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Gentoo Linux Security Advisory 201810-03

Gentoo Linux Security Advisory 201810-03
Posted Oct 7, 2018
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201810-3 - A vulnerability in OpenSSH might allow remote attackers to determine valid usernames. Versions less than 7.7_p1-r8 are affected.

tags | advisory, remote
systems | linux, gentoo
advisories | CVE-2018-15473
MD5 | 95aaa0edcbe0e876c4b4578d400f43be

Gentoo Linux Security Advisory 201810-03

Change Mirror Download
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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

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