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Red Hat: RHSA-2014:1870-01 Critical libXfont Flaws Resolved

red hat
Calendar Grey November 18, 2014
Dist Redhat Esm H88
Critical security advisory for libXfont on Red Hat addresses multiple important vulnerabilities.
Updated libXfont packages that fix three security issues are now available for Red Hat Enterprise Linux 6 and 7

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

Summary

The libXfont packages provide the X.Org libXfont runtime library. X.Org is an open source implementation of the X Window System.
A use-after-free flaw was found in the way libXfont processed certain font files when attempting to add a new directory to the font path. A malicious, local user could exploit this issue to potentially execute arbitrary code with the privileges of the X.Org server. (CVE-2014-0209)
Multiple out-of-bounds write flaws were found in the way libXfont parsed replies received from an X.org font server. A malicious X.org server could cause an X client to crash or, possibly, execute arbitrary code with the privileges of the X.Org server. (CVE-2014-0210, CVE-2014-0211)
Red Hat would like to thank the X.org project for reporting these issues. Upstream acknowledges Ilja van Sprundel as the original reporter.
Users of libXfont should upgrade to these updated packages, which contain a backported patch to resolve this issue. All running X.Org server instances must be restarted for the update to take effect.

Topics%20covered

Topics Covered

security advisory critical package update Red Hat Enterprise Linux out-of-bounds use-after-free libXfont

References

https://access.redhat.com/security/cve/CVE-2014-0209 https://access.redhat.com/security/cve/CVE-2014-0210 https://access.redhat.com/security/cve/CVE-2014-0211 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: libXfont-1.4.5-4.el6_6.src.rpm
i386: libXfont-1.4.5-4.el6_6.i686.rpm libXfont-debuginfo-1.4.5-4.el6_6.i686.rpm
x86_64: libXfont-1.4.5-4.el6_6.x86_64.rpm libXfont-debuginfo-1.4.5-4.el6_6.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386: libXfont-debuginfo-1.4.5-4.el6_6.i686.rpm libXfont-devel-1.4.5-4.el6_6.i686.rpm
x86_64: libXfont-1.4.5-4.el6_6.i686.rpm libXfont-debuginfo-1.4.5-4.el6_6.i686.rpm libXfont-debuginfo-1.4.5-4.el6_6.x86_64.rpm libXfont-devel-1.4.5-4.el6_6.i686.rpm libXfont-devel-1.4.5-4.el6_6.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: libXfont-1.4.5-4.el6_6.src.rpm
x86_64: libXfont-1.4.5-4.el6_6.x86_64.rpm libXfont-debuginfo-1.4.5-4.el6_6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64: libXfont-1.4.5-4.el6_6.i686.rpm libXfont-debuginfo-1.4.5-4.el6_6.i686.rpm libXfont-debuginfo-1.4.5-4.el6_6.x86_64.rpm libXfont-devel-1.4.5-4.el6_6.i686.rpm libXfont-devel-1.4.5-4.el6_6.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source: libXfont-1.4.5-4.el6_6.src.rpm
i386: libXfont-1.4.5-4.el6_6.i686.rpm libXfont-debuginfo-1.4.5-4.el6_6.i686.rpm
ppc64: libXfont-1.4.5-4.el6_6.ppc64.rpm libXfont-debuginfo-1.4.5-4.el6_6.ppc64.rpm
s390x: libXfont-1.4.5-4.el6_6.s390x.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2014:1870-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2014:1870.html
Issue date: 2014-11-18

Topic

Updated libXfont packages that fix three security issues are now availablefor Red Hat Enterprise Linux 6 and 7.Red Hat Product Security has rated this update as having Important securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.

Topics%20covered

Topics Covered

security advisory critical package update Red Hat Enterprise Linux out-of-bounds use-after-free libXfont

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1096593 - CVE-2014-0209 libXfont: integer overflow of allocations in font metadata file parsing

1096597 - CVE-2014-0210 libXfont: unvalidated length fields when parsing xfs protocol replies

1096601 - CVE-2014-0211 libXfont: integer overflows calculating memory needs for xfs replies

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