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- Introduce sandboxing of the pre-auth privsep child using an optional
sshd_config(5) "UsePrivilegeSeparation=sandbox" mode that enables
mandatory restrictions on the syscalls the privsep child can perform.
- Add new SHA256-based HMAC transport integrity modes from
http://www.ietf.org/id/draft-dbider-sha2-mac-for-ssh-02.txt.
- The pre-authentication sshd(8) privilege separation slave process now
logs via a socket shared with the master process, avoiding the need to
maintain /dev/log inside the chroot (closes: #75043, #429243,
#599240).
- ssh(1) now warns when a server refuses X11 forwarding (closes:
#504757).
- sshd_config(5)'s AuthorizedKeysFile now accepts multiple paths,
separated by whitespace (closes: #76312). The authorized_keys2
fallback is deprecated but documented (closes: #560156).
- ssh(1) and sshd(8): set IPv6 traffic class from IPQoS, as well as IPv4
ToS/DSCP (closes: #498297).
- ssh-add(1) now accepts keys piped from standard input. E.g. "ssh-add
- < /path/to/key" (closes: #229124).
- Clean up lost-passphrase text in ssh-keygen(1) (closes: #444691).
- Say "required" rather than "recommended" in unprotected-private-key
warning (LP: #663455).
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[log.c log.h monitor.c monitor.h monitor_wrap.c monitor_wrap.h sshd.c]
make the pre-auth privsep slave log via a socketpair shared with the
monitor rather than /var/empty/dev/log; ok dtucker@ deraadt@ markus@
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for a while, but there's no GSSAPI patch available for it yet.
- Change the default cipher order to prefer the AES CTR modes and the
revised "arcfour256" mode to CBC mode ciphers that are susceptible to
CPNI-957037 "Plaintext Recovery Attack Against SSH".
- Add countermeasures to mitigate CPNI-957037-style attacks against the
SSH protocol's use of CBC-mode ciphers. Upon detection of an invalid
packet length or Message Authentication Code, ssh/sshd will continue
reading up to the maximum supported packet length rather than
immediately terminating the connection. This eliminates most of the
known differences in behaviour that leaked information about the
plaintext of injected data which formed the basis of this attack
(closes: #506115, LP: #379329).
- ForceCommand directive now accepts commandline arguments for the
internal-sftp server (closes: #524423, LP: #362511).
- Add AllowAgentForwarding to available Match keywords list (closes:
#540623).
- Make ssh(1) send the correct channel number for
SSH2_MSG_CHANNEL_SUCCESS and SSH2_MSG_CHANNEL_FAILURE messages to
avoid triggering 'Non-public channel' error messages on sshd(8) in
openssh-5.1.
- Avoid printing 'Non-public channel' warnings in sshd(8), since the
ssh(1) has sent incorrect channel numbers since ~2004 (this reverts a
behaviour introduced in openssh-5.1; closes: #496017).
* Update to GSSAPI patch from
http://www.sxw.org.uk/computing/patches/openssh-5.2p1-gsskex-all-20090726.patch,
including cascading credentials support (LP: #416958).
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[auth.h auth2.c monitor.c monitor.h monitor_wrap.c monitor_wrap.h]
[readconf.c readconf.h servconf.c servconf.h ssh2.h ssh_config.5]
[sshconnect2.c sshd_config.5 jpake.c jpake.h schnorr.c auth2-jpake.c]
[Makefile.in]
Add support for an experimental zero-knowledge password authentication
method using the J-PAKE protocol described in F. Hao, P. Ryan,
"Password Authenticated Key Exchange by Juggling", 16th Workshop on
Security Protocols, Cambridge, April 2008.
This method allows password-based authentication without exposing
the password to the server. Instead, the client and server exchange
cryptographic proofs to demonstrate of knowledge of the password while
revealing nothing useful to an attacker or compromised endpoint.
This is experimental, work-in-progress code and is presently
compiled-time disabled (turn on -DJPAKE in Makefile.inc).
"just commit it. It isn't too intrusive." deraadt@
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changes not previously backported to 4.3p2:
- 4.4/4.4p1 (http://www.openssh.org/txt/release-4.4):
+ On portable OpenSSH, fix a GSSAPI authentication abort that could be
used to determine the validity of usernames on some platforms.
+ Implemented conditional configuration in sshd_config(5) using the
"Match" directive. This allows some configuration options to be
selectively overridden if specific criteria (based on user, group,
hostname and/or address) are met. So far a useful subset of
post-authentication options are supported and more are expected to
be added in future releases.
+ Add support for Diffie-Hellman group exchange key agreement with a
final hash of SHA256.
+ Added a "ForceCommand" directive to sshd_config(5). Similar to the
command="..." option accepted in ~/.ssh/authorized_keys, this forces
the execution of the specified command regardless of what the user
requested. This is very useful in conjunction with the new "Match"
option.
+ Add a "PermitOpen" directive to sshd_config(5). This mirrors the
permitopen="..." authorized_keys option, allowing fine-grained
control over the port-forwardings that a user is allowed to
establish.
+ Add optional logging of transactions to sftp-server(8).
+ ssh(1) will now record port numbers for hosts stored in
~/.ssh/known_hosts when a non-standard port has been requested
(closes: #50612).
+ Add an "ExitOnForwardFailure" option to cause ssh(1) to exit (with a
non-zero exit code) when requested port forwardings could not be
established.
+ Extend sshd_config(5) "SubSystem" declarations to allow the
specification of command-line arguments.
+ Replacement of all integer overflow susceptible invocations of
malloc(3) and realloc(3) with overflow-checking equivalents.
+ Many manpage fixes and improvements.
+ Add optional support for OpenSSL hardware accelerators (engines),
enabled using the --with-ssl-engine configure option.
+ Tokens in configuration files may be double-quoted in order to
contain spaces (closes: #319639).
+ Move a debug() call out of a SIGCHLD handler, fixing a hang when the
session exits very quickly (closes: #307890).
+ Fix some incorrect buffer allocation calculations (closes: #410599).
+ ssh-add doesn't ask for a passphrase if key file permissions are too
liberal (closes: #103677).
+ Likewise, ssh doesn't ask either (closes: #99675).
- 4.6/4.6p1 (http://www.openssh.org/txt/release-4.6):
+ sshd now allows the enabling and disabling of authentication methods
on a per user, group, host and network basis via the Match directive
in sshd_config.
+ Fixed an inconsistent check for a terminal when displaying scp
progress meter (closes: #257524).
+ Fix "hang on exit" when background processes are running at the time
of exit on a ttyful/login session (closes: #88337).
* Update to current GSSAPI patch from
http://www.sxw.org.uk/computing/patches/openssh-4.6p1-gsskex-20070312.patch;
install ChangeLog.gssapi.
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* NMU to update SELinux patch, bringing it in line with current selinux
releases. The patch for this NMU is simply the Bug#394795 patch,
and no other changes. (closes: #394795)
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[atomicio.h auth-options.h auth.h auth2-gss.c authfd.h authfile.h]
[bufaux.h buffer.h canohost.h channels.h cipher.h clientloop.h]
[compat.h compress.h crc32.c crc32.h deattack.h dh.h dispatch.h]
[dns.c dns.h getput.h groupaccess.h gss-genr.c gss-serv-krb5.c]
[gss-serv.c hostfile.h includes.h kex.h key.h log.h mac.h match.h]
[misc.h monitor.h monitor_fdpass.h monitor_mm.h monitor_wrap.h msg.h]
[myproposal.h packet.h pathnames.h progressmeter.h readconf.h rsa.h]
[scard.h servconf.h serverloop.h session.h sftp-common.h sftp.h]
[ssh-gss.h ssh.h ssh1.h ssh2.h sshconnect.h sshlogin.h sshpty.h]
[ttymodes.h uidswap.h uuencode.h xmalloc.h]
standardise spacing in $OpenBSD$ tags; requested by deraadt@
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- Add GSSAPI key exchange support from
http://www.sxw.org.uk/computing/patches/openssh.html (thanks, Stephen
Frost).
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monitor.h monitor_wrap.c monitor_wrap.h session.c sshd.c] Bug #125:
(first stage) Add audit instrumentation to sshd, currently disabled by
default. with suggestions from and djm@
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[auth2-gss.c gss-genr.c gss-serv.c monitor.c monitor.h monitor_wrap.c]
[monitor_wrap.h sshconnect2.c ssh-gss.h]
replace "gssapi" with "gssapi-with-mic"; from Simon Wilkinson;
test + ok jakob.
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[Makefile.in auth1.c auth2.c auth.c auth.h auth-krb5.c canohost.c
cleanup.c clientloop.c fatal.c gss-serv.c log.c log.h monitor.c monitor.h
monitor_wrap.c monitor_wrap.h packet.c serverloop.c session.c session.h
ssh-agent.c sshd.c]
replace fatal_cleanup() and linked list of fatal callbacks with static
cleanup_exit() function. re-refine cleanup_exit() where appropriate,
allocate sshd's authctxt eary to allow simpler cleanup in sshd.
tested by many, ok deraadt@
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[auth-krb5.c auth.h auth1.c monitor.c monitor.h monitor_wrap.c]
[monitor_wrap.h readconf.c servconf.c session.c ssh_config.5]
[sshconnect1.c sshd.c sshd_config sshd_config.5]
remove kerberos support from ssh1, since it has been replaced with GSSAPI;
but keep kerberos passwd auth for ssh1 and 2; ok djm, hin, henning, ...
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[auth2.c auth2-gss.c auth.h compat.c compat.h gss-genr.c gss-serv-krb5.c
gss-serv.c monitor.c monitor.h monitor_wrap.c monitor_wrap.h readconf.c
readconf.h servconf.c servconf.h session.c session.h ssh-gss.h
ssh_config.5 sshconnect2.c sshd_config sshd_config.5]
support GSS API user authentication; patches from Simon Wilkinson,
stripped down and tested by Jakob and myself.
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UsePAM=yes; ok dtucker
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- markus@cvs.openbsd.org 2003/07/22 13:35:22
[auth1.c auth.h auth-passwd.c monitor.c monitor.h monitor_wrap.c
monitor_wrap.h readconf.c readconf.h servconf.c servconf.h session.c ssh.1
ssh.c ssh_config.5 sshconnect1.c sshd.c sshd_config.5 ssh.h]
remove (already disabled) KRB4/AFS support, re-enable -k in ssh(1);
test+ok henning@
- (dtucker) [Makefile.in acconfig.h configure.ac] Remove KRB4/AFS support.
- (dtucker) [auth-krb4.c radix.c radix.h] Remove KRB4/AFS specific files.
I hope I got this right....
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proper challenge-response module
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[auth1.c auth.h auth-krb4.c monitor.c monitor.h monitor_wrap.c]
[monitor_wrap.h]
krb4 + privsep; ok dugsong@, deraadt@
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[auth1.c auth.h auth-krb5.c monitor.c monitor.h]
[monitor_wrap.c monitor_wrap.h]
kerberos support for privsep. confirmed to work by lha@stacken.kth.se
patch from markus
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[auth-krb4.c monitor.h serverloop.c session.c ssh-agent.c sshd.c]
pid_t cleanup. Markus need this now to keep hacking.
markus@, millert@ ok
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[monitor.h]
no trailing comma in enum; china@thewrittenword.com
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[monitor.h monitor_fdpass.h monitor_mm.h monitor_wrap.h]
$OpenBSD$
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[auth-bsdauth.c auth-options.c auth-rh-rsa.c auth-rsa.c auth-skey.c auth.h
auth1.c auth2-chall.c auth2.c kex.c kex.h kexdh.c kexgex.c servconf.c
session.h servconf.h serverloop.c session.c sshd.c]
integrate privilege separated openssh; its turned off by default for now.
work done by me and markus@
applied, but outside of ensure that smaller code bits migrated with
their owners.. no work was tried to 'fix' it to work. =) Later project!
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PAM, Cygwin and OSF SIA will not work for sure
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