ESB-2018.3173.2 - UPDATE [Ubuntu] libssh: Unauthorised access - Remote/unauthenticated 2018-11-30

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.3173.2
                           libssh vulnerability
                             30 November 2018

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

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

Product:           libssh
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10933  

Reference:         ESB-2018.3135

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3795-1
   http://www.ubuntu.com/usn/usn-3795-3

Comment: This bulletin contains two (2) Ubuntu security advisories.

Revision History:  November 30 2018: Added USN-3795-3
                   October  18 2018: Initial Release

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

==========================================================================
Ubuntu Security Notice USN-3795-1
October 17, 2018

libssh vulnerability
==========================================================================

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

- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

libssh could allow unintended access to network services.

Software Description:
- - libssh: A tiny C SSH library

Details:

Peter Winter-Smith discovered that libssh incorrectly handled
authentication when being used as a server. A remote attacker could use
this issue to bypass authentication without any credentials.

Update instructions:

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

Ubuntu 18.04 LTS:
  libssh-4                        0.8.0~20170825.94fa1e38-1ubuntu0.1

Ubuntu 16.04 LTS:
  libssh-4                        0.6.3-4.3ubuntu0.1

Ubuntu 14.04 LTS:
  libssh-4                        0.6.1-0ubuntu3.4

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://usn.ubuntu.com/usn/usn-3795-1
  CVE-2018-10933

Package Information:
  https://launchpad.net/ubuntu/+source/libssh/0.8.0~20170825.94fa1e38-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/libssh/0.6.3-4.3ubuntu0.1
  https://launchpad.net/ubuntu/+source/libssh/0.6.1-0ubuntu3.4

==========================================================================
Ubuntu Security Notice USN-3795-3
November 29, 2018

libssh regression
==========================================================================

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

- - Ubuntu 18.10
- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

USN-3795-1 and USN-3795-2 introduced a regression in libssh.

Software Description:
- - libssh: A tiny C SSH library

Details:

USN-3795-1 and USN-3795-2 fixed a vulnerability in libssh. The upstream
fix introduced a regression. This update fixes the problem.

Original advisory details:

 Peter Winter-Smith discovered that libssh incorrectly handled
 authentication when being used as a server. A remote attacker could use
 this issue to bypass authentication without any credentials.

Update instructions:

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

Ubuntu 18.10:
  libssh-4                        0.8.1-1ubuntu0.3

Ubuntu 18.04 LTS:
  libssh-4                        0.8.0~20170825.94fa1e38-1ubuntu0.2

Ubuntu 16.04 LTS:
  libssh-4                        0.6.3-4.3ubuntu0.2

Ubuntu 14.04 LTS:
  libssh-4                        0.6.1-0ubuntu3.5

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://usn.ubuntu.com/usn/usn-3795-3
  https://usn.ubuntu.com/usn/usn-3795-1
  https://launchpad.net/bugs/1805348

Package Information:
  https://launchpad.net/ubuntu/+source/libssh/0.8.1-1ubuntu0.3
  https://launchpad.net/ubuntu/+source/libssh/0.8.0~20170825.94fa1e38-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/libssh/0.6.3-4.3ubuntu0.2
  https://launchpad.net/ubuntu/+source/libssh/0.6.1-0ubuntu3.5

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

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