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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 <povilas@radix.lt>
(cherry picked from commit 6c4c530107)
This commit is contained in:
Povilas Kanapickas 2021-12-15 10:41:20 +02:00
parent 6f09e7d391
commit 7209982d2a
1 changed files with 1 additions and 1 deletions
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2
Xext/saver.c
View File

@ -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);
}