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ESB-2016.0390 - [UNIX/Linux][RedHat] polkit: Denial of service - Existing account

Date: 17 February 2016

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0390
                     Moderate: polkit security update
                             17 February 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           polkit
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 7
                   Red Hat Enterprise Linux WS/Desktop 7
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-3256  

Original Bulletin: 
   https://rhn.redhat.com/errata/RHSA-2016-0189.html

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Red Hat. It is recommended that administrators
         running polkit check for an updated version of the software for 
         their operating system.

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

Synopsis:          Moderate: polkit security update
Advisory ID:       RHSA-2016:0189-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2016-0189.html
Issue date:        2016-02-16
CVE Names:         CVE-2015-3256 
=====================================================================

1. Summary:

Updated polkit packages that fix one security issue are now available for
Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

3. Description:

PolicyKit is a toolkit for defining and handling authorizations.

A denial of service flaw was found in how polkit handled authorization
requests. A local, unprivileged user could send malicious requests to
polkit, which could then cause the polkit daemon to corrupt its memory and
crash. (CVE-2015-3256)

All polkit users should upgrade to these updated packages, which contain a
backported patch to correct this issue. The system must be rebooted for
this update to take effect.

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/):

1245684 - CVE-2015-3256 polkit: Memory corruption via javascript rule evaluation

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
polkit-0.112-6.el7_2.src.rpm

x86_64:
polkit-0.112-6.el7_2.i686.rpm
polkit-0.112-6.el7_2.x86_64.rpm
polkit-debuginfo-0.112-6.el7_2.i686.rpm
polkit-debuginfo-0.112-6.el7_2.x86_64.rpm

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

noarch:
polkit-docs-0.112-6.el7_2.noarch.rpm

x86_64:
polkit-debuginfo-0.112-6.el7_2.i686.rpm
polkit-debuginfo-0.112-6.el7_2.x86_64.rpm
polkit-devel-0.112-6.el7_2.i686.rpm
polkit-devel-0.112-6.el7_2.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
polkit-0.112-6.el7_2.src.rpm

x86_64:
polkit-0.112-6.el7_2.i686.rpm
polkit-0.112-6.el7_2.x86_64.rpm
polkit-debuginfo-0.112-6.el7_2.i686.rpm
polkit-debuginfo-0.112-6.el7_2.x86_64.rpm

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

noarch:
polkit-docs-0.112-6.el7_2.noarch.rpm

x86_64:
polkit-debuginfo-0.112-6.el7_2.i686.rpm
polkit-debuginfo-0.112-6.el7_2.x86_64.rpm
polkit-devel-0.112-6.el7_2.i686.rpm
polkit-devel-0.112-6.el7_2.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
polkit-0.112-6.el7_2.src.rpm

noarch:
polkit-docs-0.112-6.el7_2.noarch.rpm

ppc64:
polkit-0.112-6.el7_2.ppc.rpm
polkit-0.112-6.el7_2.ppc64.rpm
polkit-debuginfo-0.112-6.el7_2.ppc.rpm
polkit-debuginfo-0.112-6.el7_2.ppc64.rpm
polkit-devel-0.112-6.el7_2.ppc.rpm
polkit-devel-0.112-6.el7_2.ppc64.rpm

ppc64le:
polkit-0.112-6.el7_2.ppc64le.rpm
polkit-debuginfo-0.112-6.el7_2.ppc64le.rpm
polkit-devel-0.112-6.el7_2.ppc64le.rpm

s390x:
polkit-0.112-6.el7_2.s390.rpm
polkit-0.112-6.el7_2.s390x.rpm
polkit-debuginfo-0.112-6.el7_2.s390.rpm
polkit-debuginfo-0.112-6.el7_2.s390x.rpm
polkit-devel-0.112-6.el7_2.s390.rpm
polkit-devel-0.112-6.el7_2.s390x.rpm

x86_64:
polkit-0.112-6.el7_2.i686.rpm
polkit-0.112-6.el7_2.x86_64.rpm
polkit-debuginfo-0.112-6.el7_2.i686.rpm
polkit-debuginfo-0.112-6.el7_2.x86_64.rpm
polkit-devel-0.112-6.el7_2.i686.rpm
polkit-devel-0.112-6.el7_2.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
polkit-0.112-6.el7_2.src.rpm

noarch:
polkit-docs-0.112-6.el7_2.noarch.rpm

x86_64:
polkit-0.112-6.el7_2.i686.rpm
polkit-0.112-6.el7_2.x86_64.rpm
polkit-debuginfo-0.112-6.el7_2.i686.rpm
polkit-debuginfo-0.112-6.el7_2.x86_64.rpm
polkit-devel-0.112-6.el7_2.i686.rpm
polkit-devel-0.112-6.el7_2.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-2015-3256
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2016 Red Hat, Inc.
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