CVE-2026-33317 OP-TEE越界读写漏洞

/* * Conceptual PoC for CVE-2026-33317 * Demonstrating the logic of triggering OOB Read/Write in entry_get_attribute_value */ #include <stdio.h> #include <stdint.h> #include <string.h> typedef struct { uint8_t* data; size_t size; } Template; // Simulated vulnerable function void vulnerable_get_attribute(Template* tpl, void* attr_data, size_t attr_len) { // Missing bounds check logic here // Real vulnerability: reads up to 7 bytes beyond template buffer // and writes attribute value beyond the end. printf("[+] Triggering OOB Read/Write...\n"); // Simulate OOB Write: Writing beyond the allocated buffer size // This corresponds to writing attribute value content memcpy(tpl->data + tpl->size + 2, attr_data, attr_len); printf("[+] Wrote %zu bytes beyond buffer boundary.\n", attr_len); } int main() { printf("CVE-2026-33317 PoC Simulation\n"); printf("Product: OP-TEE\n"); printf("Vulnerability: Out-of-bounds read/write in PKCS#11 TA\n\n"); // Setup a template buffer (simulating the TA heap allocation) uint8_t buffer[32]; Template tpl; tpl.data = buffer; tpl.size = sizeof(buffer); // Malicious attribute data to be written OOB uint8_t payload[] = {0x41, 0x42, 0x43, 0x44}; // "ABCD" // Call the vulnerable function with a bad template parameter // In a real attack, this is done via PKCS11_CMD_GET_ATTRIBUTE_VALUE vulnerable_get_attribute(&tpl, payload, sizeof(payload)); return 0; }