Code maintenance / Compat changes
---------------------------------
- adapt to new "encrypt-then-mac" cipher suites in OpenSSL 3.6.0 - these
need special handling which we don't do, so the t_lpback self-test
failed on them. Exclude from list of allowed ciphers, as there is no
strong reason today to make OpenVPN use these.
- fix various compile-time warnings
Documentation updates
---------------------
- fix outdated and non-HTTPS URLs throughout the tree (doxygen, warnings,
manpage, ...)
Bugfixes
--------
- Fix memcmp check for the hmac verification in the 3way handshake.
This bug renders the HMAC based protection against state exhaustion on
receiving spoofed TLS handshake packets in the OpenVPN server inefficient.
CVE: 2025-13086
- fix invalid pointer creation in tls_pre_decrypt() - technically this is
a memory over-read issue, in practice, the compilers optimize it away
so no negative effects could be observed.
- Windows: in the interactive service, fix the "undo DNS config" handling.
- Windows: in the interactive service, disallow using of "stdin" for the
config file, unless the caller is authorized OpenVPN Administrator
- Windows: in the interactive service, change all netsh calls to use
interface index and not interface name - sidesteps all possible attack
avenues with special characters in interface names.
- Windows: in the interactive service, improve error handling in
some "unlikely to happen" paths.
- auth plugin/script handling: properly check for errors in creation on
$auth_failed_reason_file (arf).
- for incoming TCP connections, close-on-exec option was applied to
the wrong socket fd, leaking socket FDs to child processes.
- sitnl: set close-on-exec flag on netlink socket
- ssl_mbedtls: fix missing perf_pop() call (optional performance profiling)
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
351ac66213