ESB-2019.0399.2 - UPDATE [Ubuntu] openssh-client: Multiple vulnerabilities 2019-03-05

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2019.0399.2
                          OpenSSH vulnerabilities
                               5 March 2019

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

Product:           openssh-client
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Modify Arbitrary Files         -- Remote with User Interaction
                   Provide Misleading Information -- Remote with User Interaction
                   Unauthorised Access            -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6111 CVE-2019-6109 CVE-2018-20685

Reference:         ESB-2019.0164.2

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3885-1
   http://www.ubuntu.com/usn/usn-3885-2

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

Revision History:  March    5 2019: Added USN-3885-2 due to incomplete fix.
                   February 8 2019: Initial Release

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USN-3885-1: OpenSSH vulnerabilities
7 February 2019

openssh vulnerabilities
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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

Several security issues were fixed in OpenSSH.

Software Description

    openssh - secure shell (SSH) for secure access to remote machines

Details

Harry Sintonen discovered multiple issus in the OpenSSH scp utility. If a user
or automated system were tricked into connecting to an untrusted server, a
remote attacker could possibly use these issues to write to arbitrary files,
change directory permissions, and spoof client output.

Update instructions

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

Ubuntu 18.10
    openssh-client - 1:7.7p1-4ubuntu0.2
Ubuntu 18.04 LTS
    openssh-client - 1:7.6p1-4ubuntu0.2
Ubuntu 16.04 LTS
    openssh-client - 1:7.2p2-4ubuntu2.7
Ubuntu 14.04 LTS
    openssh-client - 1:6.6p1-2ubuntu2.12

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

    CVE-2018-20685
    CVE-2019-6109
    CVE-2019-6111
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: OpenSSH vulnerability
4 March 2019

openssh vulnerability
==========================================================================

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

  o Ubuntu 18.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 LTS

Summary

One of the fixes in USN-3885-1 was incomplete.

Software Description

  o openssh - secure shell (SSH) for secure access to remote machines

Details

USN-3885-1 fixed vulnerabilities in OpenSSH. It was discovered that the fix for
CVE-2019-6111 turned out to be incomplete. This update fixes the problem.

Original advisory details:

Harry Sintonen discovered multiple issues in the OpenSSH scp utility. If a user
or automated system were tricked into connecting to an untrusted server, a
remote attacker could possibly use these issues to write to arbitrary files,
change directory permissions, and spoof client output.

Update instructions

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

Ubuntu 18.10
    openssh-client - 1:7.7p1-4ubuntu0.3
Ubuntu 18.04 LTS
    openssh-client - 1:7.6p1-4ubuntu0.3
Ubuntu 16.04 LTS
    openssh-client - 1:7.2p2-4ubuntu2.8
Ubuntu 14.04 LTS
    openssh-client - 1:6.6p1-2ubuntu2.13

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

In general, a standard system update will make all the necessary changes.

References

  o USN-3885-1
  o CVE-2019-6111

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