[Qemu-devel] [Bug 697197] Re: Empty password allows access to VNC in libvirt

[Launchpad Bug Tracker]

** Branch linked: lp:ubuntu/maverick-updates/qemu-kvm

** Branch linked: lp:ubuntu/lucid-updates/qemu-kvm

** Branch linked: lp:ubuntu/karmic-security/qemu-kvm

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https://bugs.launchpad.net/bugs/697197

Title:
  Empty password allows access to VNC in libvirt

Status in libvirt virtualization API:
  Unknown
Status in QEMU:
  Confirmed
Status in qemu-kvm:
  Unknown
Status in “libvirt” package in Ubuntu:
  Invalid
Status in “qemu-kvm” package in Ubuntu:
  Fix Released
Status in “libvirt” source package in Lucid:
  Invalid
Status in “qemu-kvm” source package in Lucid:
  Fix Released
Status in “libvirt” source package in Maverick:
  Invalid
Status in “qemu-kvm” source package in Maverick:
  Fix Released
Status in “libvirt” source package in Natty:
  Invalid
Status in “qemu-kvm” source package in Natty:
  Fix Released
Status in “libvirt” source package in Karmic:
  Invalid
Status in “qemu-kvm” source package in Karmic:
  Fix Released

Bug description:
  The help in the /etc/libvirt/qemu.conf states

  "To allow access without passwords, leave this commented out. An empty
  string will still enable passwords, but be rejected by QEMU
  effectively preventing any use of VNC."

  yet setting:

  vnc_password=""

  allows access to the vnc console without any password prompt just as
  if it is hashed out completely.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: libvirt-bin 0.8.3-1ubuntu14
  ProcVersionSignature: Ubuntu 2.6.35-24.42-server 2.6.35.8
  Uname: Linux 2.6.35-24-server x86_64
  Architecture: amd64
  Date: Tue Jan  4 12:18:35 2011
  InstallationMedia: Ubuntu-Server 10.04.1 LTS "Lucid Lynx" - Release amd64 
(20100816.2)
  ProcEnviron:
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: libvirt