6.8 - RHSA-2014:1436

Problem Description:

Updated X11 client libraries packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - noarch, x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, noarch, x86_64

3. Description:

The X11 (Xorg) libraries provide library routines that are used within all X Window applications.

Multiple integer overflow flaws, leading to heap-based buffer overflows, were found in the way various X11 client libraries handled certain protocol data. An attacker able to submit invalid protocol data to an X11 server via a malicious X11 client could use either of these flaws to potentially escalate their privileges on the system. (CVE-2013-1981, CVE-2013-1982, CVE-2013-1983, CVE-2013-1984, CVE-2013-1985, CVE-2013-1986, CVE-2013-1987, CVE-2013-1988, CVE-2013-1989, CVE-2013-1990, CVE-2013-1991, CVE-2013-2003, CVE-2013-2062, CVE-2013-2064)

Multiple array index errors, leading to heap-based buffer out-of-bounds write flaws, were found in the way various X11 client libraries handled data returned from an X11 server. A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client. (CVE-2013-1997, CVE-2013-1998, CVE-2013-1999, CVE-2013-2000, CVE-2013-2001, CVE-2013-2002, CVE-2013-2066)

A buffer overflow flaw was found in the way the XListInputDevices() function of X.Org X11's libXi runtime library handled signed numbers. A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client. (CVE-2013-1995)

A flaw was found in the way the X.Org X11 libXt runtime library used uninitialized pointers. A malicious X11 server could possibly use this flaw to execute arbitrary code with the privileges of the user running an X11 client. (CVE-2013-2005)

Two stack-based buffer overflow flaws were found in the way libX11, the Core X11 protocol client library, processed certain user-specified files. A malicious X11 server could possibly use this flaw to crash an X11 client via a specially crafted file. (CVE-2013-2004)

The xkeyboard-config package has been upgraded to upstream version 2.11, which provides a number of bug fixes and enhancements over the previous version. (BZ#1077471)

This update also fixes the following bugs:

* Previously, updating the mesa-libGL package did not update the libX11 package, although it was listed as a dependency of mesa-libGL. This bug has been fixed and updating mesa-libGL now updates all dependent packages as expected. (BZ#1054614)

* Previously, closing a customer application could occasionally cause the X Server to terminate unexpectedly. After this update, the X Server no longer hangs when a user closes a customer application. (BZ#971626)

All X11 client libraries users are advised to upgrade to these updated packages, which correct these issues and add these enhancements.

4. Solution:

Before applying this update, make sure all previously released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

959040 - CVE-2013-1981 libX11: Multiple integer overflows leading to heap-based buffer-overflows 959046 - CVE-2013-1982 libXext: Multiple integer overflows leading to heap-based buffer-overflows 959048 - CVE-2013-1983 libXfixes: Integer overflow leading to heap-based buffer overflow 959049 - CVE-2013-1984 libXi: Multiple integer overflows leading to heap-based buffer-overflows 959056 - CVE-2013-1985 libXinerama: Integer overflow leading to heap-based buffer overflow 959059 - CVE-2013-1986 libXrandr: Multiple integer overflows leading to heap-based bufer overflows 959061 - CVE-2013-1987 libXrender: Multiple integer overflows leading to heap-based bufer overflows 959066 - CVE-2013-1988 libXRes: Multiple integer overflows leading to heap-based bufer overflows 959068 - CVE-2013-1989 libXv: Multiple integer overflows leading to heap-based bufer overflows 959070 - CVE-2013-1990 libXvMC: Multiple integer overflows leading to heap-based buffer overflows 959072 - CVE-2013-1991 libXxf86dga: Multiple integer overflows leading to heap-based buffer overflows 959077 - CVE-2013-2003 libXcursor: Integer overflow leading to heap-based buffer overflow 959108 - CVE-2013-2005 libXt: Memory corruption due to unchecked use of unchecked function pointers 959112 - CVE-2013-2004 libX11: unbounded recursion leading to stack-overflow 960345 - CVE-2013-1997 libX11: Multiple Array Index error leading to heap-based OOB write 960346 - CVE-2013-1998 libXi: Multiple Array Index error leading to heap-based OOB write 960347 - CVE-2013-1999 libXvMC: Array Index error leading to heap-based OOB write 960349 - CVE-2013-2000 libXxf86dga: Array Index error leading to heap-based OOB write 960350 - CVE-2013-2001 libXxf86vm: Multiple Array Index error leading to heap-based OOB write 960352 - CVE-2013-2002 libXt: Array Index error leading to heap-based OOB write 960357 - CVE-2013-1995 libXi: Sign extension issues resulting in heap-based buffer overflow 960362 - CVE-2013-2062 libXp: Integer overflow leading to heap-based buffer overflow 960367 - CVE-2013-2064 libxcb: Integer overflow leading to heap-based buffer overflow 960369 - CVE-2013-2066 libXv: Array Index error leading to heap-based OOB write 971626 - Closing an in-house app can occasionally hang the X server 1119322 - %{dist} found instead of %{?dist} in: libXi-1.7.2-2.1.el6.src.rpm.spec