* [gentoo-announce] [ GLSA 202007-21 ] Libreswan: Denial of service
@ 2020-07-27 0:07 99% Sam James
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From: Sam James @ 2020-07-27 0:07 UTC (permalink / raw
To: gentoo-announce
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Gentoo Linux Security Advisory GLSA 202007-21
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https://security.gentoo.org/
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Severity: Normal
Title: Libreswan: Denial of service
Date: July 27, 2020
Bugs: #722696
ID: 202007-21
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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
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