SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (Generic)  >   Red Hat Enterprise Virtualization Vendors:   Red Hat
Red Hat Enterprise Virtualization Hypervisor XML Character Filtering Bug Lets Local Users Deny Service
SecurityTracker Alert ID:  1028955
SecurityTracker URL:  http://securitytracker.com/id/1028955
CVE Reference:   CVE-2013-0167, CVE-2013-4236   (Links to External Site)
Date:  Aug 28 2013
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Red Hat Enterprise Virtualization Hypervisor. A local privileged user on the guest system can cause denial of service conditions.

A local privileged user on the guest operating system can cause the target host operating system to become unavailable to the management server.

Specially crafted fields in the guestInfo dictionary can trigger this flaw.

Dan Kenigsberg of the Red Hat Enterprise Virtualization team reported this vulnerability. David Gibson of Red Hat reported that the initial fix was incomplete.

Impact:   A local privilege user on the guest system can cause the host system to become unavailable to the management server.
Solution:   The vendor has issued a fix.

The original fix for CVE-2013-0167 issued via RHSA-2013:0907 was incomplete [CVE-2013-4236]. A new fix has been issued via RHSA-2013:1181.

The vendor's advisory is available at:

https://rhn.redhat.com/errata/RHSA-2013-1181.html

Cause:   Input validation error
Underlying OS:  Linux (Red Hat Enterprise)

Message History:   None.


 Source Message Contents

Subject:  [RHSA-2013:1181-01] Moderate: rhev-hypervisor6 security and bug fix update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

Synopsis:          Moderate: rhev-hypervisor6 security and bug fix update
Advisory ID:       RHSA-2013:1181-01
Product:           Red Hat Enterprise Virtualization
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2013-1181.html
Issue date:        2013-08-27
CVE Names:         CVE-2013-0791 CVE-2013-1620 CVE-2013-4236 
=====================================================================

1. Summary:

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

The Red Hat Security Response Team has rated this update as having moderate
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.

Upgrade Note: If you upgrade the Red Hat Enterprise Virtualization
Hypervisor through the 3.2 Manager administration portal, the Host may
appear with the status of "Install Failed". If this happens, place the host
into maintenance mode, then activate it again to get the host back to an
"Up" state.

It was discovered that NSS leaked timing information when decrypting
TLS/SSL and DTLS protocol encrypted records when CBC-mode cipher suites
were used. A remote attacker could possibly use this flaw to retrieve plain
text from the encrypted packets by using a TLS/SSL or DTLS server as a
padding oracle. (CVE-2013-1620)

It was found that the fix for CVE-2013-0167 released via RHSA-2013:0907
was incomplete. A privileged guest user could potentially use this flaw to
make the host the guest is running on unavailable to the management
server. (CVE-2013-4236)

An out-of-bounds memory read flaw was found in the way NSS decoded certain
certificates. If an application using NSS decoded a malformed certificate,
it could cause the application to crash. (CVE-2013-0791)

Red Hat would like to thank the Mozilla project for reporting
CVE-2013-0791. Upstream acknowledges Ambroz Bizjak as the original reporter
of CVE-2013-0791. The CVE-2013-4236 issue was found by David Gibson of Red
Hat.

This updated package 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-2013-4854 (bind issue)

CVE-2012-6544, CVE-2013-2146, CVE-2013-2206, CVE-2013-2224, CVE-2013-2232,
and CVE-2013-2237 (kernel issues)

This update also contains the fixes from the following errata:

* vdsm: RHSA-2013:1155 and RHBA-2013:1158

Users of the Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package, which corrects these issues.

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 (http://bugzilla.redhat.com/):

908234 - CVE-2013-1620 nss: TLS CBC padding timing attack
946947 - CVE-2013-0791 Mozilla: Out-of-bounds array read in CERT_DecodeCertPackage (MFSA 2013-40)
996166 - CVE-2013-4236 vdsm: incomplete fix for CVE-2013-0167 issue
996584 - rhev-hypervisor 6.4 Update 5 release

6. Package List:

RHEV Hypervisor for RHEL-6:

noarch:
rhev-hypervisor6-6.4-20130815.0.el6_4.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-2013-0791.html
https://www.redhat.com/security/data/cve/CVE-2013-1620.html
https://www.redhat.com/security/data/cve/CVE-2013-4236.html
https://access.redhat.com/security/updates/classification/#moderate
https://rhn.redhat.com/errata/RHSA-2013-0907.html
https://rhn.redhat.com/errata/RHSA-2013-1155.html
https://rhn.redhat.com/errata/RHBA-2013-1158.html
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 2013 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)

iD8DBQFSHP6JXlSAg2UNWIIRAg6UAJ4nxSkCf0dBGP7gSE3IE99XE9pOowCdEkl9
lI6phlLhd3GjMhFQaFivVbI=
=QSdy
-----END PGP SIGNATURE-----


--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://www.redhat.com/mailman/listinfo/rhsa-announce
 
 


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2020, SecurityGlobal.net LLC