xserver-xorg: fix CVE-2020-14347

Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2020-14347.patch b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2020-14347.patch
new file mode 100644
index 0000000000..cf3f5f9417
--- /dev/null
+++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2020-14347.patch
@@ -0,0 +1,38 @@
+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>
+
+
+Upstream-Status: Backport [https://gitlab.freedesktop.org/xorg/xserver/-/commit/aac28e162e5108510065ad4c323affd6deffd816]
+CVE: CVE-2020-14347
+Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
+---
+ 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
+