ESB-2017.1760 - [Ubuntu] libkrb5-26-heimdal: Multiple vulnerabilities 2017-07-17

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

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

                               ESB-2017.1760
                           Heimdal vulnerability
                               17 July 2017

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

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

Product:           libkrb5-26-heimdal
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Privileged Data         -- Remote/Unauthenticated
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-11103  

Reference:         ESB-2017.1741

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3353-1

- --------------------------BEGIN INCLUDED TEXT--------------------

==========================================================================
Ubuntu Security Notice USN-3353-1
July 14, 2017

heimdal vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- - Ubuntu 17.04
- - Ubuntu 16.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Heimdal could allow unintended access to network services.

Software Description:
- - heimdal: Heimdal Kerberos Network Authentication Protocol

Details:

Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered
that Heimdal clients incorrectly trusted unauthenticated portions
of Kerberos tickets. A remote attacker could use this to impersonate
trusted network services or perform other attacks.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
  libkrb5-26-heimdal              7.1.0+dfsg-9ubuntu1.1

Ubuntu 16.10:
  libkrb5-26-heimdal              1.7~git20150920+dfsg-4ubuntu1.16.10.1

Ubuntu 16.04 LTS:
  libkrb5-26-heimdal              1.7~git20150920+dfsg-4ubuntu1.16.04.1

Ubuntu 14.04 LTS:
  libkrb5-26-heimdal              1.6~git20131207+dfsg-1ubuntu1.2

After a standard system update you need to restart any applications
using Heimdal libraries to make all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-3353-1
  CVE-2017-11103

Package Information:
  https://launchpad.net/ubuntu/+source/heimdal/7.1.0+dfsg-9ubuntu1.1
  https://launchpad.net/ubuntu/+source/heimdal/1.7~git20150920+dfsg-4ubuntu1.16.10.1
  https://launchpad.net/ubuntu/+source/heimdal/1.7~git20150920+dfsg-4ubuntu1.16.04.1
  https://launchpad.net/ubuntu/+source/heimdal/1.6~git20131207+dfsg-1ubuntu1.2

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
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)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=KsVC
-----END PGP SIGNATURE-----

« Back to bulletins