Synopsis

Important: kvm security update

Type/Severity

Security Advisory: Important

Topic

Updated kvm packages that fix one security issue are now available for Red
Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Important security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

Description

KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems.

A heap buffer overflow flaw was found in the way QEMU's NE2000 NIC
emulation implementation handled certain packets received over the network.
A privileged user inside a guest could use this flaw to crash the QEMU
instance (denial of service) or potentially execute arbitrary code on
the host. (CVE-2015-5279)

Red Hat would like to thank Qinghao Tang of QIHU 360 Inc. for reporting
this issue.

All kvm users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. Note: The procedure in
the Solution section must be performed before this update will take effect.

Solution

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

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

The following procedure must be performed before this update will take
effect:

1) Stop all KVM guest virtual machines.

2) Either reboot the hypervisor machine or, as the root user, remove (using
"modprobe -r [module]") and reload (using "modprobe [module]") all of the
following modules which are currently running (determined using "lsmod"):
kvm, ksm, kvm-intel or kvm-amd.

3) Restart the KVM guest virtual machines.

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Workstation 5 x86_64

Fixes

• BZ - 1256672 - CVE-2015-5279 qemu: Heap overflow vulnerability in ne2000_receive() function

CVEs

• CVE-2015-5279

References

• https://access.redhat.com/security/updates/classification/#important

Red Hat Enterprise Linux Server 5

SRPM
kvm-83-274.el5_11.src.rpm	SHA-256: 9619f2a046162be4b82b1030e019b4dbb0ac0a9ffb09d22eec57ea42b7a1818d
x86_64
kmod-kvm-83-274.el5_11.x86_64.rpm	SHA-256: e323997d967306b7c4a07e17be76dffa5a3b6ef5c13800e9b8219ffca60ada57
kmod-kvm-debug-83-274.el5_11.x86_64.rpm	SHA-256: f08267080323515a6505e0ac1ace6e2505ae574a028ce79292e13c0c0d76d6fc
kvm-83-274.el5_11.x86_64.rpm	SHA-256: d639d1563200c7f7b4ecd8dc7a7119c8afca850a36cc9a81b26fdbf85b8e9b93
kvm-debuginfo-83-274.el5_11.x86_64.rpm	SHA-256: 583764fd5d01c9ef1db97a94bad367481409bed7b1bbede4c0da02365e329fec
kvm-qemu-img-83-274.el5_11.x86_64.rpm	SHA-256: fc9ae0e49aecbd461a78e1879c70f0f1b58db64a2d1dd4403c857f29cd4db9c0
kvm-tools-83-274.el5_11.x86_64.rpm	SHA-256: 4451129515574d847917e65ec054c7743866c112faa3d9b094df2d2dd65942d1

Red Hat Enterprise Linux Workstation 5

SRPM
kvm-83-274.el5_11.src.rpm	SHA-256: 9619f2a046162be4b82b1030e019b4dbb0ac0a9ffb09d22eec57ea42b7a1818d
x86_64
kmod-kvm-83-274.el5_11.x86_64.rpm	SHA-256: e323997d967306b7c4a07e17be76dffa5a3b6ef5c13800e9b8219ffca60ada57
kmod-kvm-debug-83-274.el5_11.x86_64.rpm	SHA-256: f08267080323515a6505e0ac1ace6e2505ae574a028ce79292e13c0c0d76d6fc
kvm-83-274.el5_11.x86_64.rpm	SHA-256: d639d1563200c7f7b4ecd8dc7a7119c8afca850a36cc9a81b26fdbf85b8e9b93
kvm-debuginfo-83-274.el5_11.x86_64.rpm	SHA-256: 583764fd5d01c9ef1db97a94bad367481409bed7b1bbede4c0da02365e329fec
kvm-qemu-img-83-274.el5_11.x86_64.rpm	SHA-256: fc9ae0e49aecbd461a78e1879c70f0f1b58db64a2d1dd4403c857f29cd4db9c0
kvm-tools-83-274.el5_11.x86_64.rpm	SHA-256: 4451129515574d847917e65ec054c7743866c112faa3d9b094df2d2dd65942d1