RHEL 7 : libvirt (RHSA-2016:2577)

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

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

Description :

An update for libvirt 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 libvirt library contains a C API for managing and interacting with
the virtualization capabilities of Linux and other operating systems.
In addition, libvirt provides tools for remote management of
virtualized systems.

The following packages have been upgraded to a newer upstream version:
libvirt (2.0.0). (BZ#830971, BZ#1286679)

Security Fix(es) :

* It was found that the libvirt daemon, when using RBD (RADOS Block
Device), leaked private credentials to the process list. A local
attacker could use this flaw to perform certain privileged operations
within the cluster. (CVE-2015-5160)

* A path-traversal flaw was found in the way the libvirt daemon
handled filesystem names for storage volumes. A libvirt user with
privileges to create storage volumes and without privileges to create
and modify domains could possibly use this flaw to escalate their
privileges. (CVE-2015-5313)

* It was found that setting a VNC password to an empty string in
libvirt did not disable all access to the VNC server as documented,
instead it allowed access with no authentication required. An attacker
could use this flaw to access a VNC server with an empty VNC password
without any authentication. (CVE-2016-5008)

Additional Changes :

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.3 Release Notes linked from the References section.

See also :

https://www.redhat.com/security/data/cve/CVE-2015-5160.html
https://www.redhat.com/security/data/cve/CVE-2015-5313.html
https://www.redhat.com/security/data/cve/CVE-2016-5008.html
http://www.nessus.org/u?e4086253
http://rhn.redhat.com/errata/RHSA-2016-2577.html

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 4.3
(CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N)
CVSS Temporal Score : 3.6
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 94540 ()

Bugtraq ID:

CVE ID: CVE-2015-5160
CVE-2015-5313
CVE-2016-5008

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