CVE-2026-21494 iccDEV库CIccTagLut8::Validate()堆缓冲区溢出漏洞

#include <stdio.h> #include <stdlib.h> #include <string.h> // This is a conceptual PoC for CVE-2026-21494 // Heap buffer overflow in CIccTagLut8::Validate() // Target: iccDEV library versions < 2.3.1.2 /* To trigger this vulnerability: 1. Create or modify an ICC profile with a malformed LUT8 tag 2. The LUT8 tag data should have length fields that don't match 3. When CIccTagLut8::Validate() processes this data, it will read/write beyond allocated heap buffer boundaries The vulnerability occurs because Validate() doesn't properly check if the LUT data size matches the declared dimensions. Example malformed LUT8 data structure: - Input Table Length: 256 bytes allocated - Declared Input Entries: 512 (causing overflow read) - Output Table Length: 256 bytes allocated - Declared Output Entries: 512 (causing overflow write) Usage: 1. Generate a malicious ICC profile with this malformed LUT8 tag 2. Open the profile using any application using iccDEV library 3. The application will crash or potentially allow code execution */ int main() { printf("CVE-2026-21494 PoC - Conceptual demonstration\n"); printf("Target: iccDEV CIccTagLut8::Validate()\n"); printf("Vulnerability: Heap buffer overflow\n"); printf("\nThis PoC requires creating a malformed ICC profile\n"); printf("with oversized LUT8 tag data to trigger the overflow.\n"); return 0; }