CVE-2026-21674: iccDEV库XML MPE解析路径内存泄漏漏洞

// CVE-2026-21674 PoC - Malicious XML ICC Profile triggering memory leak // This PoC demonstrates a crafted XML ICC profile that triggers memory leak // in iccDEV library's iccFromXml function during MPE parsing. #include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated malicious XML MPE content const char* malicious_xml_mpe = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" "<ICCProfile version=\"4.3\">" " <MPE xmlns=\"http://www.color.org/ICC/MPE\">" " <CurveElement> " <Curve count=\"256\">" " <!— Repeated elements to trigger leak condition —>" " </Curve>" " </CurveElement>" " </MPE>" "</ICCProfile>"; // Simulate iccFromXml function with memory leak void trigger_iccFromXml_memory_leak(const char* xml_data) { void* leaked_memory = NULL; // Allocate memory for parsing (simulated) leaked_memory = malloc(1024); if (leaked_memory == NULL) { return; } // Parse XML MPE elements // In vulnerable version: memory not freed on error path printf("Parsing XML MPE data...\n"); // Simulate error condition where cleanup is skipped int parse_error = 1; // Simulated error if (parse_error) { // VULNERABILITY: Memory leak - leaked_memory not freed printf("Memory leak triggered: 1024 bytes not freed\n"); // Missing: free(leaked_memory); return; } free(leaked_memory); } int main() { printf("CVE-2026-21674 PoC - iccDEV Memory Leak\n"); printf("=====================================\n\n"); // Trigger the vulnerability trigger_iccFromXml_memory_leak(malicious_xml_mpe); printf("\nPoC demonstrates memory leak in XML MPE parsing.\n"); printf("Fixed in version 2.3.1.1\n"); return 0; }