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
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
the client send its version string first if it is configured to speak
v2 only (the old hack of waiting to see the server version is only
really useful if you might be speaking v1 to some servers). The option
is on by default but can be disabled from the config file.
This aligns the OpenSSH client behavior with most other implementations
and eliminates a major source of connection delays and failures when
speaking SSH through particularly stupid proxies, of which, sadly, there
are many.
This change has also been submitted to OpenSSH as their bug #1999.
check for potentially exploitable overflows in asn1_d2i_read_bio
BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
in CRYPTO_realloc_clean. (CVE-2012-2110)
explicitly seed the OpenSSL RNG in each new process rather than letting
it repeatedly open /dev/urandom to reseed, which depletes entropy severely.
Note that the OpenSSH part of this fix works better on NetBSD than it would
on many other platforms because on NetBSD, if you don't reopen /dev/urandom,
repeated reads don't deplete entropy. On other platforms, some other
approach might be required.
Note also that this problem does not arise on OpenBSD because OpenBSD seems
to have patched OpenSSL to seed the RAND functions from arc4random()! That
seems dangerous, so I am not taking that approach here.
