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Update ipc.c

This commit is contained in:
DavidXanatos 2024-06-04 08:50:25 +02:00
parent d6fad0a140
commit 58e35a4c9f
1 changed files with 38 additions and 32 deletions
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70
Sandboxie/core/drv/ipc.c
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@ -1402,34 +1402,30 @@ _FX NTSTATUS Ipc_Api_DuplicateObject(PROCESS *proc, ULONG64 *parms)
} else if (IS_ARG_CURRENT_PROCESS(TargetProcessHandle)) {
//
// we duplicate the handle into kernel space such that that user
// won't be able to grab it while we are evaluaiting it
//
HANDLE SourceProcessKernelHandle;
status = Thread_GetKernelHandleForUserHandle(&SourceProcessKernelHandle, SourceProcessHandle);
if (NT_SUCCESS(status)) {
HANDLE TargetProcessKernelHandle = ZwCurrentProcess(); // TargetProcessHandle == NtCurrentProcess();
//
// driver verifier wants us to provide a kernel handle as process handles
// but the source handle must be a user handle and the ZwDuplicateObject
// function creates another user handle hence NtClose
//
status = ZwDuplicateObject(
SourceProcessKernelHandle, SourceHandle,
TargetProcessKernelHandle, &DuplicatedHandle,
DesiredAccess, HandleAttributes,
Options & ~DUPLICATE_CLOSE_SOURCE);
HANDLE SourceKernelHandle;
status = Thread_GetKernelHandleForUserHandle(&SourceKernelHandle, SourceHandle);
if (NT_SUCCESS(status)) {
status = Ipc_CheckObjectName(DuplicatedHandle, UserMode);
status = ZwDuplicateObject(
SourceProcessKernelHandle, SourceHandle,
TargetProcessKernelHandle, &DuplicatedHandle,
DesiredAccess, HandleAttributes,
Options & ~DUPLICATE_CLOSE_SOURCE);
NtClose(DuplicatedHandle);
if (NT_SUCCESS(status)) {
status = Ipc_CheckObjectName(DuplicatedHandle, UserMode);
NtClose(DuplicatedHandle);
}
ZwClose(SourceKernelHandle);
}
ZwClose(SourceProcessKernelHandle);
@ -1444,30 +1440,40 @@ _FX NTSTATUS Ipc_Api_DuplicateObject(PROCESS *proc, ULONG64 *parms)
if (NT_SUCCESS(status)) {
HANDLE SourceProcessKernelHandle = (HANDLE)-1;
HANDLE TargetProcessKernelHandle = (HANDLE)-1;
HANDLE SourceProcessKernelHandle = ZwCurrentProcess();
if (!IS_ARG_CURRENT_PROCESS(SourceProcessHandle))
status = Thread_GetKernelHandleForUserHandle(&SourceProcessKernelHandle, SourceProcessHandle);
if (NT_SUCCESS(status)) {
HANDLE TargetProcessKernelHandle = ZwCurrentProcess();
if (!IS_ARG_CURRENT_PROCESS(TargetProcessHandle))
status = Thread_GetKernelHandleForUserHandle(&TargetProcessKernelHandle, TargetProcessHandle);
if (NT_SUCCESS(status)) {
status = ZwDuplicateObject(
SourceProcessKernelHandle, SourceHandle,
TargetProcessKernelHandle, &DuplicatedHandle,
DesiredAccess, HandleAttributes, Options);
HANDLE SourceKernelHandle;
status = Thread_GetKernelHandleForUserHandle(&SourceKernelHandle, SourceHandle);
if (NT_SUCCESS(status)) {
*TargetHandle = DuplicatedHandle;
status = ZwDuplicateObject(
SourceProcessKernelHandle, SourceKernelHandle,
TargetProcessKernelHandle, &DuplicatedHandle,
DesiredAccess, HandleAttributes, Options & ~DUPLICATE_CLOSE_SOURCE);
if (Options & DUPLICATE_CLOSE_SOURCE)
NtClose(SourceHandle);
*TargetHandle = DuplicatedHandle;
ZwClose(SourceKernelHandle);
}
if (!IS_ARG_CURRENT_PROCESS(TargetProcessKernelHandle))
ZwClose(TargetProcessKernelHandle);
}
}
if (SourceProcessKernelHandle && !IS_ARG_CURRENT_PROCESS(SourceProcessKernelHandle))
ZwClose(SourceProcessKernelHandle);
if (TargetProcessKernelHandle && !IS_ARG_CURRENT_PROCESS(TargetProcessKernelHandle))
ZwClose(TargetProcessKernelHandle);
if (!IS_ARG_CURRENT_PROCESS(SourceProcessKernelHandle))
ZwClose(SourceProcessKernelHandle);
}
}
//