Oval Definition:oval:com.redhat.rhsa:def:20080892
Revision Date:2008-10-01Version:643
Title:RHSA-2008:0892: xen security and bug fix update (Important)
Description:The xen packages contain tools for managing the virtual machine monitor in Red Hat Virtualization.

  • It was discovered that the hypervisor's para-virtualized framebuffer (PVFB) backend failed to validate the frontend's framebuffer description properly. This could allow a privileged user in the unprivileged domain (DomU) to cause a denial of service, or, possibly, elevate privileges to the privileged domain (Dom0). (CVE-2008-1952)

  • A flaw was found in the QEMU block format auto-detection, when running fully-virtualized guests and using Qemu images written on removable media (USB storage, 3.5" disks). Privileged users of such fully-virtualized guests (DomU), with a raw-formatted disk image, were able to write a header to that disk image describing another format. This could allow such guests to read arbitrary files in their hypervisor's host (Dom0). (CVE-2008-1945)

    Additionally, the following bug is addressed in this update:

    The qcow-create command terminated when invoked due to glibc bounds checking on the realpath() function.

    Users of xen are advised to upgrade to these updated packages, which resolve these security issues and fix this bug.
  • Family:unixClass:patch
    Status:Reference(s):CVE-2008-1945
    CVE-2008-1952
    RHSA-2008:0892
    RHSA-2008:0892-01
    RHSA-2008:0892-01
    Platform(s):Red Hat Enterprise Linux 5
    Product(s):
    Definition Synopsis
  • Red Hat Enterprise Linux must be installed
  • OR Package Information
  • Red Hat Enterprise Linux 5 is installed
  • AND
  • xen is earlier than 0:3.0.3-64.el5_2.3
  • AND xen is signed with Red Hat redhatrelease2 key
  • xen-devel is earlier than 0:3.0.3-64.el5_2.3
  • AND xen-devel is signed with Red Hat redhatrelease2 key
  • xen-libs is earlier than 0:3.0.3-64.el5_2.3
  • AND xen-libs is signed with Red Hat redhatrelease2 key
  • BACK