[RHSA-2014:1075-01] Moderate: qemu-kvm security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Moderate: qemu-kvm security and bug fix update

Advisory ID: RHSA-2014:1075-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-1075.html

Issue date: 2014-08-19

CVE Names: CVE-2014-0222 CVE-2014-0223

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1. Summary:

 

Updated qemu-kvm packages that fix two security issues and three bugs are

now available for Red Hat Enterprise Linux 6.

 

Red Hat Product Security 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:

 

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

 

3. Description:

 

KVM (Kernel-based Virtual Machine) is a full virtualization solution for

Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the

user-space component for running virtual machines using KVM.

 

Two integer overflow flaws were found in the QEMU block driver for QCOW

version 1 disk images. A user able to alter the QEMU disk image files

loaded by a guest could use either of these flaws to corrupt QEMU process

memory on the host, which could potentially result in arbitrary code

execution on the host with the privileges of the QEMU process.

(CVE-2014-0222, CVE-2014-0223)

 

Red Hat would like to thank NSA for reporting these issues.

 

This update also fixes the following bugs:

 

* In certain scenarios, when performing live incremental migration, the

disk size could be expanded considerably due to the transfer of unallocated

sectors past the end of the base image. With this update, the

bdrv_is_allocated() function has been fixed to no longer return "True" for

unallocated sectors, and the disk size no longer changes after performing

live incremental migration. (BZ#1109715)

 

* This update enables ioeventfd in virtio-scsi-pci. This allows QEMU to

process I/O requests outside of the vCPU thread, reducing the latency of

submitting requests and improving single task throughput. (BZ#1123271)

 

* Prior to this update, vendor-specific SCSI commands issued from a KVM

guest did not reach the target device due to QEMU considering such commands

as invalid. This update fixes this bug by properly propagating

vendor-specific SCSI commands to the target device. (BZ#1125131)

 

All qemu-kvm users are advised to upgrade to these updated packages, which

contain backported patches to correct these issues. After installing this

update, shut down all running virtual machines. Once all virtual machines

have shut down, start them again for this update to take effect.

 

4. 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/articles/11258

 

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

 

1097216 - CVE-2014-0222 Qemu: qcow1: validate L2 table size to avoid integer overflows

1097222 - CVE-2014-0223 Qemu: qcow1: validate image size to avoid out-of-bounds memory access

1109715 - live incremental migration of vm with common shared base, size(disk) > size(base) transfers unallocated sectors, explodes disk on dest

1123271 - Enable ioenventfd for virtio-scsi-pci

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

qemu-kvm-0.12.1.2-2.415.el6_5.14.src.rpm

 

i386:

qemu-guest-agent-0.12.1.2-2.415.el6_5.14.i686.rpm

qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.14.i686.rpm

 

x86_64:

qemu-guest-agent-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-img-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.415.el6_5.14.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node (v. 6):

 

Source:

qemu-kvm-0.12.1.2-2.415.el6_5.14.src.rpm

 

x86_64:

qemu-guest-agent-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-img-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.415.el6_5.14.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

qemu-kvm-0.12.1.2-2.415.el6_5.14.src.rpm

 

i386:

qemu-guest-agent-0.12.1.2-2.415.el6_5.14.i686.rpm

qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.14.i686.rpm

 

x86_64:

qemu-guest-agent-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-img-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.415.el6_5.14.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

qemu-kvm-0.12.1.2-2.415.el6_5.14.src.rpm

 

i386:

qemu-guest-agent-0.12.1.2-2.415.el6_5.14.i686.rpm

qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.14.i686.rpm

 

x86_64:

qemu-guest-agent-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-img-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.14.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.415.el6_5.14.x86_64.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-2014-0222.html

https://www.redhat.com/security/data/cve/CVE-2014-0223.html

https://access.redhat.com/security/updates/classification/#moderate

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2014 Red Hat, Inc.

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