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Category:   Application (Generic)  >   CUPS Vendors:   Easy Software Products
(Red Hat Issues Fix) CUPS Bugs Let Remote Users Gain Elevated Privileges and Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1032607
SecurityTracker URL:  http://securitytracker.com/id/1032607
CVE Reference:   CVE-2015-1158, CVE-2015-1159   (Links to External Site)
Date:  Jun 18 2015
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.0.3
Description:   Two vulnerabilities were reported in CUPS. A remote user can gain elevated privileges on the target system. A remote user can conduct cross-site scripting attacks.

A remote user can send specially crafted localized strings to cause the the 'admin/conf' and 'admin' access control lists to fail, granting the remote user full control of the target system [CVE-2015-1158]. Version 1.2.0 and later are affected.

The CUPS templating engine does not properly filter HTML code from user-supplied input before displaying the input [CVE-2015-1159]. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the CUPS web interface and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

The original advisory is available at:

https://www.kb.cert.org/vuls/id/810572

Google reported this vulnerability.

Impact:   A remote user can gain full control of the target system.

A remote user can access the target user's cookies (including authentication cookies), if any, associated with the CUPS web interface, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2015-1123.html

Vendor URL:  www.cups.org/blog.php?L1082 (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6, 7

Message History:   This archive entry is a follow-up to the message listed below.
Jun 10 2015 CUPS Bugs Let Remote Users Gain Elevated Privileges and Conduct Cross-Site Scripting Attacks



 Source Message Contents

Subject:  [RHSA-2015:1123-01] Important: cups security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

Synopsis:          Important: cups security update
Advisory ID:       RHSA-2015:1123-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-1123.html
Issue date:        2015-06-17
CVE Names:         CVE-2014-9679 CVE-2015-1158 CVE-2015-1159 
=====================================================================

1. Summary:

Updated cups packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 6 and 7.

Red Hat Product Security has rated this update as having Important 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 Client (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, 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) - noarch, ppc64, ppc64le, 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, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

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

A string reference count bug was found in cupsd, causing premature freeing
of string objects. An attacker can submit a malicious print job that
exploits this flaw to dismantle ACLs protecting privileged operations,
allowing a replacement configuration file to be uploaded which in turn
allows the attacker to run arbitrary code in the CUPS server
(CVE-2015-1158)

A cross-site scripting flaw was found in the cups web templating engine. An
attacker could use this flaw to bypass the default configuration settings 
that bind the CUPS scheduler to the 'localhost' or loopback interface.
(CVE-2015-1159)

An integer overflow leading to a heap-based buffer overflow was found in
the way cups handled compressed raster image files. An attacker could
create a specially-crafted image file, which when passed via the cups
Raster filter, could cause the cups filter to crash. (CVE-2014-9679)

Red Hat would like to thank the CERT/CC for reporting CVE-2015-1158 and 
CVE-2015-1159 issues.

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.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

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

1191588 - CVE-2014-9679 cups: cupsRasterReadPixels buffer overflow
1221641 - CVE-2015-1158 cups: incorrect string reference counting (VU#810572)
1221642 - CVE-2015-1159 cups: cross-site scripting flaw in CUPS web UI (VU#810572)

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
cups-1.4.2-67.el6_6.1.src.rpm

i386:
cups-1.4.2-67.el6_6.1.i686.rpm
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-libs-1.4.2-67.el6_6.1.i686.rpm
cups-lpd-1.4.2-67.el6_6.1.i686.rpm

x86_64:
cups-1.4.2-67.el6_6.1.x86_64.rpm
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-debuginfo-1.4.2-67.el6_6.1.x86_64.rpm
cups-libs-1.4.2-67.el6_6.1.i686.rpm
cups-libs-1.4.2-67.el6_6.1.x86_64.rpm
cups-lpd-1.4.2-67.el6_6.1.x86_64.rpm

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

i386:
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-devel-1.4.2-67.el6_6.1.i686.rpm
cups-php-1.4.2-67.el6_6.1.i686.rpm

x86_64:
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-debuginfo-1.4.2-67.el6_6.1.x86_64.rpm
cups-devel-1.4.2-67.el6_6.1.i686.rpm
cups-devel-1.4.2-67.el6_6.1.x86_64.rpm
cups-php-1.4.2-67.el6_6.1.x86_64.rpm

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

Source:
cups-1.4.2-67.el6_6.1.src.rpm

x86_64:
cups-1.4.2-67.el6_6.1.x86_64.rpm
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-debuginfo-1.4.2-67.el6_6.1.x86_64.rpm
cups-libs-1.4.2-67.el6_6.1.i686.rpm
cups-libs-1.4.2-67.el6_6.1.x86_64.rpm
cups-lpd-1.4.2-67.el6_6.1.x86_64.rpm

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

x86_64:
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-debuginfo-1.4.2-67.el6_6.1.x86_64.rpm
cups-devel-1.4.2-67.el6_6.1.i686.rpm
cups-devel-1.4.2-67.el6_6.1.x86_64.rpm
cups-php-1.4.2-67.el6_6.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
cups-1.4.2-67.el6_6.1.src.rpm

i386:
cups-1.4.2-67.el6_6.1.i686.rpm
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-devel-1.4.2-67.el6_6.1.i686.rpm
cups-libs-1.4.2-67.el6_6.1.i686.rpm
cups-lpd-1.4.2-67.el6_6.1.i686.rpm

ppc64:
cups-1.4.2-67.el6_6.1.ppc64.rpm
cups-debuginfo-1.4.2-67.el6_6.1.ppc.rpm
cups-debuginfo-1.4.2-67.el6_6.1.ppc64.rpm
cups-devel-1.4.2-67.el6_6.1.ppc.rpm
cups-devel-1.4.2-67.el6_6.1.ppc64.rpm
cups-libs-1.4.2-67.el6_6.1.ppc.rpm
cups-libs-1.4.2-67.el6_6.1.ppc64.rpm
cups-lpd-1.4.2-67.el6_6.1.ppc64.rpm

s390x:
cups-1.4.2-67.el6_6.1.s390x.rpm
cups-debuginfo-1.4.2-67.el6_6.1.s390.rpm
cups-debuginfo-1.4.2-67.el6_6.1.s390x.rpm
cups-devel-1.4.2-67.el6_6.1.s390.rpm
cups-devel-1.4.2-67.el6_6.1.s390x.rpm
cups-libs-1.4.2-67.el6_6.1.s390.rpm
cups-libs-1.4.2-67.el6_6.1.s390x.rpm
cups-lpd-1.4.2-67.el6_6.1.s390x.rpm

x86_64:
cups-1.4.2-67.el6_6.1.x86_64.rpm
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-debuginfo-1.4.2-67.el6_6.1.x86_64.rpm
cups-devel-1.4.2-67.el6_6.1.i686.rpm
cups-devel-1.4.2-67.el6_6.1.x86_64.rpm
cups-libs-1.4.2-67.el6_6.1.i686.rpm
cups-libs-1.4.2-67.el6_6.1.x86_64.rpm
cups-lpd-1.4.2-67.el6_6.1.x86_64.rpm

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

i386:
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-php-1.4.2-67.el6_6.1.i686.rpm

ppc64:
cups-debuginfo-1.4.2-67.el6_6.1.ppc64.rpm
cups-php-1.4.2-67.el6_6.1.ppc64.rpm

s390x:
cups-debuginfo-1.4.2-67.el6_6.1.s390x.rpm
cups-php-1.4.2-67.el6_6.1.s390x.rpm

x86_64:
cups-debuginfo-1.4.2-67.el6_6.1.x86_64.rpm
cups-php-1.4.2-67.el6_6.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
cups-1.4.2-67.el6_6.1.src.rpm

i386:
cups-1.4.2-67.el6_6.1.i686.rpm
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-devel-1.4.2-67.el6_6.1.i686.rpm
cups-libs-1.4.2-67.el6_6.1.i686.rpm
cups-lpd-1.4.2-67.el6_6.1.i686.rpm

x86_64:
cups-1.4.2-67.el6_6.1.x86_64.rpm
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-debuginfo-1.4.2-67.el6_6.1.x86_64.rpm
cups-devel-1.4.2-67.el6_6.1.i686.rpm
cups-devel-1.4.2-67.el6_6.1.x86_64.rpm
cups-libs-1.4.2-67.el6_6.1.i686.rpm
cups-libs-1.4.2-67.el6_6.1.x86_64.rpm
cups-lpd-1.4.2-67.el6_6.1.x86_64.rpm

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

i386:
cups-debuginfo-1.4.2-67.el6_6.1.i686.rpm
cups-php-1.4.2-67.el6_6.1.i686.rpm

x86_64:
cups-debuginfo-1.4.2-67.el6_6.1.x86_64.rpm
cups-php-1.4.2-67.el6_6.1.x86_64.rpm

Red Hat Enterprise Linux Client (v. 7):

Source:
cups-1.6.3-17.el7_1.1.src.rpm

noarch:
cups-filesystem-1.6.3-17.el7_1.1.noarch.rpm

x86_64:
cups-1.6.3-17.el7_1.1.x86_64.rpm
cups-client-1.6.3-17.el7_1.1.x86_64.rpm
cups-debuginfo-1.6.3-17.el7_1.1.i686.rpm
cups-debuginfo-1.6.3-17.el7_1.1.x86_64.rpm
cups-libs-1.6.3-17.el7_1.1.i686.rpm
cups-libs-1.6.3-17.el7_1.1.x86_64.rpm
cups-lpd-1.6.3-17.el7_1.1.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
cups-debuginfo-1.6.3-17.el7_1.1.i686.rpm
cups-debuginfo-1.6.3-17.el7_1.1.x86_64.rpm
cups-devel-1.6.3-17.el7_1.1.i686.rpm
cups-devel-1.6.3-17.el7_1.1.x86_64.rpm
cups-ipptool-1.6.3-17.el7_1.1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
cups-1.6.3-17.el7_1.1.src.rpm

noarch:
cups-filesystem-1.6.3-17.el7_1.1.noarch.rpm

x86_64:
cups-1.6.3-17.el7_1.1.x86_64.rpm
cups-client-1.6.3-17.el7_1.1.x86_64.rpm
cups-debuginfo-1.6.3-17.el7_1.1.i686.rpm
cups-debuginfo-1.6.3-17.el7_1.1.x86_64.rpm
cups-libs-1.6.3-17.el7_1.1.i686.rpm
cups-libs-1.6.3-17.el7_1.1.x86_64.rpm
cups-lpd-1.6.3-17.el7_1.1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
cups-debuginfo-1.6.3-17.el7_1.1.i686.rpm
cups-debuginfo-1.6.3-17.el7_1.1.x86_64.rpm
cups-devel-1.6.3-17.el7_1.1.i686.rpm
cups-devel-1.6.3-17.el7_1.1.x86_64.rpm
cups-ipptool-1.6.3-17.el7_1.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
cups-1.6.3-17.el7_1.1.src.rpm

noarch:
cups-filesystem-1.6.3-17.el7_1.1.noarch.rpm

ppc64:
cups-1.6.3-17.el7_1.1.ppc64.rpm
cups-client-1.6.3-17.el7_1.1.ppc64.rpm
cups-debuginfo-1.6.3-17.el7_1.1.ppc.rpm
cups-debuginfo-1.6.3-17.el7_1.1.ppc64.rpm
cups-devel-1.6.3-17.el7_1.1.ppc.rpm
cups-devel-1.6.3-17.el7_1.1.ppc64.rpm
cups-libs-1.6.3-17.el7_1.1.ppc.rpm
cups-libs-1.6.3-17.el7_1.1.ppc64.rpm
cups-lpd-1.6.3-17.el7_1.1.ppc64.rpm

s390x:
cups-1.6.3-17.el7_1.1.s390x.rpm
cups-client-1.6.3-17.el7_1.1.s390x.rpm
cups-debuginfo-1.6.3-17.el7_1.1.s390.rpm
cups-debuginfo-1.6.3-17.el7_1.1.s390x.rpm
cups-devel-1.6.3-17.el7_1.1.s390.rpm
cups-devel-1.6.3-17.el7_1.1.s390x.rpm
cups-libs-1.6.3-17.el7_1.1.s390.rpm
cups-libs-1.6.3-17.el7_1.1.s390x.rpm
cups-lpd-1.6.3-17.el7_1.1.s390x.rpm

x86_64:
cups-1.6.3-17.el7_1.1.x86_64.rpm
cups-client-1.6.3-17.el7_1.1.x86_64.rpm
cups-debuginfo-1.6.3-17.el7_1.1.i686.rpm
cups-debuginfo-1.6.3-17.el7_1.1.x86_64.rpm
cups-devel-1.6.3-17.el7_1.1.i686.rpm
cups-devel-1.6.3-17.el7_1.1.x86_64.rpm
cups-libs-1.6.3-17.el7_1.1.i686.rpm
cups-libs-1.6.3-17.el7_1.1.x86_64.rpm
cups-lpd-1.6.3-17.el7_1.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
cups-1.6.3-17.ael7b_1.1.src.rpm

noarch:
cups-filesystem-1.6.3-17.ael7b_1.1.noarch.rpm

ppc64le:
cups-1.6.3-17.ael7b_1.1.ppc64le.rpm
cups-client-1.6.3-17.ael7b_1.1.ppc64le.rpm
cups-debuginfo-1.6.3-17.ael7b_1.1.ppc64le.rpm
cups-devel-1.6.3-17.ael7b_1.1.ppc64le.rpm
cups-libs-1.6.3-17.ael7b_1.1.ppc64le.rpm
cups-lpd-1.6.3-17.ael7b_1.1.ppc64le.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
cups-debuginfo-1.6.3-17.el7_1.1.ppc64.rpm
cups-ipptool-1.6.3-17.el7_1.1.ppc64.rpm

s390x:
cups-debuginfo-1.6.3-17.el7_1.1.s390x.rpm
cups-ipptool-1.6.3-17.el7_1.1.s390x.rpm

x86_64:
cups-debuginfo-1.6.3-17.el7_1.1.x86_64.rpm
cups-ipptool-1.6.3-17.el7_1.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64le:
cups-debuginfo-1.6.3-17.ael7b_1.1.ppc64le.rpm
cups-ipptool-1.6.3-17.ael7b_1.1.ppc64le.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
cups-1.6.3-17.el7_1.1.src.rpm

noarch:
cups-filesystem-1.6.3-17.el7_1.1.noarch.rpm

x86_64:
cups-1.6.3-17.el7_1.1.x86_64.rpm
cups-client-1.6.3-17.el7_1.1.x86_64.rpm
cups-debuginfo-1.6.3-17.el7_1.1.i686.rpm
cups-debuginfo-1.6.3-17.el7_1.1.x86_64.rpm
cups-devel-1.6.3-17.el7_1.1.i686.rpm
cups-devel-1.6.3-17.el7_1.1.x86_64.rpm
cups-libs-1.6.3-17.el7_1.1.i686.rpm
cups-libs-1.6.3-17.el7_1.1.x86_64.rpm
cups-lpd-1.6.3-17.el7_1.1.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
cups-debuginfo-1.6.3-17.el7_1.1.x86_64.rpm
cups-ipptool-1.6.3-17.el7_1.1.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/

7. References:

https://access.redhat.com/security/cve/CVE-2014-9679
https://access.redhat.com/security/cve/CVE-2015-1158
https://access.redhat.com/security/cve/CVE-2015-1159
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2015 Red Hat, Inc.
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