– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Gentoo Linux Security Advisory GLSA 202007-21
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
https://security.gentoo.org/
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Severity: Normal
Title: Libreswan: Denial of service
Date: July 27, 2020
Bugs: #722696
ID: 202007-21
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Synopsis
========
A vulnerability in Libreswan could lead to a Denial of Service
condition.
Background
==========
Libreswan is a free software implementation of the most widely
supported and standarized VPN protocol based on (“IPsec”) and the
Internet Key Exchange (“IKE”).
Affected packages
=================
——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 net-vpn/libreswan < 3.32 >= 3.32
Description
===========
As a result of a bug in handling certain bogus encrypted IKEv1, while
building a log message that the packet has been dropped, a NULL pointer
dereference causes Libreswan to crash and restart when it attempts to
log the state name involved.
Impact
======
An attacker could cause a possible Denial of Service condition.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Libreswan users should upgrade to the latest version:
# emerge –sync
# emerge –ask –oneshot –verbose “>=net-vpn/libreswan-3.32”
References
==========
[ 1 ] CVE-2020-1763
https://nvd.nist.gov/vuln/detail/CVE-2020-1763
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202007-21
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
<html><head><meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″></head><body style=”word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;” class=””><pre style=”word-wrap: break-word; white-space: pre-wrap;” class=””>- – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Gentoo Linux Security Advisory GLSA 202007-21
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
<a href=”https://security.gentoo.org/” class=””>https://security.gentoo.org/</a>
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Severity: Normal
Title: Libreswan: Denial of service
Date: July 27, 2020
Bugs: #722696
ID: 202007-21
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Synopsis
========
A vulnerability in Libreswan could lead to a Denial of Service
condition.
Background
==========
Libreswan is a free software implementation of the most widely
supported and standarized VPN protocol based on (“IPsec”) and the
Internet Key Exchange (“IKE”).
Affected packages
=================
——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 net-vpn/libreswan < 3.32 >= 3.32
Description
===========
As a result of a bug in handling certain bogus encrypted IKEv1, while
building a log message that the packet has been dropped, a NULL pointer
dereference causes Libreswan to crash and restart when it attempts to
log the state name involved.
Impact
======
An attacker could cause a possible Denial of Service condition.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Libreswan users should upgrade to the latest version:
# emerge –sync
# emerge –ask –oneshot –verbose “>=net-vpn/libreswan-3.32”
References
==========
[ 1 ] CVE-2020-1763
<a href=”https://nvd.nist.gov/vuln/detail/CVE-2020-1763″ class=””>https://nvd.nist.gov/vuln/detail/CVE-2020-1763</a>
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
<a href=”https://security.gentoo.org/glsa/202007-21″ class=””>https://security.gentoo.org/glsa/202007-21</a>
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
<a href=”mailto:security@gentoo.org” class=””>security@gentoo.org</a> or alternatively, you may file a bug at
<a href=”https://bugs.gentoo.org” class=””>https://bugs.gentoo.org</a>.
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.
<a href=”https://creativecommons.org/licenses/by-sa/2.5″ class=””>https://creativecommons.org/licenses/by-sa/2.5</a></pre><div class=””><br class=””></div></body></html>—–BEGIN PGP SIGNATURE—–
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