CVE-2024-33492: Siemens Solid Edge SE2024 RCE Vulnerability

CVE-2024-33492 Overview

CVE-2024-33492 is an out-of-bounds read vulnerability in Siemens Solid Edge SE2024, affecting all versions prior to V224.0 Update 5. The flaw exists in the application's PAR file parser, which reads past the end of an allocated structure when processing specially crafted files. An attacker who convinces a user to open a malicious PAR file can execute code in the context of the Solid Edge process. The vulnerability is classified under CWE-125 (Out-of-Bounds Read) and requires local access with user interaction.

Critical Impact
Successful exploitation grants code execution within the Solid Edge process, potentially exposing engineering intellectual property and enabling lateral movement on engineering workstations.

Affected Products

Siemens Solid Edge SE2024 (all versions prior to V224.0 Update 5)
Siemens Solid Edge SE2024 V224.0 through Update 4
Engineering workstations running vulnerable Solid Edge installations

Discovery Timeline

2024-05-14 - Siemens publishes advisory SSA-589937
2024-05-14 - CVE-2024-33492 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-33492

Vulnerability Analysis

The vulnerability resides in the PAR file parsing logic used by Solid Edge SE2024. PAR files are Siemens' native part file format used to store 3D solid model data. When the parser processes a specially crafted PAR file, it reads memory past the end of an allocated structure. This out-of-bounds read leaks adjacent memory and, when combined with attacker-controlled data placement, can be steered into code execution within the current process. The issue is a memory safety defect in native code that trusts embedded size or offset fields without validating them against the actual allocation bounds.

Root Cause

The root cause is insufficient bounds checking during deserialization of PAR file structures. The parser uses length or offset values from the untrusted file to compute a read address without verifying the value against the allocated buffer size. This matches the [CWE-125] pattern of reading beyond the intended boundary of a buffer.

Attack Vector

Exploitation requires local access and user interaction. An attacker delivers a malicious .par file through email, shared engineering repositories, or removable media. When an engineer opens the file in Solid Edge, the parser triggers the out-of-bounds read. Because the process runs with the user's privileges, successful code execution inherits access to CAD assets, network shares, and any credentials cached by the workstation. The vulnerability cannot be triggered remotely without user interaction.

No verified proof-of-concept code has been published. Refer to the Siemens Security Advisory SSA-589937 for vendor technical details.

Detection Methods for CVE-2024-33492

Indicators of Compromise

Unexpected crashes of Edge.exe or Solid Edge helper processes when opening PAR files
PAR files received from untrusted senders or downloaded from untrusted repositories
Child processes spawned by Solid Edge that are not part of normal engineering workflows, such as cmd.exe, powershell.exe, or rundll32.exe
Outbound network connections initiated by the Solid Edge process to unfamiliar hosts

Detection Strategies

Monitor process creation events where the parent process is a Solid Edge binary and the child process is a scripting or shell interpreter
Alert on Solid Edge process crashes correlated with recent PAR file access in file system telemetry
Inspect email gateways and file transfer platforms for .par attachments originating from external or untrusted sources
Baseline normal Solid Edge behavior on engineering endpoints and flag deviations in module loads and network activity

Monitoring Recommendations

Enable command-line logging and PowerShell script block logging on engineering workstations to capture post-exploitation behavior
Forward endpoint telemetry, including image loads and process trees, to a centralized analytics platform for retrospective hunting
Track version inventory for Solid Edge installations to identify hosts still running builds prior to V224.0 Update 5

How to Mitigate CVE-2024-33492

Immediate Actions Required

Update Siemens Solid Edge SE2024 to V224.0 Update 5 or later on all affected workstations
Block or quarantine .par file attachments from external senders at email and web gateways until patching is complete
Restrict opening of PAR files to files sourced from trusted internal repositories with integrity controls
Inventory all Solid Edge installations and prioritize patching hosts handling sensitive intellectual property

Patch Information

Siemens has released Solid Edge SE2024 V224.0 Update 5, which addresses the out-of-bounds read in the PAR parser. Administrators should download the update from Siemens' official channels and validate deployment across all engineering endpoints. Full details are in Siemens Security Advisory SSA-589937.

Workarounds

Do not open PAR files received from untrusted or unverified sources
Apply application allowlisting to limit which processes Solid Edge can spawn, reducing the impact of code execution
Run Solid Edge under standard user accounts without local administrator rights to constrain post-exploitation activity
Segment engineering workstations from general corporate networks to limit lateral movement following compromise

bash

# Verify installed Solid Edge version on Windows
reg query "HKLM\SOFTWARE\Siemens\Solid Edge\Version 224\Application" /v Version

# Block PAR file execution via AppLocker file hash or path rules
# Example: restrict Solid Edge to open PAR files only from a trusted share