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Xext: Fix out of bounds access in SProcScreenSaverSuspend()

Browse source 
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 <povilas@radix.lt>
(cherry picked from commit 6c4c530107)
This commit is contained in:
Povilas Kanapickas 2021-12-14 15:00:02 +02:00 • committed by Olivier Fourdan
parent 3eb5445f6f
commit fe0c050276
1 changed files with 1 additions and 1 deletions
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2
Xext/saver.c
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@ -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);
}