RedHat: RHSA-2016-0566:01 Moderate: libssh security update
Summary
libssh is a library which implements the SSH protocol. It can be used to
implement client and server applications.
Security Fix(es):
* A type confusion issue was found in the way libssh generated ephemeral
secrets for the diffie-hellman-group1 and diffie-hellman-group14 key
exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use
significantly less secure random parameters. (CVE-2016-0739)
Red Hat would like to thank Aris Adamantiadis for reporting this issue.
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
After installing these updated packages, all running applications using
libssh must be restarted for this update to take effect.
References
https://access.redhat.com/security/cve/CVE-2016-0739 https://access.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Enterprise Linux 7 Extras:
Source:
libssh-0.7.1-2.el7.src.rpm
x86_64:
libssh-0.7.1-2.el7.x86_64.rpm
libssh-debuginfo-0.7.1-2.el7.x86_64.rpm
libssh-devel-0.7.1-2.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for libssh is now available for Red Hat Enterprise Linux 7Extras.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux 7 Extras - x86_64
Bugs Fixed
1305971 - CVE-2016-0739 libssh: bits/bytes confusion resulting in truncated Difffie-Hellman secret length