[SECURITY] Fedora 18 Update: xen-4.2.0-4.fc18

[updates at fedoraproject.org]

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Fedora Update Notification
FEDORA-2012-18146
2012-11-14 01:24:14
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Name        : xen
Product     : Fedora 18
Version     : 4.2.0
Release     : 4.fc18
URL         : http://xen.org/
Summary     : Xen is a virtual machine monitor
Description :
This package contains the XenD daemon and xm command line
tools, needed to manage virtual machines running under the
Xen hypervisor

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Update Information:

A guest can block a cpu by setting a bad VCPU deadline [XSA 20,
CVE-2012-4535] (#876198)
HVM guest can exhaust p2m table crashing xen [XSA 22, CVE-2012-4537]
(#876203)
PAE HVM guest can crash hypervisor [XSA-23, CVE-2012-4538] (#876205)
32-bit PV guest on 64-bit hypervisor can cause an hypervisor infinite
loop [XSA-24, CVE-2012-4539] (#876207)
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References:

  [ 1 ] Bug #870086 - CVE-2012-4535 kernel: xen: VCPU timer overflow leads to PCPU deadlock and host death-by-watchdog
        https://bugzilla.redhat.com/show_bug.cgi?id=870086
  [ 2 ] Bug #870101 - CVE-2012-4537 kernel: xen: Memory mapping failure can crash Xen
        https://bugzilla.redhat.com/show_bug.cgi?id=870101
  [ 3 ] Bug #870106 - CVE-2012-4538 kernel: xen: Unhooking empty PAE entries can crash Xen
        https://bugzilla.redhat.com/show_bug.cgi?id=870106
  [ 4 ] Bug #870110 - CVE-2012-4539 kernel: xen: Grant Table hypercall infinite loop can crash Xen
        https://bugzilla.redhat.com/show_bug.cgi?id=870110
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This update can be installed with the "yum" update program.  Use 
su -c 'yum update xen' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

All packages are signed with the Fedora Project GPG key.  More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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