Full Report
Siemens Tecnomatix Plant Simulation contains multiple vulnerabilities that could be triggered when the application reads PAR, SPP, STP and PRT files. If a user is tricked to open a malicious file using the affected application, this could lead to a crash, and potentially also to arbitrary code execution on the target host system. Siemens has released updates for the affected products and recommends to update to the latest versions.
Analysis Summary
# Vulnerability: Multiple File Parsing Vulnerabilities in Siemens Tecnomatix Plant Simulation
## CVE Details
Multiple CVEs are present, all sharing the same classification severity details:
- **CVE ID:** CVE-2023-37246, CVE-2023-37247, CVE-2023-37248, CVE-2023-37374, CVE-2023-38679, CVE-2023-38680, CVE-2023-38681, CVE-2023-41846
- **CVSS Score:** 7.8 (High)
- **CWE:** Multiple, including CWE-122 (Heap-based Buffer Overflow), CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow), and CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer).
## Affected Systems
- **Products:** Siemens Tecnomatix Plant Simulation
- **Versions:**
- V2201: All versions prior to V2201.0008
- V2302: All versions prior to V2302.0002
- **Configurations:** Vulnerable when reading specially crafted PAR, SPP, STP, PRT, and IGS files.
## Vulnerability Description
The application suffers from multiple memory corruption vulnerabilities arising during the parsing of specific proprietary file formats (PAR, SPP, STP, PRT, IGS). These flaws include Heap-based Buffer Overflows (CWE-122), Out-of-bounds Writes (CWE-787), Stack-based Buffer Overflows (CWE-121), and general Memory Corruption (CWE-119). Successful exploitation allows an attacker to crash the application or potentially execute arbitrary code within the context of the current process.
## Exploitation
- **Status:** PoC available (Implied by CVSS E:P rating, meaning Proof of Concept is available)
- **Complexity:** Low (AV:L, AC:L, UI:R - Requires local access or malicious file exchange, but low attack complexity once the file is introduced)
- **Attack Vector:** Local (AV:L) - Requires the user to open the malicious file.
## Impact
The worst-case impact, indicated by the high severity scores, is:
- **Confidentiality:** High (Potential information disclosure or system access via code execution)
- **Integrity:** High (Potential modification of system state/data via code execution)
- **Availability:** High (Guaranteed crash/denial of service upon successful file processing)
## Remediation
### Patches
Customers must update to the following versions or later:
- **Tecnomatix Plant Simulation V2201:** Update to **V2201.0008** or later.
- **Tecnomatix Plant Simulation V2302:** Update to **V2302.0002** or later.
### Workarounds
- Do not open untrusted PAR, SPP, STP, or PRT files received from unknown or unverified sources.
- Follow general industrial security best practices and operational guidelines provided by Siemens.
## Detection
- **Indicators of Compromise:** Application crashes during file loading/processing of specific file types (PAR, SPP, STP, PRT, IGS).
- **Detection Methods and Tools:** Monitoring file integrity and application crash logs related to Tecnomatix Plant Simulation during known file processing events. Deep packet inspection may detect unusual file transfers if the malicious file is received over the network.
## References
- Siemens Security Advisory SSA-764801
- Vendor Advisory Link: hxxps://cert-portal.siemens.com/productcert/html/ssa-764801.html
- Industrial Security Guidelines: hxxps://www.siemens.com/cert/operational-guidelines-industrial-security
- CWE Link: hxxps://cwe.mitre.org/