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Red Hat Security Advisory 2014-1388-02

Red Hat Security Advisory 2014-1388-02
Posted Oct 14, 2014
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2014-1388-02 - CUPS provides a portable printing layer for Linux, UNIX, and similar operating systems. A cross-site scripting flaw was found in the CUPS web interface. An attacker could use this flaw to perform a cross-site scripting attack against users of the CUPS web interface. It was discovered that CUPS allowed certain users to create symbolic links in certain directories under /var/cache/cups/. A local user with the 'lp' group privileges could use this flaw to read the contents of arbitrary files on the system or, potentially, escalate their privileges on the system.

tags | advisory, web, arbitrary, local, xss
systems | linux, redhat, unix
advisories | CVE-2014-2856, CVE-2014-3537, CVE-2014-5029, CVE-2014-5030, CVE-2014-5031
SHA-256 | f40db663647458b2845b3f1ac29ff57140997773dd6238d70c6eb62820776ebf

Red Hat Security Advisory 2014-1388-02

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=====================================================================
Red Hat Security Advisory

Synopsis: Moderate: cups security and bug fix update
Advisory ID: RHSA-2014:1388-02
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-1388.html
Issue date: 2014-10-14
CVE Names: CVE-2014-2856 CVE-2014-3537 CVE-2014-5029
CVE-2014-5030 CVE-2014-5031
=====================================================================

1. Summary:

Updated cups packages that fix multiple security issues and several bugs
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, 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 Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

CUPS provides a portable printing layer for Linux, UNIX, and similar
operating systems.

A cross-site scripting (XSS) flaw was found in the CUPS web interface.
An attacker could use this flaw to perform a cross-site scripting attack
against users of the CUPS web interface. (CVE-2014-2856)

It was discovered that CUPS allowed certain users to create symbolic links
in certain directories under /var/cache/cups/. A local user with the 'lp'
group privileges could use this flaw to read the contents of arbitrary
files on the system or, potentially, escalate their privileges on the
system. (CVE-2014-3537, CVE-2014-5029, CVE-2014-5030, CVE-2014-5031)

The CVE-2014-3537 issue was discovered by Francisco Alonso of Red Hat
Product Security.

These updated cups packages also include several bug fixes. Space precludes
documenting all of these changes in this advisory. Users are directed to
the Red Hat Enterprise Linux 6.6 Technical Notes, linked to in the
References section, for information on the most significant of these
changes.

All cups users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. After installing this
update, the cupsd daemon will be restarted automatically.

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/):

978387 - Bad IPP responses with version 2.0 (collection handling bug)
1012482 - /etc/cron.daily/cups breaks rule GEN003080 in Red Hat security guide
1087122 - CVE-2014-2856 cups: cross-site scripting flaw fixed in the 1.7.2 release
1115576 - CVE-2014-3537 cups: insufficient checking leads to privilege escalation
1122600 - CVE-2014-5029 cups: Incomplete fix for CVE-2014-3537
1128764 - CVE-2014-5030 cups: allows local users to read arbitrary files via a symlink attack
1128767 - CVE-2014-5031 cups: world-readable permissions

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
cups-1.4.2-67.el6.src.rpm

i386:
cups-1.4.2-67.el6.i686.rpm
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-libs-1.4.2-67.el6.i686.rpm
cups-lpd-1.4.2-67.el6.i686.rpm

x86_64:
cups-1.4.2-67.el6.x86_64.rpm
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-debuginfo-1.4.2-67.el6.x86_64.rpm
cups-libs-1.4.2-67.el6.i686.rpm
cups-libs-1.4.2-67.el6.x86_64.rpm
cups-lpd-1.4.2-67.el6.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

i386:
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-devel-1.4.2-67.el6.i686.rpm
cups-php-1.4.2-67.el6.i686.rpm

x86_64:
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-debuginfo-1.4.2-67.el6.x86_64.rpm
cups-devel-1.4.2-67.el6.i686.rpm
cups-devel-1.4.2-67.el6.x86_64.rpm
cups-php-1.4.2-67.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
cups-1.4.2-67.el6.src.rpm

x86_64:
cups-1.4.2-67.el6.x86_64.rpm
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-debuginfo-1.4.2-67.el6.x86_64.rpm
cups-libs-1.4.2-67.el6.i686.rpm
cups-libs-1.4.2-67.el6.x86_64.rpm
cups-lpd-1.4.2-67.el6.x86_64.rpm

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

x86_64:
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-debuginfo-1.4.2-67.el6.x86_64.rpm
cups-devel-1.4.2-67.el6.i686.rpm
cups-devel-1.4.2-67.el6.x86_64.rpm
cups-php-1.4.2-67.el6.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
cups-1.4.2-67.el6.src.rpm

i386:
cups-1.4.2-67.el6.i686.rpm
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-devel-1.4.2-67.el6.i686.rpm
cups-libs-1.4.2-67.el6.i686.rpm
cups-lpd-1.4.2-67.el6.i686.rpm

ppc64:
cups-1.4.2-67.el6.ppc64.rpm
cups-debuginfo-1.4.2-67.el6.ppc.rpm
cups-debuginfo-1.4.2-67.el6.ppc64.rpm
cups-devel-1.4.2-67.el6.ppc.rpm
cups-devel-1.4.2-67.el6.ppc64.rpm
cups-libs-1.4.2-67.el6.ppc.rpm
cups-libs-1.4.2-67.el6.ppc64.rpm
cups-lpd-1.4.2-67.el6.ppc64.rpm

s390x:
cups-1.4.2-67.el6.s390x.rpm
cups-debuginfo-1.4.2-67.el6.s390.rpm
cups-debuginfo-1.4.2-67.el6.s390x.rpm
cups-devel-1.4.2-67.el6.s390.rpm
cups-devel-1.4.2-67.el6.s390x.rpm
cups-libs-1.4.2-67.el6.s390.rpm
cups-libs-1.4.2-67.el6.s390x.rpm
cups-lpd-1.4.2-67.el6.s390x.rpm

x86_64:
cups-1.4.2-67.el6.x86_64.rpm
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-debuginfo-1.4.2-67.el6.x86_64.rpm
cups-devel-1.4.2-67.el6.i686.rpm
cups-devel-1.4.2-67.el6.x86_64.rpm
cups-libs-1.4.2-67.el6.i686.rpm
cups-libs-1.4.2-67.el6.x86_64.rpm
cups-lpd-1.4.2-67.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

i386:
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-php-1.4.2-67.el6.i686.rpm

ppc64:
cups-debuginfo-1.4.2-67.el6.ppc64.rpm
cups-php-1.4.2-67.el6.ppc64.rpm

s390x:
cups-debuginfo-1.4.2-67.el6.s390x.rpm
cups-php-1.4.2-67.el6.s390x.rpm

x86_64:
cups-debuginfo-1.4.2-67.el6.x86_64.rpm
cups-php-1.4.2-67.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
cups-1.4.2-67.el6.src.rpm

i386:
cups-1.4.2-67.el6.i686.rpm
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-devel-1.4.2-67.el6.i686.rpm
cups-libs-1.4.2-67.el6.i686.rpm
cups-lpd-1.4.2-67.el6.i686.rpm

x86_64:
cups-1.4.2-67.el6.x86_64.rpm
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-debuginfo-1.4.2-67.el6.x86_64.rpm
cups-devel-1.4.2-67.el6.i686.rpm
cups-devel-1.4.2-67.el6.x86_64.rpm
cups-libs-1.4.2-67.el6.i686.rpm
cups-libs-1.4.2-67.el6.x86_64.rpm
cups-lpd-1.4.2-67.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

i386:
cups-debuginfo-1.4.2-67.el6.i686.rpm
cups-php-1.4.2-67.el6.i686.rpm

x86_64:
cups-debuginfo-1.4.2-67.el6.x86_64.rpm
cups-php-1.4.2-67.el6.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2014-2856.html
https://www.redhat.com/security/data/cve/CVE-2014-3537.html
https://www.redhat.com/security/data/cve/CVE-2014-5029.html
https://www.redhat.com/security/data/cve/CVE-2014-5030.html
https://www.redhat.com/security/data/cve/CVE-2014-5031.html
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.6_Technical_Notes/cups.html#RHSA-2014-1388

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2014 Red Hat, Inc.
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