RHEL 7 : GNOME Shell (RHSA-2015:0535)

medium Nessus Plugin ID 81639

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Synopsis

The remote Red Hat host is missing a security update.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2015:0535 advisory.

GNOME Shell and the packages it depends upon provide the core user interface of the Red Hat Enterprise Linux desktop, including functions such as navigating between windows and launching applications.

It was found that the GNOME shell did not disable the Print Screen key when the screen was locked. This could allow an attacker with physical access to a system with a locked screen to crash the screen-locking application by creating a large amount of screenshots. (CVE-2014-7300)

This update also fixes the following bugs:

* The Timed Login feature, which automatically logs in a specified user after a specified period of time, stopped working after the first user of the GUI logged out. This has been fixed, and the specified user is always logged in if no one else logs in. (BZ#1043571)

* If two monitors were arranged vertically with the secondary monitor above the primary monitor, it was impossible to move windows onto the secondary monitor. With this update, windows can be moved through the upper edge of the first monitor to the secondary monitor. (BZ#1075240)

* If the Gnome Display Manager (GDM) user list was disabled and a user entered the user name, the password prompt did not appear. Instead, the user had to enter the user name one more time. The GDM code that contained this error has been fixed, and users can enter their user names and passwords as expected.
(BZ#1109530)

* Prior to this update, only a small area was available on the GDM login screen for a custom text banner.
As a consequence, when a long banner was used, it did not fit into the area, and the person reading the banner had to use scrollbars to view the whole text. With this update, more space is used for the banner if necessary, which allows the user to read the message conveniently. (BZ#1110036)

* When the Cancel button was pressed while an LDAP user name and password was being validated, the GDM code did not handle the situation correctly. As a consequence, GDM became unresponsive, and it was impossible to return to the login screen. The affected code has been fixed, and LDAP user validation can be canceled, allowing another user to log in instead. (BZ#1137041)

* If the window focus mode in GNOME was set to mouse or sloppy, navigating through areas of a pop-up menu displayed outside its parent window caused the window to lose its focus. Consequently, the menu was not usable. This has been fixed, and the window focus is kept in under this scenario. (BZ#1149585)

* If user authentication is configured to require a smart card to log in, user names are obtained from the smart card. The authentication is then performed by entering the smart card PIN. Prior to this update, the login screen allowed a user name to be entered if no smart card was inserted, but due to a bug in the underlying code, the screen became unresponsive. If, on the other hand, a smart card was used for authentication, the user was logged in as soon as the authentication was complete. As a consequence, it was impossible to select a session other than GNOME Classic. Both of these problems have been fixed. Now, a smart card is required when this type of authentication is enabled, and any other installed session can be selected by the user. (BZ#1159385, BZ#1163474)

In addition, this update adds the following enhancement:

* Support for quad-buffer OpenGL stereo visuals has been added. As a result, OpenGL applications that use quad-buffer stereo can be run and properly displayed within the GNOME desktop when used with a video driver and hardware with the necessary capabilities. (BZ#861507, BZ#1108890, BZ#1108891, BZ#1108893)

All GNOME Shell users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add this enhancement.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Medium

ID: 81639

File Name: redhat-RHSA-2015-0535.nasl

Version: 1.10

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 3/5/2015

Updated: 11/4/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2014-7300

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS:3.0/AV:P/AC:L/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:redhat:enterprise_linux:clutter-devel, p-cpe:/a:redhat:enterprise_linux:cogl-doc, p-cpe:/a:redhat:enterprise_linux:cogl-devel, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:clutter-doc, p-cpe:/a:redhat:enterprise_linux:mutter, p-cpe:/a:redhat:enterprise_linux:mutter-devel, p-cpe:/a:redhat:enterprise_linux:clutter, p-cpe:/a:redhat:enterprise_linux:gnome-shell, p-cpe:/a:redhat:enterprise_linux:cogl, p-cpe:/a:redhat:enterprise_linux:gnome-shell-browser-plugin

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

Patch Publication Date: 3/5/2015

Vulnerability Publication Date: 12/25/2014

Reference Information

CVE: CVE-2014-7300

CWE: 305

RHSA: 2015:0535

Detections

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