Home / mailings [gentoo-announce] [ GLSA 202011-05 ] libssh: Denial of Service
Posted on 03 November 2020
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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
=================
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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
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