CVE-2026-20815 Windows camsvc服务竞态条件本地权限提升漏洞

// CVE-2026-20815 PoC - Race Condition in camsvc // This PoC demonstrates the concept of exploiting a race condition // Requires: Local access with low privilege account #include <windows.h> #include <stdio.h> #include <threads.h> #define MAX_ATTEMPTS 10000 // Simulated vulnerable function BOOL VulnerableOperation() { // Simulating shared resource access without proper locking static BOOL resource_in_use = FALSE; if (resource_in_use) { // Race window - attacker can exploit here return FALSE; } resource_in_use = TRUE; // Small delay creates race condition window Sleep(1); // Attacker can manipulate state during this window resource_in_use = FALSE; return TRUE; } int RaceConditionThread(void* arg) { for (int i = 0; i < MAX_ATTEMPTS; i++) { if (VulnerableOperation()) { // Success - privilege escalation possible printf("Race condition won at attempt %d\n", i); return 1; } } return 0; } int main() { printf("CVE-2026-20815 camsvc Race Condition PoC\n"); printf("Target: Windows camsvc Service\n"); printf("Attempting race condition exploitation...\n"); // Create multiple threads to increase race condition probability thrd_t t1, t2, t3; thrd_create(&t1, RaceConditionThread, NULL); thrd_create(&t2, RaceConditionThread, NULL); thrd_create(&t3, RaceConditionThread, NULL); thrd_join(t1, &(int){0}); thrd_join(t2, &(int){0}); thrd_join(t3, &(int){0}); printf("PoC execution complete\n"); printf("Note: This is a conceptual PoC. Actual exploitation requires specific camsvc interaction.\n"); return 0; }