[RHSA-2016:0277-01] Critical: rhev-hypervisor security update

[bugzilla at redhat.com]

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                   Red Hat Security Advisory

Synopsis:          Critical: rhev-hypervisor security update
Advisory ID:       RHSA-2016:0277-01
Product:           Red Hat Enterprise Virtualization
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2016-0277.html
Issue date:        2016-02-19
CVE Names:         CVE-2015-7547 
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1. Summary:

Updated rhev-hypervisor packages that fix one security issue are now
available.

Red Hat Product Security has rated this update as having Critical security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

2. Relevant releases/architectures:

RHEL 7-based RHEV-H - noarch
RHEV Hypervisor for RHEL-6 - noarch

3. Description:

The rhev-hypervisor 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 stack-based buffer overflow was found in the way the libresolv library
performed dual A/AAAA DNS queries. A remote attacker could create a
specially crafted DNS response which could cause libresolv to crash or,
potentially, execute code with the permissions of the user running the
library. Note: this issue is only exposed when libresolv is called from the
nss_dns NSS service module. (CVE-2015-7547)

This issue was discovered by the Google Security Team and Red Hat.

Users of Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to these updated packages.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1293532 - CVE-2015-7547 glibc: getaddrinfo stack-based buffer overflow

6. Package List:

RHEV Hypervisor for RHEL-6:

Source:
rhev-hypervisor7-7.2-20160105.2.el6ev.src.rpm

noarch:
rhev-hypervisor6-6.7-20160104.2.el6ev.noarch.rpm
rhev-hypervisor7-7.2-20160105.2.el6ev.noarch.rpm

RHEL 7-based RHEV-H:

Source:
rhev-hypervisor7-7.2-20160105.2.el7ev.src.rpm

noarch:
rhev-hypervisor7-7.2-20160105.2.el7ev.noarch.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2015-7547
https://access.redhat.com/security/updates/classification/#critical
https://access.redhat.com/articles/2161461

8. Contact:

The Red Hat security contact is <secalert at redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2016 Red Hat, Inc.
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