Operating System:

[Debian]

Published:

29 January 2019

Protect yourself against future threats.

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

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

                               ESB-2019.0230
               [SECURITY] [DLA 1643-1] krb5 security update
                              29 January 2019

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

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

Product:           krb5
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Denial of Service   -- Existing Account
                   Unauthorised Access -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-20217 CVE-2018-5730 CVE-2018-5729

Reference:         ESB-2018.3904
                   ESB-2018.3400

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html

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

Package        : krb5
Version        : 1.12.1+dfsg-19+deb8u5
CVE ID         : CVE-2018-5729 CVE-2018-5730 CVE-2018-20217


krb5, a MIT Kerberos implementation, had several flaws in LDAP DN 
checking, which could be used to circumvent a DN containership check by 
supplying special parameters to some calls.
Further an attacker could crash the KDC by making S4U2Self requests.


For Debian 8 "Jessie", 
these problems have been fixed in version 1.12.1+dfsg-19+deb8u5.

We recommend that you upgrade your krb5 packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

- --------------------------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:

        https://www.auscert.org.au/bulletins/

===========================================================================
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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=/55w
-----END PGP SIGNATURE-----