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Security Advisory Critical: rhev-hypervisor security update

Advisory: RHSA-2016:0277-1
Type: Security Advisory
Severity: Critical
Issued on: 2016-02-19
Last updated on: 2016-02-19
Affected Products: Red Hat Enterprise Virtualization 3
CVEs (cve.mitre.org): CVE-2015-7547

Details

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.

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.


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

Updated packages

Red Hat Enterprise Virtualization 3

SRPMS:
rhev-hypervisor7-7.2-20160105.2.el6ev.src.rpm
File outdated by:  RHEA-2016:1935
    MD5: 753627e3d395d5127c7b455afd1eedaf
SHA-256: 3c4b7a4cb7349e573b136f419f665c781b67d91243c44d90ab06f8da26d81fca
 
x86_64:
rhev-hypervisor6-6.7-20160104.2.el6ev.noarch.rpm
File outdated by:  RHEA-2016:1555
    MD5: 7a6d3baaa25071a9de521663136069d4
SHA-256: 10cec585df427fbfa4a386bb0d9d372aac123efd10d52c8e49d088f1f91caaa6
rhev-hypervisor7-7.2-20160105.2.el6ev.noarch.rpm
File outdated by:  RHEA-2016:1935
    MD5: 8379ba01eb95cb2b5aa15d004628b4b8
SHA-256: b66e707093f54d279b71b99896a9cba0855337af04104a9245242672a36851b9
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

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


References



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

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/