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Ed Maste
bb5c77e9d2
Full release notes are available at https://www.openssh.com/txt/release-10.4 Selected highlights from the release notes: Potentially-incompatible changes -------------------------------- * sshd(8): configuration dump mode ("sshd -G") now writes directives in mixed case (e.g. "PubkeyAuthentication") whereas previously it emitted only lower-case names. * ssh(1), sshd(8): make the transport protocol stricter by disconnecting if the peer sends non-KEX messages during a post- authentication key re-exchange. Previously a malicious peer could continue sending non-key exchange messages without penalty. These would be buffered, causing memory to be wasted up until the connection terminated or the server/client hit a memory limit. Implementations that do not restrict messages sent during key exchange as per RFC4253 section 7.1 may be disconnected. Reported by Marko Jevtic. Changes since OpenSSH 10.3 ========================== This release contains a number of security fixes as well as general bugfixes and a couple of new features. Security ======== * sftp(1): when downloading files on the command-line using "sftp host:/path .", a malicious server could cause the file to be downloaded to an unexpected location. This issue was identified by the Swival Security Scanner. * scp(1): when copying files between two remote destinations, do not allow a malicious server to write files to the parent directory of the intended target directory. This issue was identified by the Swival Security Scanner. * sshd(8): DisableForwarding=yes didn't override PermitTunnel=yes as it was documented to do. Note that PermitTunnel is not enabled by default. Reported independently by Huzaifa Sidhpurwala of Redhat and Marko Jevtic. * sshd(8): avoid a potential pre-authentication denial of service when GSSAPIAuthentication was enabled (this feature is off by default). This was not mitigated by MaxAuthTries, but would be penalised by PerSourcePenalties. This was reported by Manfred Kaiser of the milCERT AT (Austrian Ministry of Defence). * sshd(8): fix a number of cases where the minimum authentication delay was not being enforced. Reported by the Orange Cyberdefense Vulnerability Team. * ssh(1): fix a possible client-side use-after-free if the server changes its host key during a key reexchange. This was reported by Zhenpeng (Leo) Lin of Depthfirst. New features ------------ * All: add experimental support for a composite post-quantum signature scheme that combines ML-DSA 44 and Ed25519 as specified in draft-miller-sshm-mldsa44-ed25519-composite-sigs. This scheme is not enabled by default. To use it, you'll need to add it to HostKeyAlgorithms, PubkeyAcceptedAlgorithms, etc. Keys may be generated using "ssh-keygen -t mldsa44-ed25519". Bugfixes -------- * sshd(8): avoid sending observably different messages for valid vs invalid users in GSSAPIAuthentication (disabled by default). * ssh(1), sshd(8): fix several bugs that incorrectly classified bulk traffic as interactive. bz3972, bz3958 * ssh-keygen(1), ssh-add(1): skip unsupported key types when downloading resident keys from a FIDO token. Previously, downloads would abort when one was encountered. GHPR657 Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D58083
50 lines
2.0 KiB
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50 lines
2.0 KiB
Plaintext
See https://www.openssh.com/releasenotes.html for the release
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notes.
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Please read https://www.openssh.com/report.html for bug reporting
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instructions and note that we do not use Github for bug reporting.
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This is the port of OpenBSD's excellent OpenSSH[0] to Linux and other
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Unices.
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OpenSSH is based on the last free version of Tatu Ylonen's sample
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implementation with all patent-encumbered algorithms removed (to external
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libraries), all known security bugs fixed, new features reintroduced and
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many other clean-ups. OpenSSH was created by Aaron Campbell, Bob Beck,
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Markus Friedl, Niels Provos, Theo de Raadt, and Dug Song, and has been
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developed and maintained by Andre Lucas, Ben Lindstom, Damien Miller,
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Darren Tucker and Tim Rice. It has a homepage at https://www.openssh.com/
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This port consists of the re-introduction of autoconf support, PAM
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support, EGD/PRNGD support and replacements for OpenBSD library
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functions that are (regrettably) absent from other unices. This port
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has been best tested on AIX, Cygwin, HP-UX, Linux, MacOS/X,
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FreeBSD, NetBSD, OpenBSD, OpenServer, Solaris and UnixWare.
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This version actively tracks changes in the OpenBSD CVS repository.
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There is now several mailing lists for this port of OpenSSH. Please
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refer to https://www.openssh.com/list.html for details on how to join.
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Please send bug reports and patches to https://bugzilla.mindrot.org or
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the mailing list [email protected]. To mitigate spam, the
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list only allows posting from subscribed addresses. Code contribution
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are welcomed, but please follow the OpenBSD style guidelines[1].
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Please refer to the INSTALL document for information on dependencies and
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how to install OpenSSH on your system.
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Damien Miller <[email protected]>
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Miscellania -
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This version of OpenSSH is based upon code retrieved from the OpenBSD CVS
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repository which in turn was based on the last free sample implementation
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released by Tatu Ylonen.
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References -
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[0] https://www.openssh.com/
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[1] https://man.openbsd.org/style.9
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