Introduction

This page lists all security announcements made by the OpenVPN project.

Announcements

• CVE-2023-46849: Use of --fragment option can lead to a division by zero error which can be fatal (Nov 2023)
• TunnelCrack: LocalNet and ServerIP attacks on insecure networks (Oct 2023)
• CVE-2022-0547: Potential authentication by-pass with multiple deferred authentication plug-ins
• CVE-2021-3547: OpenVPN 3 Core library 3.6 and 3.6.1 possible certificate authentication bypass with --verify-x509-name
• CVE-2021-3606: OpenVPN 2.5.2 (Windows only) may load an external OpenSSL configuration file
• CVE-2020-15078: partial information leak upon unauthorized client reconnection (Apr 2021)
• DUHK attack: ANSI X9.31 RNG and Don't Use Hard-coded Keys (Oct 2017)
• Code execution and Privilege escalation problems with NSIS installers (Sep 2017)
• CVE-2017-12166: out of bounds write in key-method 1 (Sep 2017)
• Unquoted service paths in OpenVPN 2.4 Windows installers
• Vulnerabilities fixed in OpenVPN 2.3.17 and 2.4.3 (June 2017)
• Quarkslab and Cryptography Engineering audits (May 2017)
• Linux kernel, UDP packets and MSG_PEEK (CVE-2016-10229) (April 2017)
• OpenVPN and SWEET32 (Aug 2016)
• Tap-windows6 buffer overflow vulnerability (May 2016)
• Vulnerabilities fixed in OpenSSL 1.0.1m (Mar 2015)
• Security announcement: The FREAK vulnerability (Mar 2015)
• Security announcement: critical denial of service vulnerability (CVE-2014-8104) (Nov 2014)
• Vulnerabilities fixed in OpenSSL 1.0.1j (Oct 2014)
• Vulnerabilities fixed in OpenSSL 1.0.1i (Aug 2014)
• OpenSSL CCS Injection Vulnerability (CVE-2014-0224) and OpenVPN (Jun 2014)
• OpenSSL 'Heartbleed' vulnerability and OpenVPN (Apr 2014)
• TLS Triple Handshake Vulnerability and OpenVPN (Mar 2013)
• Security announcement: use of non-constant-time memcmp in HMAC comparison in openvpn_decrypt (CVE-2013-2061) (Mar 2013)