GLSA 202105-25: OpenVPN: Authentication bypass
| Severity: | normal |
| Title: | OpenVPN: Authentication bypass |
| Date: | 05/26/2021 |
| Bugs: | |
| ID: | 202105-25 |
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
| Package | Vulnerable | Unaffected | Architecture(s) |
|---|---|---|---|
| net-vpn/openvpn | < 2.5.2 | >= 2.5.2 | All supported architectures |
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
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
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 2010 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.