RHEL 6 / 7 : libssh2 (RHSA-2016:0428)

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

Updated libssh2 packages that fix one security issue are now available
for Red Hat Enterprise Linux 6 and 7.

Red Hat Product Security has rated this update as having Moderate
security impact. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available from the
CVE link in the References section.

The libssh2 packages provide a library that implements the SSHv2
protocol.

A type confusion issue was found in the way libssh2 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-2016-0787)

Red Hat would like to thank Aris Adamantiadis for reporting this
issue.

All libssh2 users are advised to upgrade to these updated packages,
which contain a backported patch to correct this issue. After
installing these updated packages, all running applications using
libssh2 must be restarted for this update to take effect.

See also :

https://www.redhat.com/security/data/cve/CVE-2016-0787.html
http://rhn.redhat.com/errata/RHSA-2016-0428.html

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 4.3
(CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N)
CVSS Temporal Score : 3.2
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 89820 ()

Bugtraq ID:

CVE ID: CVE-2016-0787

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