Oracle Linux 7 : gdm / gnome-session (ELSA-2017-2128)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

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

Description :

From Red Hat Security Advisory 2017:2128 :

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.

See also :

https://oss.oracle.com/pipermail/el-errata/2017-August/007088.html

Solution :

Update the affected gdm and / or gnome-session packages.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.0
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Oracle Linux Local Security Checks

Nessus Plugin ID: 102297 ()

Bugtraq ID:

CVE ID: CVE-2015-7496

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