RHEL 6 : rhev-hypervisor6 (RHSA-2012:1325)

This script is Copyright (C) 2014-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing a security update.

Description :

An updated rhev-hypervisor6 package that fixes multiple security
issues and one bug is now available.

The Red Hat Security Response Team has rated this update as having
important 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.

The rhev-hypervisor6 package provides a Red Hat Enterprise
Virtualization Hypervisor ISO disk image. The Red Hat Enterprise
Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine
(KVM) hypervisor. It includes everything necessary to run and manage
virtual machines: A subset of the Red Hat Enterprise Linux operating
environment and the Red Hat Enterprise Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available
for the Intel 64 and AMD64 architectures with virtualization
extensions.

A flaw was found in the way QEMU handled VT100 terminal escape
sequences when emulating certain character devices. A guest user with
privileges to write to a character device that is emulated on the host
using a virtual console back-end could use this flaw to crash the
qemu-kvm process on the host or, possibly, escalate their privileges
on the host. (CVE-2012-3515)

This flaw did not affect the default use of Red Hat Enterprise
Virtualization Hypervisor: it is not possible to add a device that
uses a virtual console back-end via Red Hat Enterprise Virtualization
Manager.

To specify a virtual console back-end for a device and therefore be
vulnerable to this issue, the device would have to be created another
way, for example, by using a VDSM hook. Note that at this time hooks
can only be used on Red Hat Enterprise Linux hosts, not Red Hat
Enterprise Virtualization Hypervisor.

Multiple integer overflow flaws, leading to stack-based buffer
overflows, were found in glibc's functions for converting a string to
a numeric representation (strtod(), strtof(), and strtold()). If an
application used such a function on attacker controlled input, it
could cause the application to crash or, potentially, execute
arbitrary code. (CVE-2012-3480)

Red Hat would like to thank the Xen project for reporting the
CVE-2012-3515 issue.

This updated package provides updated components that include fixes
for various security issues. These issues have no security impact on
Red Hat Enterprise Virtualization Hypervisor itself, however. The
security fixes included in this update address the following CVE
numbers :

CVE-2012-4244 (bind issue)

CVE-2012-3524 (dbus issue)

CVE-2012-2313, CVE-2012-2384, CVE-2012-2390, CVE-2012-3430, and
CVE-2012-3552 (kernel issues)

CVE-2012-3445 (libvirt issue)

CVE-2011-3102 and CVE-2012-2807 (libxml2 issues)

CVE-2011-1202, CVE-2011-3970, CVE-2012-2825, CVE-2012-2870,
CVE-2012-2871, and CVE-2012-2893 (libxslt issues)

This updated Red Hat Enterprise Virtualization Hypervisor package also
fixes the following bug :

* Previously, the Manager listed all installed Hypervisor ISO images
as available even when they did not support the VDSM compatibility
version required by the selected host. The rhev-hypervisor6 package
now maintains a text file for each installed ISO image. The file lists
the VDSM compatibility versions supported by the relevant ISO image.
The Manager uses this information to ensure that only those Hypervisor
ISO images that are relevant to the selected host are listed.
(BZ#856827)

Users of the Red Hat Enterprise Virtualization Hypervisor are advised
to upgrade to this updated package, which fixes these issues.

See also :

https://www.redhat.com/security/data/cve/CVE-2012-3480.html
https://www.redhat.com/security/data/cve/CVE-2012-3515.html
http://www.nessus.org/u?88371879
http://www.nessus.org/u?faae67f0
http://rhn.redhat.com/errata/RHSA-2012-1325.html
http://www.nessus.org/u?1ac5a746
http://www.nessus.org/u?879a0985

Solution :

Update the affected rhev-hypervisor6 package.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.3
(CVSS2#E:ND/RL:OF/RC:ND)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 78935 ()

Bugtraq ID: 54982
55413

CVE ID: CVE-2012-3480
CVE-2012-3515

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