Updated libssh packages fix security vulnerabilities:

When using libssh before 0.6.3, a libssh-based server, when accepting
a new connection, forks and the child process handles the request. The
RAND_bytes() function of openssl doesn’t reset its state after the
fork, but simply adds the current process id (getpid) to the PRNG
state, which is not guaranteed to be unique. The most important
consequence is that servers using EC (ECDSA) or DSA certificates may
under certain conditions leak their private key (CVE-2014-0017).

Double free vulnerability in the ssh_packet_kexinit function in kex.c
in libssh 0.5.x and 0.6.x before 0.6.4 allows remote attackers to
cause a denial of service via a crafted kexinit packet (CVE-2014-8132).