From 67425fcab50ef24a5617e109897f38876dd81277 Mon Sep 17 00:00:00 2001 From: Povilas Kanapickas Date: Tue, 14 Dec 2021 15:00:02 +0200 Subject: [PATCH xserver 3/4] Xext: Fix out of bounds access in SProcScreenSaverSuspend() ZDI-CAN-14951, CVE-2021-4010 This vulnerability was discovered and the fix was suggested by: Jan-Niklas Sohn working with Trend Micro Zero Day Initiative Signed-off-by: Povilas Kanapickas (cherry picked from commit 6c4c53010772e3cb4cb8acd54950c8eec9c00d21) --- Xext/saver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Xext/saver.c b/Xext/saver.c index c27a66c80..c23907dbb 100644 --- a/Xext/saver.c +++ b/Xext/saver.c @@ -1351,8 +1351,8 @@ SProcScreenSaverSuspend(ClientPtr client) REQUEST(xScreenSaverSuspendReq); swaps(&stuff->length); - swapl(&stuff->suspend); REQUEST_SIZE_MATCH(xScreenSaverSuspendReq); + swapl(&stuff->suspend); return ProcScreenSaverSuspend(client); } -- 2.33.1