Oracle Linux 7 : openssh (ELSA-2016-0465)

High Nessus Plugin ID 90074

Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

From Red Hat Security Advisory 2016:0465 :

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.

It was discovered that the OpenSSH server did not sanitize data received in requests to enable X11 forwarding. An authenticated client with restricted SSH access could possibly use this flaw to bypass intended restrictions. (CVE-2016-3115)

An access flaw was discovered in OpenSSH; the OpenSSH client did not correctly handle failures to generate authentication cookies for untrusted X11 forwarding. A malicious or compromised remote X application could possibly use this flaw to establish a trusted connection to the local X server, even if only untrusted X11 forwarding was requested. (CVE-2016-1908)

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

https://oss.oracle.com/pipermail/el-errata/2016-March/005876.html

Plugin Details

Severity: High

ID: 90074

File Name: oraclelinux_ELSA-2016-0465.nasl

Version: 2.10

Type: local

Agent: unix

Published: 2016/03/22

Updated: 2018/07/24

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.5

Temporal Score: 5.9

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

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

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2016/03/21

Reference Information

CVE: CVE-2016-1908, CVE-2016-3115

RHSA: 2016:0465