A libssh security update has been released for Gentoo Linux.

gentoo-announce: GLSA 202011-05 : libssh: Denial of Service

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Gentoo Linux Security Advisory GLSA 202011-05
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  https://security.gentoo.org/
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Severity: Normal
Title: libssh: Denial of Service
Date: November 03, 2020
Bugs: #734624
ID: 202011-05

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Synopsis
=======
A vulnerability in libssh could lead to a Denial of Service condition.

Background
=========
libssh is a multiplatform C library implementing the SSHv2 protocol on
client and server side.

Affected packages
================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-libs/libssh < 0.9.5 >= 0.9.5

Description
==========
libssh was found to have a NULL pointer dereference in tftpserver.c if
the function ssh_buffer_new returns NULL.

Impact
=====
An attacker could cause a possible Denial of Service condition.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All libssh users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-libs/libssh-0.9.5"

References
=========
[ 1 ] CVE-2020-16135
  https://nvd.nist.gov/vuln/detail/CVE-2020-16135

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

  https://security.gentoo.org/glsa/202011-05

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 2020 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