CentOS 7 : openssh (CESA-2016:0043)

Medium Nessus Plugin ID 87930

Synopsis

The remote CentOS host is missing one or more security updates.

Description

Updated openssh packages that fix two security issues are now
available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate
security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

OpenSSH is OpenBSD's SSH (Secure Shell) protocol implementation. These
packages include the core files necessary for both the OpenSSH client
and server.

An information leak flaw was found in the way the OpenSSH client
roaming feature was implemented. A malicious server could potentially
use this flaw to leak portions of memory (possibly including private
SSH keys) of a successfully authenticated OpenSSH client.
(CVE-2016-0777)

A buffer overflow flaw was found in the way the OpenSSH client roaming
feature was implemented. A malicious server could potentially use this
flaw to execute arbitrary code on a successfully authenticated OpenSSH
client if that client used certain non-default configuration options.
(CVE-2016-0778)

Red Hat would like to thank Qualys for reporting these issues.

All openssh users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues. After
installing this update, the OpenSSH server daemon (sshd) will be
restarted automatically.

Solution

Update the affected openssh packages.

See Also

http://www.nessus.org/u?e7febb16

Plugin Details

Severity: Medium

ID: 87930

File Name: centos_RHSA-2016-0043.nasl

Version: 2.10

Type: local

Agent: unix

Published: 2016/01/15

Modified: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:N/AC:H/Au:S/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 8.1

Temporal Score: 7.1

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:openssh, p-cpe:/a:centos:centos:openssh-askpass, p-cpe:/a:centos:centos:openssh-clients, p-cpe:/a:centos:centos:openssh-keycat, p-cpe:/a:centos:centos:openssh-ldap, p-cpe:/a:centos:centos:openssh-server, p-cpe:/a:centos:centos:openssh-server-sysvinit, p-cpe:/a:centos:centos:pam_ssh_agent_auth, cpe:/o:centos:centos:7

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/01/14

Reference Information

CVE: CVE-2016-0777, CVE-2016-0778

RHSA: 2016:0043