX512-IFMA) are specifically susceptible to the OpenSSL-related flaws (e.g., CVE-2023-4807).
## Vulnerability Description
The advisory covers a range of vulnerabilities stemming from integrated third-party components (OpenSSL, Apache HTTP Server, nghttp2) and application-specific flaws:
- **Filesystem Write (CVE-2024-47808):** A database function fails to restrict user permissions, allowing a medium-privileged attacker to write arbitrary content anywhere on the host filesystem.
- **Memory/State Corruption (OpenSSL):** Issues in the POLY1305 MAC implementation can lead to internal application state corruption or crashes on specific hardware architectures.
- **Denial of Service (DoS):** Improper buffering of HTTP/2 headers in `nghttp2` can lead to memory exhaustion.
- **Protocol Attacks:** Includes HTTP response splitting/desynchronization and improper validation of certificates (host mismatch).
## Exploitation
- **Status:** PoC available (indicated by CVSS "Exploit Code Maturity: Proof-of-Concept").
- **Complexity:** Low to Medium (depending on the specific CVE).
- **Attack Vector:** Primarily Network; however, the highest severity flaw (CVE-2024-47808) utilizes a **Local** vector but results in a **Scope Change (S:C)** to the host system.
## Impact
- **Confidentiality:** Low (Some data exposure via certificate mismatches/HTTP desync).
- **Integrity:** High (Arbitrary filesystem writes and application state corruption).
- **Availability:** High (Memory exhaustion and process crashes).
## Remediation
### Patches
- **Update to SINEC NMS V3.0 SP1** or a later version.
- Download link: hxxps://support.industry.siemens.com/cs/ww/en/view/109974917/
### Workarounds
- No specific software workarounds are provided; users are directed to follow general security recommendations.
- Limit network access to the NMS to trusted IP addresses only.
## Detection
- **Indicators of Compromise:** Monitor for unusual database service activity, unexpected files appearing in system directories, or frequent crashes of the NMS process.
- **Detection methods:** Use vulnerability scanners to identify out-of-date SINEC NMS installations. Audit filesystem permissions for the service account running the NMS database.
## References
- **Siemens Security Advisory:** hxxps://cert-portal.siemens.com/productcert/pdf/ssa-331112.pdf
- **Operational Guidelines:** hxxps://www.siemens.com/cert/operational-guidelines-industrial-security
- **Siemens ProductCERT:** hxxps://www.siemens.com/cert/advisories