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.
lists.fedoraproject.org/pipermail/package-announce/2013-May/106752.html
lists.opensuse.org/opensuse-updates/2013-06/msg00137.html
www.debian.org/security/2013/dsa-2686
www.openwall.com/lists/oss-security/2013/05/23/3
www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
www.securityfocus.com/bid/60148
www.ubuntu.com/usn/USN-1855-1
www.x.org/wiki/Development/Security/Advisory-2013-05-23
www.x.org/wiki/Development/Security/Advisory-2013-05-23/
access.redhat.com/security/cve/CVE-2013-1992
access.redhat.com/security/cve/CVE-2013-2063
access.redhat.com/security/cve/CVE-2013-7439
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=1119322
bugzilla.redhat.com/show_bug.cgi?id=971626
rhn.redhat.com/errata/RHSA-2014-1436.html