RHEL 7 : libssh (RHSA-2016:0566)

medium Nessus Plugin ID 90302

Synopsis

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

Description

An update for libssh is now available for Red Hat Enterprise Linux 7 Extras.

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

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.

Solution

Update the affected libssh, libssh-debuginfo and / or libssh-devel packages.

See Also

https://access.redhat.com/errata/RHSA-2016:0566

https://access.redhat.com/security/cve/cve-2016-0739

Plugin Details

Severity: Medium

ID: 90302

File Name: redhat-RHSA-2016-0566.nasl

Version: 2.12

Type: local

Agent: unix

Published: 4/1/2016

Updated: 10/24/2019

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:libssh, p-cpe:/a:redhat:enterprise_linux:libssh-debuginfo, p-cpe:/a:redhat:enterprise_linux:libssh-devel, cpe:/o:redhat:enterprise_linux:7

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 3/31/2016

Vulnerability Publication Date: 4/13/2016

Reference Information

CVE: CVE-2016-0739

RHSA: 2016:0566