[reactos] 01/01: [MOUNTMGR] Fix pool memory disclosure in QueryPointsFromMemory (#3022)

[Nguyen Trung Khanh]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9adcacdbc82c243219d89…

commit 9adcacdbc82c243219d89165c3e03ed8c05b852f
Author:     Nguyen Trung Khanh <nguyentrungkhanh97(a)gmail.com>
AuthorDate: Mon Aug 17 21:45:35 2020 +0700
Commit:     GitHub <noreply(a)github.com>
CommitDate: Mon Aug 17 16:45:35 2020 +0200

    [MOUNTMGR] Fix pool memory disclosure in QueryPointsFromMemory (#3022)
---
 drivers/filters/mountmgr/point.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/filters/mountmgr/point.c b/drivers/filters/mountmgr/point.c
index 38260a57c2a..051f8305ece 100644
--- a/drivers/filters/mountmgr/point.c
+++ b/drivers/filters/mountmgr/point.c
@@ -335,6 +335,7 @@ QueryPointsFromMemory(IN PDEVICE_EXTENSION DeviceExtension,
     /* Now, ensure output buffer can hold everything */
     Stack = IoGetCurrentIrpStackLocation(Irp);
     MountPoints = (PMOUNTMGR_MOUNT_POINTS)Irp->AssociatedIrp.SystemBuffer;
+    RtlZeroMemory(MountPoints, Stack->Parameters.DeviceIoControl.OutputBufferLength);
 
     /* Ensure we set output to let user reallocate! */
     MountPoints->Size = sizeof(MOUNTMGR_MOUNT_POINTS) + TotalSymLinks *
sizeof(MOUNTMGR_MOUNT_POINT) + TotalSize;