Import OpenSSH-6.1p1. Features: * ssh-keygen(1): Add optional checkpoints for moduli screening * ssh-add(1): new -k option to load plain keys (skipping certificates) * sshd(8): Add wildcard support to PermitOpen, allowing things like "PermitOpen localhost:*". bz #1857 * ssh(1): support for cancelling local and remote port forwards via the multiplex socket. Use ssh -O cancel -L xx:xx:xx -R yy:yy:yy user@host" to request the cancellation of the specified forwardings * support cancellation of local/dynamic forwardings from ~C commandline * sshd(8): This release turns on pre-auth sandboxing sshd by default for new installs, by setting UsePrivilegeSeparation=sandbox in sshd_config. * ssh-keygen(1): Add options to specify starting line number and number of lines to process when screening moduli candidates, allowing processing of different parts of a candidate moduli file in parallel * sshd(8): The Match directive now supports matching on the local (listen) address and port upon which the incoming connection was received via LocalAddress and LocalPort clauses. * sshd(8): Extend sshd_config Match directive to allow setting AcceptEnv and {Allow,Deny}{Users,Groups} * Add support for RFC6594 SSHFP DNS records for ECDSA key types. bz#1978 * ssh-keygen(1): Allow conversion of RSA1 keys to public PEM and PKCS8 * sshd(8): Allow the sshd_config PermitOpen directive to accept "none" as an argument to refuse all port-forwarding requests. * sshd(8): Support "none" as an argument for AuthorizedPrincipalsFile * ssh-keyscan(1): Look for ECDSA keys by default. bz#1971 * sshd(8): Add "VersionAddendum" to sshd_config to allow server operators to append some arbitrary text to the server SSH protocol banner. Bugfixes: * ssh(1): ensure that $DISPLAY contains only valid characters before using it to extract xauth data so that it can't be used to play local shell metacharacter games. * ssh(1): unbreak remote portforwarding with dynamic allocated listen ports * scp(1): uppress adding '--' to remote commandlines when the first argument does not start with '-'. saves breakage on some difficult-to-upgrade embedded/router platforms * ssh(1)/sshd(8): fix typo in IPQoS parsing: there is no "AF14" class, but there is an "AF21" class * ssh(1)/sshd(8): do not permit SSH2_MSG_SERVICE_REQUEST/ACCEPT during rekeying * ssh(1): skip attempting to create ~/.ssh when -F is passed * sshd(8): unbreak stdio forwarding when ControlPersist is in use; bz#1943 * sshd(1): send tty break to pty master instead of (probably already closed) slave side; bz#1859 * sftp(1): silence error spam for "ls */foo" in directory with files; bz#1683 * Fixed a number of memory and file descriptor leaks * ssh(1)/sshd(8): Don't spin in accept() in situations of file descriptor exhaustion. Instead back off for a while. * ssh(1)/sshd(8): Remove hmac-sha2-256-96 and hmac-sha2-512-96 MACs as they were removed from the specification. bz#2023, * sshd(8): Handle long comments in config files better. bz#2025 * ssh(1): Delay setting tty_flag so RequestTTY options are correctly picked up. bz#1995 * sshd(8): Fix handling of /etc/nologin incorrectly being applied to root on platforms that use login_cap.
Import OpenSSH-5.9p1. * 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. This intention is to prevent a compromised privsep child from being used to attack other hosts (by opening sockets and proxying) or probing local kernel attack surface. The rlimit sandbox is a fallback choice for platforms that don't support a better one; it uses setrlimit() to reset the hard-limit of file descriptors and processes to zero, which should prevent the privsep child from forking or opening new network connections. * Add new SHA256-based HMAC transport integrity modes from http://www.ietf.org/id/draft-dbider-sha2-mac-for-ssh-02.txt These modes are hmac-sha2-256, hmac-sha2-256-96, hmac-sha2-512, and hmac-sha2-512-96, and are available by default in ssh(1) and sshd(8) * 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. * ssh(1) now warns when a server refuses X11 forwarding * sshd_config(5)'s AuthorizedKeysFile now accepts multiple paths, separated by whitespace. The undocumented AuthorizedKeysFile2 option is deprecated (though the default for AuthorizedKeysFile includes .ssh/authorized_keys2) * sshd_config(5): similarly deprecate UserKnownHostsFile2 and GlobalKnownHostsFile2 by making UserKnownHostsFile and GlobalKnownHostsFile accept multiple options and default to include known_hosts2 * Retain key comments when loading v.2 keys. These will be visible in "ssh-add -l" and other places. bz#439 * ssh(1) and sshd(8): set IPv6 traffic class from IPQoS (as well as IPv4 ToS/DSCP). bz#1855 * ssh_config(5)'s ControlPath option now expands %L to the host portion of the destination host name. * ssh_config(5) "Host" options now support negated Host matching, e.g. Host *.example.org !c.example.org User mekmitasdigoat Will match "a.example.org", "b.example.org", but not "c.example.org" * ssh_config(5): a new RequestTTY option provides control over when a TTY is requested for a connection, similar to the existing -t/-tt/-T ssh(1) commandline options. * sshd(8): allow GSSAPI authentication to detect when a server-side failure causes authentication failure and don't count such failures against MaxAuthTries; bz#1244 * ssh-keygen(1): Add -A option. For each of the key types (rsa1, rsa, dsa and ecdsa) for which host keys do not exist, generate the host keys with the default key file path, an empty passphrase, default bits for the key type, and default comment. This is useful for system initialization scripts. * ssh(1): Allow graceful shutdown of multiplexing: request that a mux server removes its listener socket and refuse future multiplexing requests but don't kill existing connections. This may be requested using "ssh -O stop ..." * ssh-add(1) now accepts keys piped from standard input. E.g. "ssh-add - < /path/to/key" * ssh-keysign(8) now signs hostbased authentication challenges correctly using ECDSA keys; bz#1858 * sftp(1): document that sftp accepts square brackets to delimit addresses (useful for IPv6); bz#1847a * ssh(1): when using session multiplexing, the master process will change its process title to reflect the control path in use and when a ControlPersist-ed master is waiting to close; bz#1883 and bz#1911 * Other minor bugs fixed: 1849 1861 1862 1869 1875 1878 1879 1892 1900 1905 1913
Import OpenSSH-5.8p1. * Fix vulnerability in legacy certificate signing introduced in OpenSSH-5.6. * Implement Elliptic Curve Cryptography modes for key exchange (ECDH) and host/user keys (ECDSA) as specified by RFC5656. ECDH and ECDSA offer better performance than plain DH and DSA at the same equivalent symmetric key length, as well as much shorter keys. * sftp(1)/sftp-server(8): add a protocol extension to support a hard link operation. It is available through the "ln" command in the client. The old "ln" behaviour of creating a symlink is available using its "-s" option or through the preexisting "symlink" command * scp(1): Add a new -3 option to scp: Copies between two remote hosts are transferred through the local host. Without this option the data is copied directly between the two remote hosts. * ssh(1): automatically order the hostkeys requested by the client based on which hostkeys are already recorded in known_hosts. This avoids hostkey warnings when connecting to servers with new ECDSA keys, since these are now preferred when learning hostkeys for the first time. * ssh(1)/sshd(8): add a new IPQoS option to specify arbitrary TOS/DSCP/QoS values instead of hardcoding lowdelay/throughput. * ssh(1): "atomically" create the listening mux socket by binding it on a temporary name and then linking it into position after listen() has succeeded. This allows the mux clients to determine that the server socket is either ready or stale without races. stale server sockets are now automatically removed. * ssh(1)/sshd(8): add a KexAlgorithms knob to the client and server configuration to allow selection of which key exchange methods are used by ssh(1) and sshd(8) and their order of preference. * sftp(1)/scp(1): factor out bandwidth limiting code from scp(1) into a generic bandwidth limiter that can be attached using the atomicio callback mechanism and use it to add a bandwidth limit option to sftp(1). BugFixes: * ssh(1)/ssh-agent(1): honour $TMPDIR for client xauth and ssh-agent temporary directories. * ssh(1): avoid NULL deref on receiving a channel request on an unknown or invalid channel; * sshd(8): remove a debug() that pollutes stderr on client connecting to a server in debug mode * scp(1): pass through ssh command-line flags and options when doing remote-remote transfers, e.g. to enable agent forwarding which is particularly useful in this case; * sftp-server(8): umask should be parsed as octal * sftp(1): escape '[' in filename tab-completion * ssh(1): Typo in confirmation message. * sshd(8): prevent free() of string in .rodata when overriding AuthorizedKeys in a Match block * sshd(8): Use default shell /bin/sh if $SHELL is "" * ssh(1): kill proxy command on fatal() (we already killed it on clean exit); * ssh(1): install a SIGCHLD handler to reap expiried child process; * sshd(8): Use correct uid_t/pid_t types instead of int.
Upgrade to OpenSSH-5.3p1. General Bugfixes: * Do not limit home directory paths to 256 characters. bz#1615 * Several minor documentation and correctness fixes. Portable OpenSSH Bugfixes: * Move the deletion of PAM credentials on logout to after the session close. bz#1534 * Accept ENOSYS as a fallback error when attempting atomic rename(). bz#1535 * Fix detection of krb5-config. bz#1639 * Fix test for server-assigned remote forwarding port for non-root users. bz#1578
Upgrade to OpenSSH-5.2p1. Security: * This release changes 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". * This release also adds 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. We believe that these attacks are rendered infeasible by these changes. New features: * Added a -y option to ssh(1) to force logging to syslog rather than stderr, which is useful when running daemonised (ssh -f) * The sshd_config(5) ForceCommand directive now accepts commandline arguments for the internal-sftp server. * The ssh(1) ~C escape commandline now support runtime creation of dynamic (-D) port forwards. * Support the SOCKS4A protocol in ssh(1) dynamic (-D) forwards. (bz#1482) * Support remote port forwarding with a listen port of '0'. This informs the server that it should dynamically allocate a listen port and report it back to the client. (bz#1003) * sshd(8) now supports setting PermitEmptyPasswords and AllowAgentForwarding in Match blocks Bug and documentation fixes * Repair a ssh(1) crash introduced in openssh-5.1 when the client is sent a zero-length banner (bz#1496) * Due to interoperability problems with certain broken SSH implementations, the eow@openssh.com and no-more-sessions@openssh.com protocol extensions are now only sent to peers that identify themselves as OpenSSH. * 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). * Avoid double-free in ssh(1) ~C escape -L handler (bz#1539) * Correct fail-on-error behaviour in sftp(1) batchmode for remote stat operations. (bz#1541) * Disable nonfunctional ssh(1) ~C escape handler in multiplex slave connections. (bz#1543) * Avoid hang in ssh(1) when attempting to connect to a server that has MaxSessions=0 set. * Multiple fixes to sshd(8) configuration test (-T) mode * Several core and portable OpenSSH bugs fixed: 1380, 1412, 1418, 1419, 1421, 1490, 1491, 1492, 1514, 1515, 1518, 1520, 1538, 1540 * Many manual page improvements.
Add the HPN patch for OpenSSH. This provides dynamic windows and the ability to switch to a NONE encryption cipher after authentication. This does not include the multi-threaded AES-CTR cipher due to unresolved problems causing it to hang. For more details: http://www.psc.edu/networking/projects/hpn-ssh/ Requested-by: Michael Neumann <mneumann@ntecs.de>