CVE-2025-20775 MediaTek显示组件Use After Free本地权限提升漏洞

// CVE-2025-20775 MediaTek Use After Free PoC (Conceptual) // This PoC demonstrates the vulnerability trigger mechanism #include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated display buffer structure struct display_buffer { void* data; size_t size; int flags; }; // Vulnerable function simulating use-after-free void process_display_buffer(struct display_buffer* buf) { // Free the buffer free(buf->data); // VULNERABILITY: Use after free - accessing freed memory // In real scenario, this could lead to arbitrary code execution if (buf->size > 0x1000) { printf("Large buffer detected\n"); // Attacker-controlled data could be read here memcpy(buf->data, "ATTACK", 6); } } int main() { printf("CVE-2025-20775 MediaTek Display UAF PoC\n"); printf("=====================================\n\n"); struct display_buffer* buf = malloc(sizeof(struct display_buffer)); buf->data = malloc(0x2000); buf->size = 0x2000; buf->flags = 0x01; printf("[*] Allocating display buffer at %p\n", buf->data); printf("[*] Triggering vulnerable code path...\n"); // Trigger the use-after-free process_display_buffer(buf); printf("[!] Use-after-free triggered successfully\n"); printf("[*] In real attack, this could lead to privilege escalation\n"); free(buf); return 0; } /* * Note: This is a conceptual PoC for educational purposes. * Actual exploitation requires: * 1. Target device with vulnerable MediaTek firmware * 2. Local access with system-level privileges * 3. Knowledge of specific display driver internals * 4. Ability to manipulate heap layout for exploitation */