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Red Hat EL 6: RHSA-2013-0620-01 Urgent qemu-kvm Resource Exhaustion

red hat
Calendar Grey March 7, 2013
Scroller Redhat
Essential qemu-kvm patch for Red Hat addressed a vulnerability that posed significant risks and allowed for remote exploitation.
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.

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/knowledge/articles/11258

Summary

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component for running virtual machines using KVM.
A flaw was found in the way QEMU-KVM emulated the e1000 network interface card when the host was configured to accept jumbo network frames, and a guest using the e1000 emulated driver was not. A remote attacker could use this flaw to crash the guest or, potentially, execute arbitrary code with root privileges in the guest. (CVE-2012-6075)
All users of qemu-kvm should upgrade to these updated packages, which contain backported patches 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 critical Red Hat Enterprise Linux remote execution memory leak qemu-kvm

References

https://access.redhat.com/security/cve/CVE-2012-6075 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: qemu-guest-agent-0.12.1.2-2.355.el6_4.2.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.355.el6_4.2.i686.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-img-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-kvm-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.355.el6_4.2.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
x86_64: qemu-guest-agent-win32-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.355.el6_4.2.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64: qemu-guest-agent-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-img-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-kvm-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.355.el6_4.2.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
x86_64: qemu-guest-agent-win32-0.12.1.2-2.355.el6_4.2.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.355.el6_4.2.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
i386: qemu-guest-agent-0.12.1.2-2.355.el6_4.2.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.355.el6_4.2.i686.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.355.el6_4.2.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2013:0609-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:0609.html
Issue date: 2013-03-07

Topic

Updated qemu-kvm packages that fix one security issue are now available forRed Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory security update critical Red Hat Enterprise Linux remote execution memory leak qemu-kvm

Relevant Releases Architectures

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

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

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

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

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

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

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

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

Bugs Fixed

889301 - CVE-2012-6075 qemu: e1000 driver buffer overflow when processing large packets when SBP and LPE flags are disabled

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