RHSA-2014:1168 - Security Advisory

Topic

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

Red Hat Product Security 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.

Description

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 NULL pointer dereference flaw was found in the way the Linux kernel's
networking implementation handled logging while processing certain invalid
packets coming in via a VxLAN interface. A remote attacker could use this
flaw to crash the system by sending a specially crafted packet to such an
interface. (CVE-2014-3535)

Two integer overflow flaws were found in the QEMU block driver for QCOW
version 1 disk images. A user able to alter the QEMU disk image files
loaded by a guest could use either of these flaws to corrupt QEMU process
memory on the host, which could potentially result in arbitrary code
execution on the host with the privileges of the QEMU process.
(CVE-2014-0222, CVE-2014-0223)

Red Hat would like to thank NSA for reporting CVE-2014-0222 and
CVE-2014-0223.

This update also fixes the following bug:

• Previously, an updated version of Qlogic firmware was not supported in

the Red Hat Enterprise Virtualization Hypervisor 6.5 image and an error
message returned when users were using a newer version of Qlogic firmware.
This update includes the latest Qlogic firmware package in the Red Hat
Enterprise Virtualization Hypervisor 6.5 image so no firmware errors are
returned. (BZ#1135780)

This updated package also 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-2012-6647, CVE-2013-7339, CVE-2014-2672, CVE-2014-2678, CVE-2014-2706,
CVE-2014-2851, CVE-2014-3144, CVE-2014-3145, CVE-2014-0205, CVE-2014-3917,
and CVE-2014-4667 (kernel issues)

Users of the Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package.

Solution

This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
https://access.redhat.com/articles/11258

To upgrade Hypervisors in Red Hat Enterprise Virtualization environments
using the disk image provided by this package, refer to:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Hypervisor_Deployment_Guide/chap-Deployment_Guide-Upgrading_Red_Hat_Enterprise_Virtualization_Hypervisors.html

Affected Products

• Red Hat Virtualization 6 x86_64

Fixes

• BZ - 1097216 - CVE-2014-0222 Qemu: qcow1: validate L2 table size to avoid integer overflows
• BZ - 1097222 - CVE-2014-0223 Qemu: qcow1: validate image size to avoid out-of-bounds memory access
• BZ - 1114540 - CVE-2014-3535 Kernel: netdevice.h: NULL pointer dereference over VxLAN
• BZ - 1127635 - Packaging for RHEV 3.4.2
• BZ - 1135780 - Requesting that a Qlogic firmware file be added to the RHEV-H 6.5 image.

CVEs

• CVE-2014-0223
• CVE-2014-0222
• CVE-2014-3535

References

• https://access.redhat.com/security/updates/classification/#important