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Red Hat 6.5 RHSA-2015:1031-01 Important: qemu-kvm Out-Of-Bounds Issue

red hat
Calendar Grey May 27, 2015
Dist Redhat Esm H88
Revamped qemu-kvm updates for Red Hat 6.5 address critical security vulnerabilities, enhancing protection for virtualized setups.
Updated qemu-kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 6.5 Extended Update Support

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

Summary

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.
An out-of-bounds memory access flaw was found in the way QEMU's virtual Floppy Disk Controller (FDC) handled FIFO buffer access while processing certain FDC commands. A privileged guest user could use this flaw to crash the guest or, potentially, execute arbitrary code on the host with the privileges of the host's QEMU process corresponding to the guest. (CVE-2015-3456)
Red Hat would like to thank Jason Geffner of CrowdStrike for reporting this issue.
All qemu-kvm users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. 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.

Topics%20covered

Topics Covered

security advisory Red Hat important issue out-of-bounds qemu-kvm HPC Node Server EUS

References

https://access.redhat.com/security/cve/CVE-2015-3456 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux HPC Node EUS (v. 6.5):
Source: qemu-kvm-0.12.1.2-2.415.el6_5.15.src.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.415.el6_5.15.x86_64.rpm qemu-img-0.12.1.2-2.415.el6_5.15.x86_64.rpm qemu-kvm-0.12.1.2-2.415.el6_5.15.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.15.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.415.el6_5.15.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 6.5):
Source: qemu-kvm-0.12.1.2-2.415.el6_5.15.src.rpm
i386: qemu-guest-agent-0.12.1.2-2.415.el6_5.15.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.15.i686.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.415.el6_5.15.x86_64.rpm qemu-img-0.12.1.2-2.415.el6_5.15.x86_64.rpm qemu-kvm-0.12.1.2-2.415.el6_5.15.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.15.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.415.el6_5.15.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/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:1031-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:1031.html
Issue date: 2015-05-27

Topic

Updated qemu-kvm packages that fix one security issue are now available forRed Hat Enterprise Linux 6.5 Extended Update Support.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory Red Hat important issue out-of-bounds qemu-kvm HPC Node Server EUS

Relevant Releases Architectures

Red Hat Enterprise Linux HPC Node EUS (v. 6.5) - x86_64

Red Hat Enterprise Linux Server EUS (v. 6.5) - i386, x86_64

Bugs Fixed

1218611 - CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access

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