ESB-2017.2177 - [RedHat] openssh: Access confidential data - Remote/unauthenticated 2017-09-01

Printable version
PGP/GPG verifiable version

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

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

                               ESB-2017.2177
                     Moderate: openssh security update
                             1 September 2017

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

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

Product:           openssh
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 6
                   Red Hat Enterprise Linux WS/Desktop 6
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-6210  

Reference:         ESB-2017.1889
                   ESB-2017.0026
                   ESB-2016.2946

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2017:2563

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

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

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

Synopsis:          Moderate: openssh security update
Advisory ID:       RHSA-2017:2563-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:2563
Issue date:        2017-08-31
CVE Names:         CVE-2016-6210 
=====================================================================

1. Summary:

An update for openssh is now available for Red Hat Enterprise Linux 6.

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

2. Relevant releases/architectures:

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 Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

OpenSSH is an SSH protocol implementation supported by a number of Linux,
UNIX, and similar operating systems. It includes the core files necessary
for both the OpenSSH client and server.

Security Fix(es):

* A covert timing channel flaw was found in the way OpenSSH handled
authentication of non-existent users. A remote unauthenticated attacker
could possibly use this flaw to determine valid user names by measuring the
timing of server responses. (CVE-2016-6210)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

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

After installing this update, the OpenSSH server daemon (sshd) will be
restarted automatically.

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

1357442 - CVE-2016-6210 openssh: User enumeration via covert timing channel

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
openssh-5.3p1-123.el6_9.src.rpm

i386:
openssh-5.3p1-123.el6_9.i686.rpm
openssh-askpass-5.3p1-123.el6_9.i686.rpm
openssh-clients-5.3p1-123.el6_9.i686.rpm
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-server-5.3p1-123.el6_9.i686.rpm

x86_64:
openssh-5.3p1-123.el6_9.x86_64.rpm
openssh-askpass-5.3p1-123.el6_9.x86_64.rpm
openssh-clients-5.3p1-123.el6_9.x86_64.rpm
openssh-debuginfo-5.3p1-123.el6_9.x86_64.rpm
openssh-server-5.3p1-123.el6_9.x86_64.rpm

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

i386:
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-ldap-5.3p1-123.el6_9.i686.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.i686.rpm

x86_64:
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-debuginfo-5.3p1-123.el6_9.x86_64.rpm
openssh-ldap-5.3p1-123.el6_9.x86_64.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.i686.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.x86_64.rpm

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

Source:
openssh-5.3p1-123.el6_9.src.rpm

x86_64:
openssh-5.3p1-123.el6_9.x86_64.rpm
openssh-clients-5.3p1-123.el6_9.x86_64.rpm
openssh-debuginfo-5.3p1-123.el6_9.x86_64.rpm
openssh-server-5.3p1-123.el6_9.x86_64.rpm

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

x86_64:
openssh-askpass-5.3p1-123.el6_9.x86_64.rpm
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-debuginfo-5.3p1-123.el6_9.x86_64.rpm
openssh-ldap-5.3p1-123.el6_9.x86_64.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.i686.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
openssh-5.3p1-123.el6_9.src.rpm

i386:
openssh-5.3p1-123.el6_9.i686.rpm
openssh-askpass-5.3p1-123.el6_9.i686.rpm
openssh-clients-5.3p1-123.el6_9.i686.rpm
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-server-5.3p1-123.el6_9.i686.rpm

ppc64:
openssh-5.3p1-123.el6_9.ppc64.rpm
openssh-askpass-5.3p1-123.el6_9.ppc64.rpm
openssh-clients-5.3p1-123.el6_9.ppc64.rpm
openssh-debuginfo-5.3p1-123.el6_9.ppc64.rpm
openssh-server-5.3p1-123.el6_9.ppc64.rpm

s390x:
openssh-5.3p1-123.el6_9.s390x.rpm
openssh-askpass-5.3p1-123.el6_9.s390x.rpm
openssh-clients-5.3p1-123.el6_9.s390x.rpm
openssh-debuginfo-5.3p1-123.el6_9.s390x.rpm
openssh-server-5.3p1-123.el6_9.s390x.rpm

x86_64:
openssh-5.3p1-123.el6_9.x86_64.rpm
openssh-askpass-5.3p1-123.el6_9.x86_64.rpm
openssh-clients-5.3p1-123.el6_9.x86_64.rpm
openssh-debuginfo-5.3p1-123.el6_9.x86_64.rpm
openssh-server-5.3p1-123.el6_9.x86_64.rpm

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

i386:
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-ldap-5.3p1-123.el6_9.i686.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.i686.rpm

ppc64:
openssh-debuginfo-5.3p1-123.el6_9.ppc.rpm
openssh-debuginfo-5.3p1-123.el6_9.ppc64.rpm
openssh-ldap-5.3p1-123.el6_9.ppc64.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.ppc.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.ppc64.rpm

s390x:
openssh-debuginfo-5.3p1-123.el6_9.s390.rpm
openssh-debuginfo-5.3p1-123.el6_9.s390x.rpm
openssh-ldap-5.3p1-123.el6_9.s390x.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.s390.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.s390x.rpm

x86_64:
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-debuginfo-5.3p1-123.el6_9.x86_64.rpm
openssh-ldap-5.3p1-123.el6_9.x86_64.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.i686.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
openssh-5.3p1-123.el6_9.src.rpm

i386:
openssh-5.3p1-123.el6_9.i686.rpm
openssh-askpass-5.3p1-123.el6_9.i686.rpm
openssh-clients-5.3p1-123.el6_9.i686.rpm
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-server-5.3p1-123.el6_9.i686.rpm

x86_64:
openssh-5.3p1-123.el6_9.x86_64.rpm
openssh-askpass-5.3p1-123.el6_9.x86_64.rpm
openssh-clients-5.3p1-123.el6_9.x86_64.rpm
openssh-debuginfo-5.3p1-123.el6_9.x86_64.rpm
openssh-server-5.3p1-123.el6_9.x86_64.rpm

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

i386:
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-ldap-5.3p1-123.el6_9.i686.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.i686.rpm

x86_64:
openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
openssh-debuginfo-5.3p1-123.el6_9.x86_64.rpm
openssh-ldap-5.3p1-123.el6_9.x86_64.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.i686.rpm
pam_ssh_agent_auth-0.9.3-123.el6_9.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-2016-6210
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 2017 Red Hat, Inc.
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iD8DBQFZqCpaXlSAg2UNWIIRAqaGAKCxKKqNPpXeaeR2ChfmFnlXyUl1LgCgkkLs
Bbu1lhk6Dvd+PfAeTNvcyL4=
=j5vQ
- -----END PGP SIGNATURE-----

- --------------------------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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=V/Ni
-----END PGP SIGNATURE-----

« Back to bulletins