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- U_libXfont_LZW-decompress-fix-for-CVE-2011-2895.patch

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* LZW decompress: fix for CVE-2011-2895 (bnc #709851)

OBS-URL: https://build.opensuse.org/package/show/X11:XOrg/xorg-x11-libs?expand=0&rev=168
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Stefan Dirsch 2011-09-02 13:53:13 +00:00 committed by Git OBS Bridge
parent 78d354418c
commit dfc8bdecf3
3 changed files with 42 additions and 0 deletions
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32
U_libXfont_LZW-decompress-fix-for-CVE-2011-2895.patch Normal file
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@ -0,0 +1,32 @@
From d11ee5886e9d9ec610051a206b135a4cdc1e09a0 Mon Sep 17 00:00:00 2001
From: Thomas Hoger <thoger@redhat.com>
Date: Mon, 8 Aug 2011 18:03:09 +0200
Subject: [PATCH] LZW decompress: fix for CVE-2011-2895
Specially crafted LZW stream can crash an application using libXfont
that is used to open untrusted font files. With X server, this may
allow privilege escalation when exploited
Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr>
Signed-off-by: Matthieu Herrb <matthieu.herrb@laas.fr>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
---
src/fontfile/decompress.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/src/fontfile/decompress.c b/src/fontfile/decompress.c
index b1fc37b..c8171dd 100644
--- a/src/fontfile/decompress.c
+++ b/src/fontfile/decompress.c
@@ -259,6 +259,8 @@ BufCompressedFill (BufFilePtr f)
*/
while ( code >= 256 )
{
+ if (stackp - de_stack >= STACK_SIZE - 1)
+ return BUFFILEEOF;
*stackp++ = file->tab_suffix[code];
code = file->tab_prefix[code];
}
--
1.7.4.1

6
xorg-x11-libs.changes
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@ -1,3 +1,9 @@
-------------------------------------------------------------------
Fri Sep 2 13:39:04 UTC 2011 - sndirsch@suse.com
- U_libXfont_LZW-decompress-fix-for-CVE-2011-2895.patch
* LZW decompress: fix for CVE-2011-2895 (bnc #709851)
-------------------------------------------------------------------
Tue Aug 30 13:04:47 UTC 2011 - sndirsch@suse.com

4
xorg-x11-libs.spec
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@ -72,6 +72,7 @@ Source90: baselibs.conf
Patch2: libXft-2.1.7-lcd-filter-2.patch
Patch5: libxkbui.diff
Patch10: libXxf86misc-xcb.diff
Patch11: U_libXfont_LZW-decompress-fix-for-CVE-2011-2895.patch
%description
This package contains the remaining X.Org libraries.
@ -156,6 +157,9 @@ popd
pushd libXxf86misc-*
%patch10 -p0
popd
pushd libXfont-*
%patch11 -p1
popd
%build
for dir in $(ls); do