The OpenVPN community project team is proud to release OpenVPN 2.6.7. This is a bugfix release containing security fixes.
Security Fixes: * CVE-2023-46850 OpenVPN versions between 2.6.0 and 2.6.6 incorrectly use a send buffer after it has been free()d in some circumstances, causing some free()d memory to be sent to the peer. All configurations using TLS (e.g. not using --secret) are affected by this issue. (found while tracking down CVE-2023-46849 / Github #400, #417) * CVE-2023-46849 OpenVPN versions between 2.6.0 and 2.6.6 incorrectly restore --fragment configuration in some circumstances, leading to a division by zero when --fragment is used. On platforms where division by zero is fatal, this will cause an OpenVPN crash.(Github #400, #417). User visible changes: * DCO: warn if DATA_V1 packets are sent by the other side - this a hard incompatibility between a 2.6.x client connecting to a 2.4.0-2.4.4 server, and the only fix is to use --disable-dco. * Remove OpenSSL Engine method for loading a key. This had to be removed because the original author did not agree to relicensing the code with the new linking exception added. This was a somewhat obsolete feature anyway as it only worked with OpenSSL 1.x, which is end-of-support. * add warning if p2p NCP client connects to a p2mp server - this is a combination that used to work without cipher negotiation (pre 2.6 on both ends), but would fail in non-obvious ways with 2.6 to 2.6. * add warning to --show-groups that not all supported groups are listed (this is due the internal enumeration in OpenSSL being a bit weird, omitting X448 and X25519 curves). * --dns: remove support for exclude-domains argument (this was a new 2.6 option, with no backend support implemented yet on any platform, and it turns out that no platform supported it at all - so remove option again) * warn user if INFO control message too long, do not forward to management client (safeguard against protocol-violating server implementations) New features: * DCO-WIN: get and log driver version (for easier debugging). * print "peer temporary key details" in TLS handshake * log OpenSSL errors on failure to set certificate, for example if the algorithms used are in acceptable to OpenSSL (misleading message would be printed in cryptoapi / pkcs11 scenarios) * add CMake build system for MinGW and MSVC builds * remove old MSVC build system * improve cmocka unit test building for Windows Windows MSI changes since 2.6.6: * Included openvpn-gui updated to 11.45.0.0 * Add clarity for error on missing management parameter. See GH #657 * Improve "OpenVPN GUI" tooltip handling See GH #649 * MSIs now use OpenSSL 3.1.4 More details can be found in the Changes document: <https://github.com/OpenVPN/openvpn/blob/release/2.6/Changes.rst> (The Changes document also contains a section with work-arounds for common problems encountered when using OpenVPN with OpenSSL 3) Source code and Windows installers can be downloaded from our download page: <https://openvpn.net/community-downloads/> Debian and Ubuntu packages are available in the official apt repositories: <https://community.openvpn.net/openvpn/wiki/OpenvpnSoftwareRepos#DebianUbuntu:UsingOpenVPNaptrepositories> On Red Hat derivatives we recommend using the Fedora Copr repository. <https://copr.fedorainfracloud.org/coprs/dsommers/openvpn-release-2.6/> Kind regards, Yuriy Darnobyt _______________________________________________ Openvpn-announce mailing list Openvpn-announce@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-announce