(Red Hat Issues Fix) KVM E1000 NIC Emulation Heap Overflow Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID: 1026715|
SecurityTracker URL: http://securitytracker.com/id/1026715
(Links to External Site)
Date: Feb 21 2012
Denial of service via local system, User access via local system|
Fix Available: Yes Vendor Confirmed: Yes |
A vulnerability was reported in KVM. A local privileged user on the guest system can obtain elevated privileges on the target host system.|
A local privileged user on the guest operating system can send specially crafted legacy mode packets to trigger a heap overflow in the E1000 network interface card (NIC) emulation and cause the host system to crash.
A local privileged user may be able to exploit this to obtain privileges on the host system.
Nicolae Mogoreanu reported this vulnerability.
A local privileged user on the guest system can cause denial of service conditions on the target host system.|
A local privileged user on the guest system can obtain elevated privileges on the target host system.
Red Hat has issued a fix.|
The Red Hat advisory is available at:
Vendor URL: linux-kvm.org/ (Links to External Site)
|Underlying OS: Linux (Red Hat Enterprise)|
|Underlying OS Comments: 5|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [RHSA-2012:0168-01] Important: rhev-hypervisor5 security and bug fix update|
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Red Hat Security Advisory
Synopsis: Important: rhev-hypervisor5 security and bug fix update
Advisory ID: RHSA-2012:0168-01
Product: Red Hat Enterprise Virtualization
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0168.html
Issue date: 2012-02-21
CVE Names: CVE-2011-4109 CVE-2011-4576 CVE-2011-4619
An updated rhev-hypervisor5 package that fixes several 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.
2. Relevant releases/architectures:
RHEV Hypervisor for RHEL-5 - noarch
The rhev-hypervisor5 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
A divide-by-zero flaw was found in the Linux kernel's igmp_heard_query()
function. An attacker able to send certain IGMP (Internet Group Management
Protocol) packets to a target system could use this flaw to cause a denial
of service. (CVE-2012-0207)
A double free flaw was discovered in the policy checking code in OpenSSL.
A remote attacker could use this flaw to crash an application that uses
OpenSSL by providing an X.509 certificate that has specially-crafted
policy extension data. (CVE-2011-4109)
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.
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.
Red Hat would like to thank Nicolae Mogoreanu for reporting CVE-2012-0029,
and Simon McVittie for reporting CVE-2012-0207.
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-2006-1168 and CVE-2011-2716 (busybox issues)
CVE-2009-5029, CVE-2009-5064, CVE-2010-0830 and CVE-2011-1089 (glibc
CVE-2011-1083, CVE-2011-3638, CVE-2011-4086, CVE-2011-4127 and
CVE-2012-0028 (kernel issues)
CVE-2011-1526 (krb5 issue)
CVE-2011-4347 (kvm issue)
CVE-2010-4008, CVE-2011-0216, CVE-2011-2834, CVE-2011-3905, CVE-2011-3919
and CVE-2011-1944 (libxml2 issues)
CVE-2011-1749 (nfs-utils issue)
CVE-2011-4108 (openssl issue)
CVE-2011-0010 (sudo issue)
CVE-2011-1675 and CVE-2011-1677 (util-linux issues)
CVE-2010-0424 (vixie-cron issue)
This updated rhev-hypervisor5 package fixes various bugs. Documentation of
these changes will be available shortly in the Technical Notes document:
Users of Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package, which fixes these issues.
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
5. Bugs fixed (http://bugzilla.redhat.com/):
606191 - after upgrade , reboot can't shut off network successfully and back to firstboot menu again
627538 - System will not boot sometimes when using rhevm to do upgrade twice.
650179 - rhevm bridge came up instead of breth0 after fail to configure network
675325 - Changes to networking always clear the contents of resolv.conf
696875 - RHEVH bootup hanging in ovirt-early when doing LVM scanning
717535 - [RFE] No confirm message for ntp server setting
728895 - RHEV-H rpm should include a versions text file
732948 - CCISS: Auto install fail at creating physical volume.
734110 - rhevh - upgrade ovirt node fails due to nonexistent breth0
734480 - [RFE] Add virt-who package to RHEVH
734710 - Register RHN satellite will fail if RHN satellite password include space.
740127 - Provide our CPE name in a new system file
743938 - Make rhev-hypervisor RPM multi-installable like the kernel
747519 - RHEV-H 5.8 register to RHN will fail.
747647 - Change rhev-hypervisor RPM to be rhev-hypervisor5 to allow coinstallations with rhev-hypervisor6
756178 - remove redundant brcm-iscsi.log rotation from ovirt-node now that it is in iscsi-initiator-utils
758465 - RHEV-H 5.8 register to RHN will fail if password contains quotes or spaces
759462 - Can not retrieve running guests UUID in RHEVH node.
759632 - virt-who debugging output going to stderr always
759635 - Revert workaround of virt-who output
761357 - Multipathd service is stopped by default cause change password failed in single mode.
768256 - network layout is incorrect when configure network with nic up
771771 - CVE-2011-4109 openssl: double-free in policy checks
771775 - CVE-2011-4576 openssl: uninitialized SSL 3.0 padding
771780 - CVE-2011-4619 openssl: SGC restart DoS attack
772075 - CVE-2012-0029 qemu-kvm: e1000: process_tx_desc legacy mode packets heap overflow
772867 - CVE-2012-0207 kernel: igmp: Avoid zero delay when receiving odd mixture of IGMP queries
783625 - The setup command should only allow password setting and viewing logs in single mode.
6. Package List:
RHEV Hypervisor for RHEL-5:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2012 Red Hat, Inc.
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