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Red Hat Product Errata RHSA-2014:0815 - Security Advisory
Issued:
2014-06-30
Updated:
2014-06-30

RHSA-2014:0815 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: rhev-hypervisor6 security update

Type/Severity

Security Advisory: Important

Topic

An updated rhev-hypervisor6 package that fixes several security issues 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.

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 flaw was found in the way GnuTLS parsed session IDs from ServerHello
messages of the TLS/SSL handshake. A malicious server could use this flaw
to send an excessively long session ID value, which would trigger a buffer
overflow in a connecting TLS/SSL client application using GnuTLS, causing
the client application to crash or, possibly, execute arbitrary code.
(CVE-2014-3466)

It was discovered that the asn1_get_bit_der() function of the libtasn1
library incorrectly reported the length of ASN.1-encoded data. Specially
crafted ASN.1 input could cause an application using libtasn1 to perform
an out-of-bounds access operation, causing the application to crash or,
possibly, execute arbitrary code. (CVE-2014-3468)

Multiple incorrect buffer boundary check issues were discovered in
libtasn1. Specially crafted ASN.1 input could cause an application using
libtasn1 to crash. (CVE-2014-3467)

Multiple NULL pointer dereference flaws were found in libtasn1's
asn1_read_value() function. Specially crafted ASN.1 input could cause an
application using libtasn1 to crash, if the application used the
aforementioned function in a certain way. (CVE-2014-3469)

Red Hat would like to thank GnuTLS upstream for reporting CVE-2014-3466,
CVE-2014-3468, CVE-2014-3467, and CVE-2014-3469. Upstream acknowledges
Joonas Kuorilehto of Codenomicon as the original reporter of CVE-2014-3466.

This updated package provides an updated kernel component that includes
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-2013-6378, CVE-2014-0203, CVE-2014-1737, CVE-2014-1738, CVE-2014-1874,
CVE-2014-2039 and CVE-2014-3153 (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/site/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/site/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 - 1101932 - CVE-2014-3466 gnutls: insufficient session id length check in _gnutls_read_server_hello (GNUTLS-SA-2014-3)
  • BZ - 1102022 - CVE-2014-3467 libtasn1: multiple boundary check issues
  • BZ - 1102323 - CVE-2014-3468 libtasn1: asn1_get_bit_der() can return negative bit length
  • BZ - 1102329 - CVE-2014-3469 libtasn1: asn1_read_value_type() NULL pointer dereference
  • BZ - 1107789 - (rhevh-6.5.5) Packaging for RHEL 6.5 update 5 release

CVEs

  • CVE-2014-3467
  • CVE-2014-3466
  • CVE-2014-3469
  • CVE-2014-3468

References

  • https://access.redhat.com/security/updates/classification/#important
  • https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Hypervisor_Deployment_Guide/chap-Deployment_Guide-Upgrading_Red_Hat_Enterprise_Virtualization_Hypervisors.html
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Virtualization 6

SRPM
rhev-hypervisor6-6.5-20140624.0.el6ev.src.rpm SHA-256: 349376e2225e4acd32460a68713a3fcfd2f745a89ab799789529880482607b31
x86_64
rhev-hypervisor6-6.5-20140624.0.el6ev.noarch.rpm SHA-256: 3dc0f117f1abdb0c896b54a3b44900bc5688f0cb2240657d3f6dd84d1fd0fa3d

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

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