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Gentoo Linux Security Advisory                           GLSA 201810-03
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                                           https://security.gentoo.org/
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 Severity: Low
    Title: OpenSSH: User enumeration vulnerability
     Date: October 06, 2018
     Bugs: #664264
       ID: 201810-03

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Synopsis
========

A vulnerability in OpenSSH might allow remote attackers to determine
valid usernames.

Background
==========

OpenSSH is a complete SSH protocol implementation that includes SFTP
client and server support.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-misc/openssh           < 7.7_p1-r8              >= 7.7_p1-r8

Description
===========

It was discovered that OpenSSH was prone to a user enumeration
vulnerability.

Impact
======

A remote attacker could conduct user enumeration.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSH users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-misc/openssh-7.7_p1-r8"

References
==========

[ 1 ] CVE-2018-15473
      https://nvd.nist.gov/vuln/detail/CVE-2018-15473

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/201810-03

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2018 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5