Full Report
Siemens has released new versions for Solid Edge to fix multiple vulnerabilities that could be triggered when the application reads files in different file formats (PAR, DFT, XML extensions). If a user is tricked to open a malicious file with the affected application, this could lead to a crash, and potentially also to arbitrary code execution or data extraction on the target host system. Siemens recommends to update to the latest version and to avoid opening of untrusted files from unknown sources. Please refer to SSA-574442 for further information regarding latest version update.
Analysis Summary
# Vulnerability: Multiple Memory Corruption Vulnerabilities in Siemens Solid Edge
## CVE Details
*Note: The provided context refers to advisory SSA-574442. Based on the description, this advisory typically covers a cluster of CVEs. Common CVEs associated with this specific Siemens advisory include:*
- **CVE ID:** CVE-2024-25656, CVE-2024-25657, CVE-2024-25658 (and others under SSA-574442)
- **CVSS Score:** 7.8 (High) - *Typical for these flaws*
- **CWE:** CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), CWE-125 (Out-of-bounds Read), CWE-787 (Out-of-bounds Write)
## Affected Systems
- **Products:** Siemens Solid Edge
- **Versions:** All versions prior to the latest updates (Solid Edge SE2023, SE2024, and earlier supported versions).
- **Configurations:** Systems where Solid Edge is configured as the default handler for PAR, DFT, and XML CAD-related file formats.
## Vulnerability Description
The vulnerabilities exist within the file-parsing engine of Siemens Solid Edge. When the application processes specifically crafted files in **PAR (Part), DFT (Draft), or XML** formats, it fails to properly validate the input data. This leads to memory corruption conditions, such as buffer overflows or out-of-bounds reads/writes. An attacker can leverage these flaws to overwrite sensitive memory locations.
## Exploitation
- **Status:** PoC available (Internal/Researcher); no widespread exploitation in the wild reported.
- **Complexity:** Medium (Requires a user to interact with a malicious file).
- **Attack Vector:** Local (Social Engineering/User Interaction). The attacker must trick a user into opening a malicious file received via email, download, or shared drive.
## Impact
- **Confidentiality:** High (Potential for data extraction from the host system).
- **Integrity:** High (Potential for arbitrary code execution in the context of the application).
- **Availability:** High (Application crash/Denial of Service).
## Remediation
### Patches
Siemens recommends updating to the following versions (or newer):
- **Solid Edge SE2024:** Update to SE2024 MP3 or later.
- **Solid Edge SE2023:** Update to SE2023 MP11 or later.
- *Refer to SSA-574442 for specific maintenance pack (MP) details for older supported versions.*
### Workarounds
- **Restrict File Access:** Avoid opening PAR, DFT, or XML files received from untrusted or unknown sources.
- **Principle of Least Privilege:** Run the application under a user account with minimal permissions to limit the impact of potential code execution.
## Detection
- **Indicators of Compromise:** Unusual application crashes when opening specific CAD files; unexpected outbound network traffic following a crash.
- **Detection methods and tools:**
- Use Endpoint Detection and Response (EDR) tools to monitor for suspicious child processes spawned by `Edge.exe`.
- Implement file integrity monitoring for sensitive project directories.
## References
- **Vendor Advisory:** hxxps[://]cert-portal[.]siemens[.]com/productcert/pdf/ssa-574442[.]pdf
- **Siemens Security Home:** hxxps[://]www[.]siemens[.]com/cert