[reactos] 13/30: [NTOS:EX] In NtSystemDebugControl, check for SeDebugPrivilege

[Hervé Poussineau]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=6338d513537a6872ef64c…

commit 6338d513537a6872ef64cbe59b453a5e15d0dcc7
Author:     Hervé Poussineau <hpoussin(a)reactos.org>
AuthorDate: Sat Sep 14 09:15:51 2024 +0200
Commit:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Tue Jan 28 22:00:39 2025 +0100

    [NTOS:EX] In NtSystemDebugControl, check for SeDebugPrivilege
---
 ntoskrnl/ex/dbgctrl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ntoskrnl/ex/dbgctrl.c b/ntoskrnl/ex/dbgctrl.c
index dbb47793ee5..c6553324a80 100644
--- a/ntoskrnl/ex/dbgctrl.c
+++ b/ntoskrnl/ex/dbgctrl.c
@@ -218,6 +218,10 @@ NtSystemDebugControl(
     ULONG Length = 0;
     NTSTATUS Status;
 
+    /* Debugger controlling requires the debug privilege */
+    if (!SeSinglePrivilegeCheck(SeDebugPrivilege, PreviousMode))
+        return STATUS_ACCESS_DENIED;
+
     _SEH2_TRY
     {
         if (PreviousMode != KernelMode)