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package/x11r7/xserver_xorg-server: add security fix for CVE-2020-14347

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Release notes:
https://lists.x.org/archives/xorg-announce/2020-July/003051.html

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[Thomas: add IGNORE_CVES entry.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Bernd Kuhls 2020-08-10 08:41:09 +02:00 committed by Thomas Petazzoni
parent b37cfcbf9f
commit 8a46f3237a
2 changed files with 41 additions and 0 deletions
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36
package/x11r7/xserver_xorg-server/1.20.8/0007-fix-for-ZDI-11426.patch Normal file
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@ -0,0 +1,36 @@
From aac28e162e5108510065ad4c323affd6deffd816 Mon Sep 17 00:00:00 2001
From: Matthieu Herrb <matthieu@herrb.eu>
Date: Sat, 25 Jul 2020 19:33:50 +0200
Subject: [PATCH] fix for ZDI-11426
Avoid leaking un-initalized memory to clients by zeroing the
whole pixmap on initial allocation.
This vulnerability was discovered by:
Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[downloaded from upstream commit
https://gitlab.freedesktop.org/xorg/xserver/-/commit/aac28e162e5108510065ad4c323affd6deffd816]
---
dix/pixmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/dix/pixmap.c b/dix/pixmap.c
index 1186d7dbbf..5a0146bbb6 100644
--- a/dix/pixmap.c
+++ b/dix/pixmap.c
@@ -116,7 +116,7 @@ AllocatePixmap(ScreenPtr pScreen, int pixDataSize)
if (pScreen->totalPixmapSize > ((size_t) - 1) - pixDataSize)
return NullPixmap;
- pPixmap = malloc(pScreen->totalPixmapSize + pixDataSize);
+ pPixmap = calloc(1, pScreen->totalPixmapSize + pixDataSize);
if (!pPixmap)
return NullPixmap;
--
GitLab

5
package/x11r7/xserver_xorg-server/xserver_xorg-server.mk
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@ -38,6 +38,11 @@ XSERVER_XORG_SERVER_DEPENDENCIES = \
mcookie \
host-pkgconf
ifeq ($(BR2_PACKAGE_XSERVER_XORG_SERVER_V_1_20),y)
# 1.20.8/0007-fix-for-ZDI-11426.patch
XSERVER_XORG_SERVER_IGNORE_CVES += CVE-2020-14347
endif
# We force -O2 regardless of the optimization level chosen by the
# user, as the X.org server is known to trigger some compiler bugs at
# -Os on several architectures.