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Red Hat 6: RHSA-2011-0345 Moderate: Qemu-KVM VNC Auth Flaw

red hat
Calendar Grey March 10, 2011
Dist Redhat Esm H88
Canonical enhances libvirt packages addressing significant vulnerabilities related to VNC security protocols on Ubuntu platforms.
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/kb/docs/DOC-11259

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. Virtual Network Computing (VNC) is a remote display system.
A flaw was found in the way the VNC "password" option was handled. Clearing a password disabled VNC authentication, allowing a remote user able to connect to the virtual machines' VNC ports to open a VNC session without authentication. (CVE-2011-0011)
All users of qemu-kvm should upgrade to these updated packages, which contain a backported patch to resolve 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 remote access red hat enterprise authentication flaw qemu-kvm

References

https://access.redhat.com/security/cve/CVE-2011-0011 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
x86_64: qemu-img-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.113.el6_0.8.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64: qemu-img-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.113.el6_0.8.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
x86_64: qemu-img-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.113.el6_0.8.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
x86_64: qemu-img-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.113.el6_0.8.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.113.el6_0.8.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


Advisory ID: RHSA-2011:0345-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0345.html
Issue date: 2011-03-10

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 having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory remote access red hat enterprise authentication flaw qemu-kvm

Relevant Releases Architectures

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

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

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

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

Bugs Fixed

668589 - CVE-2011-0011 qemu-kvm: Setting VNC password to empty string silently disables all authentication

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