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RHEL 7 : gdm and gnome-session (RHSA-2017:2128)

high Nessus Plugin ID 102113

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Synopsis

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

Description

An update for gdm and gnome-session is now available for Red Hat Enterprise Linux 7.

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.

The GNOME Display Manager (GDM) provides the graphical login screen shown shortly after boot up, log out, and when user-switching.

The following packages have been upgraded to a later upstream version:
gdm (3.22.3), gnome-session (3.22.3). (BZ#1386862, BZ#1386957)

Security Fix(es) :

* It was found that gdm could crash due to a signal handler dispatched to an invalid conversation. An attacker could crash gdm by holding the escape key when the screen is locked, possibly bypassing the locked screen. (CVE-2015-7496)

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?3395ff0b

https://access.redhat.com/errata/RHSA-2017:2128

https://access.redhat.com/security/cve/cve-2015-7496

Plugin Details

Severity: High

ID: 102113

File Name: redhat-RHSA-2017-2128.nasl

Version: 3.11

Type: local

Agent: unix

Published: 8/2/2017

Updated: 10/24/2019

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

Risk Information

VPR

Risk Factor: Low

Score: 3.4

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:gdm, p-cpe:/a:redhat:enterprise_linux:gnome-session-custom-session, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:7.4, cpe:/o:redhat:enterprise_linux:7.5, p-cpe:/a:redhat:enterprise_linux:gnome-session, p-cpe:/a:redhat:enterprise_linux:gdm-devel, p-cpe:/a:redhat:enterprise_linux:gdm-debuginfo, p-cpe:/a:redhat:enterprise_linux:gnome-session-xsession, cpe:/o:redhat:enterprise_linux:7.7, p-cpe:/a:redhat:enterprise_linux:gnome-session-debuginfo, cpe:/o:redhat:enterprise_linux:7.6

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: 8/1/2017

Vulnerability Publication Date: 11/24/2015

Reference Information

CVE: CVE-2015-7496

RHSA: 2017:2128