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ESB-2014.1072 - [Win][UNIX/Linux][Debian] dbus: Denial of service - Existing account

Date: 03 July 2014
References: ESB-2015.2409  

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

                               ESB-2014.1072
                           dbus security update
                                3 July 2014

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

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

Product:           dbus
Publisher:         Debian
Operating System:  Debian GNU/Linux 7
                   UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-3533 CVE-2014-3532 CVE-2014-3477

Original Bulletin: 
   http://www.debian.org/security/2014/dsa-2971

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

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- - -------------------------------------------------------------------------
Debian Security Advisory DSA-2971-1                   security@debian.org
http://www.debian.org/security/                      Salvatore Bonaccorso
July 02, 2014                          http://www.debian.org/security/faq
- - -------------------------------------------------------------------------

Package        : dbus
CVE ID         : CVE-2014-3477 CVE-2014-3532 CVE-2014-3533

Several vulnerabilities have been discovered in dbus, an asynchronous
inter-process communication system. The Common Vulnerabilities and
Exposures project identifies the following problems:

CVE-2014-3477

    Alban Crequy at Collabora Ltd. discovered that dbus-daemon sends an
    AccessDenied error to the service instead of a client when the
    client is prohibited from accessing the service. A local attacker
    could use this flaw to cause a bus-activated service that is not
    currently running to attempt to start, and fail, denying other users
    access to this service.

CVE-2014-3532

    Alban Crequy at Collabora Ltd. discovered a bug in dbus-daemon's
    support for file descriptor passing. A malicious process could force
    system services or user applications to be disconnected from the
    D-Bus system by sending them a message containing a file descriptor,
    leading to a denial of service.

CVE-2014-3533

    Alban Crequy at Collabora Ltd. and Alejandro Martinez Suarez
    discovered that a malicious process could force services to be
    disconnected from the D-Bus system by causing dbus-daemon to attempt
    to forward invalid file descriptors to a victim process, leading to
    a denial of service.

For the stable distribution (wheezy), these problems have been fixed in
version 1.6.8-1+deb7u3.

For the unstable distribution (sid), these problems have been fixed in
version 1.8.6-1.

We recommend that you upgrade your dbus packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
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                On call after hours for member emergencies only.
===========================================================================
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