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Category:   Application (Generic)  >   Red Hat Enterprise Virtualization Vendors:   Red Hat
(Red Hat Issues Fix for Red Hat Enterprise Virtualization) Linux Kernel PI Futex Requeuing Bug Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1030502
SecurityTracker URL:  http://securitytracker.com/id/1030502
CVE Reference:   CVE-2014-3153   (Links to External Site)
Date:  Jul 1 2014
Impact:   Root access via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the Linux Kernel. A local user can obtain elevated privileges on the target system. Red Hat Enterprise Virtualization is affected.

A local user can can exploit a flaw in the requeuing of Priority Inheritance (PI) to PI futexes to gain elevated privileges on the target system.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   Red Hat has issued a fix for Red Hat Enterprise Virtualization.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2014-0815.html

Vendor URL:  www.kernel.org/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Jun 19 2014 Linux Kernel PI Futex Requeuing Bug Lets Local Users Gain Elevated Privileges



 Source Message Contents

Subject:  [RHSA-2014:0815-01] Important: rhev-hypervisor6 security update

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: rhev-hypervisor6 security update
Advisory ID:       RHSA-2014:0815-01
Product:           Red Hat Enterprise Virtualization
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2014-0815.html
Issue date:        2014-06-30
CVE Names:         CVE-2014-3466 CVE-2014-3467 CVE-2014-3468 
                   CVE-2014-3469 
=====================================================================

1. Summary:

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.

2. Relevant releases/architectures:

RHEV Hypervisor for RHEL-6 - noarch

3. 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.

4. 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

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

1101932 - CVE-2014-3466 gnutls: insufficient session id length check in _gnutls_read_server_hello (GNUTLS-SA-2014-3)
1102022 - CVE-2014-3467 libtasn1: multiple boundary check issues
1102323 - CVE-2014-3468 libtasn1: asn1_get_bit_der() can return negative bit length
1102329 - CVE-2014-3469 libtasn1: asn1_read_value_type() NULL pointer dereference
1107789 - (rhevh-6.5.5) Packaging for RHEL 6.5 update 5 release

6. Package List:

RHEV Hypervisor for RHEL-6:

noarch:
rhev-hypervisor6-6.5-20140624.0.el6ev.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/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2014-3466.html
https://www.redhat.com/security/data/cve/CVE-2014-3467.html
https://www.redhat.com/security/data/cve/CVE-2014-3468.html
https://www.redhat.com/security/data/cve/CVE-2014-3469.html
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

8. Contact:

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

Copyright 2014 Red Hat, Inc.
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