An OpenVPN security update has been released for Gentoo Linux.
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Gentoo Linux Security Advisory GLSA 202105-25
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https://security.gentoo.org/
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Severity: Normal
Title: OpenVPN: Authentication bypass
Date: May 26, 2021
Bugs: #785115
ID: 202105-25
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Synopsis
========
A vulnerability has been found in OpenVPN, allowing attackers to bypass
the authentication process.
Background
==========
OpenVPN is a multi-platform, full-featured SSL VPN solution.
Affected packages
=================
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Package / Vulnerable / Unaffected
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1 net-vpn/openvpn < 2.5.2 >= 2.5.2
Description
===========
It was discovered that OpenVPN incorrectly handled deferred
authentication.
Impact
======
A remote attacker could bypass authentication and access control
channel data and trigger further information leaks.
Workaround
==========
Configure OpenVPN server to not use deferred authentication.
Resolution
==========
All OpenVPN users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-vpn/openvpn-2.5.2"
References
==========
[ 1 ] CVE-2020-15078
https://nvd.nist.gov/vuln/detail/CVE-2020-15078
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202105-25
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 2021 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
