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Gentoo: GLSA-202105-25 Normal: OpenVPN Authentication Bypass Risk

gentoo
Calendar Grey May 26, 2021
Dist Gentoo Esm H88
OpenVPN has been identified to have an authentication bypass vulnerability. Below are the essential details regarding the GLSA and recommended mitigation measures.
A vulnerability has been found in OpenVPN, allowing attackers to bypass the authentication process.

Summary

It was discovered that OpenVPN incorrectly handled deferred authentication.

Topics%20covered

Topics Covered

security advisory Gentoo information leak gentoo remote access authentication bypass OpenVPN normal normal severity

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
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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.

Severity: Normal
Title: OpenVPN: Authentication bypass
Date: May 26, 2021
Bugs: #785115
ID: 202105-25

Topics%20covered

Topics Covered

security advisory Gentoo information leak gentoo remote access authentication bypass OpenVPN normal normal severity

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.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-vpn/openvpn < 2.5.2 >= 2.5.2

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.

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