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Red Hat 6: RHSA-2015:1924-01 Important: qemu-kvm DoS Risk

red hat
Calendar Grey October 22, 2015
Dist Redhat Esm H88
Ubuntu patch for libvirt corrects a severe buffer overflow, improving protection for virtual machines against exploitation attempts.
Updated qemu-kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 6

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.
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 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 security update heap overflow Red Hat Enterprise DoS risk qemu-kvm

References

https://access.redhat.com/security/cve/CVE-2015-5279 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: qemu-kvm-0.12.1.2-2.479.el6_7.2.src.rpm
i386: qemu-guest-agent-0.12.1.2-2.479.el6_7.2.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.2.i686.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-img-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-kvm-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.479.el6_7.2.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: qemu-kvm-0.12.1.2-2.479.el6_7.2.src.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-img-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-kvm-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.479.el6_7.2.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source: qemu-kvm-0.12.1.2-2.479.el6_7.2.src.rpm
i386: qemu-guest-agent-0.12.1.2-2.479.el6_7.2.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.2.i686.rpm
ppc64: qemu-guest-agent-0.12.1.2-2.479.el6_7.2.ppc64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.2.ppc64.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-img-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-kvm-0.12.1.2-2.479.el6_7.2.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.2.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:1924-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:1924.html
Issue date: 2015-10-22

Topic

Updated qemu-kvm packages that fix one security issue are now available forRed Hat Enterprise Linux 6.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 security update heap overflow Red Hat Enterprise DoS risk qemu-kvm

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, ppc64, x86_64

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

Bugs Fixed

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

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