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[NTOS:PS] Fix stack memory disclosure in PsGetContextThread #3024

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Fix stack memory disclosure in PsGetContextThread.
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Nguyen Trung Khanh 2020-08-15 17:18:35 +07:00 • committed by GitHub
parent 49be08bc69
commit bc584bdf99
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1 changed files with 2 additions and 1 deletions
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3
ntoskrnl/ps/debug.c
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@ -112,7 +112,7 @@ PsGetContextThread(IN PETHREAD Thread,
/* Enter SEH */ /* Enter SEH */
_SEH2_TRY _SEH2_TRY
{ {
/* Set default ength */ /* Set default length */
Size = sizeof(CONTEXT); Size = sizeof(CONTEXT);
/* Read the flags */ /* Read the flags */
@ -146,6 +146,7 @@ PsGetContextThread(IN PETHREAD Thread,
KeInitializeEvent(&GetSetContext.Event, NotificationEvent, FALSE); KeInitializeEvent(&GetSetContext.Event, NotificationEvent, FALSE);
/* Set the flags and previous mode */ /* Set the flags and previous mode */
RtlZeroMemory(&GetSetContext.Context, Size);
GetSetContext.Context.ContextFlags = Flags; GetSetContext.Context.ContextFlags = Flags;
GetSetContext.Mode = PreviousMode; GetSetContext.Mode = PreviousMode;