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Security Advisory Important: rhev-hypervisor6 security and bug fix update

Advisory: RHSA-2012:0109-1
Type: Security Advisory
Severity: Important
Issued on: 2012-02-15
Last updated on: 2012-02-15
Affected Products: Red Hat Enterprise Virtualization 3
CVEs (cve.mitre.org): CVE-2011-4576
CVE-2011-4577
CVE-2011-4619
CVE-2012-0029

Details

An updated rhev-hypervisor6 package that fixes multiple security issues and
various bugs 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.

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 heap overflow flaw was found in the way QEMU-KVM emulated the e1000
network interface card. A privileged guest user in a virtual machine whose
network interface is configured to use the e1000 emulated driver could use
this flaw to crash the host or, possibly, escalate their privileges on the
host. (CVE-2012-0029)

An information leak flaw was found in the SSL 3.0 protocol implementation
in OpenSSL. Incorrect initialization of SSL record padding bytes could
cause an SSL client or server to send a limited amount of possibly
sensitive data to its SSL peer via the encrypted connection.
(CVE-2011-4576)

A denial of service flaw was found in the RFC 3779 implementation in
OpenSSL. A remote attacker could use this flaw to make an application using
OpenSSL exit unexpectedly by providing a specially-crafted X.509
certificate that has malformed RFC 3779 extension data. (CVE-2011-4577)

It was discovered that OpenSSL did not limit the number of TLS/SSL
handshake restarts required to support Server Gated Cryptography. A remote
attacker could use this flaw to make a TLS/SSL server using OpenSSL consume
an excessive amount of CPU by continuously restarting the handshake.
(CVE-2011-4619)

Red Hat would like to thank Nicolae Mogoreanu for reporting CVE-2012-0029.

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-2009-5029 and CVE-2011-4609 (glibc issues)

CVE-2012-0056 (kernel issue)

CVE-2011-4108 and CVE-2012-0050 (openssl issues)

This update also fixes the following bugs:

* Previously, it was possible to begin a Hypervisor installation without
any valid disks to install to.

Now, if no valid disks are found for Hypervisor installation, a message is
displayed informing the user that there are no valid disks for
installation. (BZ#781471)

* Previously, the user interface for the Hypervisor did not indicate
whether the system was registered with Red Hat Network (RHN) Classic or RHN
Satellite. As a result, customers could not easily determine the
registration status of their Hypervisor installations.

The TUI has been updated to display the registration status of the
Hypervisor. (BZ#788223)

* Previously, autoinstall would fail if the firstboot or reinstall options
were passed but local_boot or upgrade were not passed. Now, neither the
local_boot or upgrade parameters are required for autoinstall. (BZ#788225)

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


Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

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/kb/docs/DOC-11259

Updated packages

Red Hat Enterprise Virtualization 3

SRPMS:
rhev-hypervisor6-6.2-20120209.0.el6_2.src.rpm
File outdated by:  RHSA-2014:0378
    MD5: 63fe042fdd10acf015d3f494d2ddd439
SHA-256: 77e20bf59a6b55db338e4ec170ebc7c5e1f27439e3330dffa084b121ab407fdc
 
x86_64:
rhev-hypervisor6-6.2-20120209.0.el6_2.noarch.rpm
File outdated by:  RHSA-2014:0378
    MD5: 075bc541ec6a4a278edcd4374c47a558
SHA-256: 0983c126f4a542c3024341886d4ed57d3bf2a38870204d8e671e6d16061425f9
rhev-hypervisor6-tools-6.2-20120209.0.el6_2.noarch.rpm
File outdated by:  RHSA-2012:1375
    MD5: 8a7b1b1e7137e36dc7dc2b7c55fdf933
SHA-256: cc32885868308b54332803690445f689b79b2a4abfaa96ee40ad315b529e9a54
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

771775 - CVE-2011-4576 openssl: uninitialized SSL 3.0 padding
771778 - CVE-2011-4577 openssl: malformed RFC 3779 data can cause assertion failures
771780 - CVE-2011-4619 openssl: SGC restart DoS attack
772075 - CVE-2012-0029 qemu-kvm: e1000: process_tx_desc legacy mode packets heap overflow
781472 - Subscription Asset Manager options should be disabled if network is disable.
788225 - autoinstall fails when local_boot or upgrade not passed on command line
788226 - rhev-hypervisor6 6.2 Update 2 Release bugzilla


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/