Synopsis

Moderate: xen security and bug fix update

Type/Severity

Security Advisory: Moderate

Topic

Updated xen packages that fix a security issue and multiple bugs are now
available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

Description

Xen is an open source virtualization framework. Virtualization allows users
to run guest operating systems in virtual machines on top of a host
operating system.

The pyGrub boot loader did not honor the "password" option in the grub.conf
file for para-virtualized guests. Users with access to a guest's console
could use this flaw to bypass intended access restrictions and boot the
guest with arbitrary kernel boot options, allowing them to get root
privileges in the guest's operating system. With this update, pyGrub
correctly honors the "password" option in grub.conf for para-virtualized
guests. (CVE-2009-3525)

This update also fixes the following bugs:

• rebooting para-virtualized guests sometimes caused those guests to crash
  due to a race condition in the xend node control daemon. This update fixes
  this race condition so that rebooting guests no longer potentially causes
  them to crash and fail to reboot. (BZ#525141)
  
• due to a race condition in the xend daemon, a guest could disappear from
  the list of running guests following a reboot, even though the guest
  rebooted successfully and was running. This update fixes this race
  condition so that guests always reappear in the guest list following a
  reboot. (BZ#525143)
  
• attempting to use PCI pass-through to para-virtualized guests on certain
  kernels failed with a "Function not implemented" error message. As a
  result, users requiring PCI pass-through on para-virtualized guests were
  not able to update the xen packages without also updating the kernel and
  thus requiring a reboot. These updated packages enable PCI pass-through for
  para-virtualized guests so that users do not need to upgrade the kernel in
  order to take advantage of PCI pass-through functionality. (BZ#525149)
  

All Xen users should upgrade to these updated packages, which contain
backported patches to correct these issues. After installing the updated
packages, the xend service must be restarted for this update to take
effect.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Server - Extended Update Support 5.4 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support 5.4 ia64
• Red Hat Enterprise Linux Server - Extended Update Support 5.4 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 525141 - [REG][Xen][5.4] PV domains may crash after reboot
• BZ - 525142 - Add grub.conf password protection support to pygrub
• BZ - 525143 - Domain goes missing from xm list when rebooted
• BZ - 525149 - PCI-Paththrough with PCI-Card does not work anymore with RHEL5.4
• BZ - 525740 - CVE-2009-3525 Xen: PyGrub missing support for password configuration command

CVEs

• CVE-2009-3525

References

• http://www.redhat.com/security/updates/classification/#moderate

Red Hat Enterprise Linux Server 5

SRPM
xen-3.0.3-94.el5_4.1.src.rpm	SHA-256: 0caaf8a7c84ebf83b552bda5c325a4a248c7c3bfe081d9a0960bc4cff6df6082
x86_64
xen-3.0.3-94.el5_4.1.x86_64.rpm	SHA-256: ffaab63279bf89611f8b2f37ae87f93c8265254ec700fba0128d590356da6629
xen-devel-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 49a0c4f9ba423ea0603a40c144b3309f0e7ed5b17274adb708eb10f95b2c7b54
xen-devel-3.0.3-94.el5_4.1.x86_64.rpm	SHA-256: 3bb96df5e085f0501626cd70ce8b50fdbae6d7b891b7a28f7ea9b86902cad947
xen-libs-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 68053a1491157e66132e9b702abfe3f14fc592130db4a5f53f9dfe0624debab4
xen-libs-3.0.3-94.el5_4.1.x86_64.rpm	SHA-256: a818b8b64b5f4dd4e09462cfa699d9a6f414c22d9e8f3c648f6367c2cc62ade7
ia64
xen-3.0.3-94.el5_4.1.ia64.rpm	SHA-256: 44099b2ecacbfcdc6a490efada883757651807bfd31bbdd904d8a9e36f93b391
xen-devel-3.0.3-94.el5_4.1.ia64.rpm	SHA-256: d3517c8937a612ffc36ced239361d731b5f222bd774b4276deac1624600ef735
xen-libs-3.0.3-94.el5_4.1.ia64.rpm	SHA-256: 6f8a8c18df4e1ae788f313a86be11a571e985ad31970d92c7afe2bd6d99de75f
i386
xen-3.0.3-94.el5_4.1.i386.rpm	SHA-256: ff06d4e7cf22baa6341fa34a48e21c1cc909dffe2355f3ac95b9445a7f32910d
xen-devel-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 49a0c4f9ba423ea0603a40c144b3309f0e7ed5b17274adb708eb10f95b2c7b54
xen-libs-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 68053a1491157e66132e9b702abfe3f14fc592130db4a5f53f9dfe0624debab4

Red Hat Enterprise Linux Workstation 5

SRPM
xen-3.0.3-94.el5_4.1.src.rpm	SHA-256: 0caaf8a7c84ebf83b552bda5c325a4a248c7c3bfe081d9a0960bc4cff6df6082
x86_64
xen-3.0.3-94.el5_4.1.x86_64.rpm	SHA-256: ffaab63279bf89611f8b2f37ae87f93c8265254ec700fba0128d590356da6629
xen-devel-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 49a0c4f9ba423ea0603a40c144b3309f0e7ed5b17274adb708eb10f95b2c7b54
xen-devel-3.0.3-94.el5_4.1.x86_64.rpm	SHA-256: 3bb96df5e085f0501626cd70ce8b50fdbae6d7b891b7a28f7ea9b86902cad947
xen-libs-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 68053a1491157e66132e9b702abfe3f14fc592130db4a5f53f9dfe0624debab4
xen-libs-3.0.3-94.el5_4.1.x86_64.rpm	SHA-256: a818b8b64b5f4dd4e09462cfa699d9a6f414c22d9e8f3c648f6367c2cc62ade7
i386
xen-3.0.3-94.el5_4.1.i386.rpm	SHA-256: ff06d4e7cf22baa6341fa34a48e21c1cc909dffe2355f3ac95b9445a7f32910d
xen-devel-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 49a0c4f9ba423ea0603a40c144b3309f0e7ed5b17274adb708eb10f95b2c7b54
xen-libs-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 68053a1491157e66132e9b702abfe3f14fc592130db4a5f53f9dfe0624debab4

Red Hat Enterprise Linux Desktop 5

SRPM
xen-3.0.3-94.el5_4.1.src.rpm	SHA-256: 0caaf8a7c84ebf83b552bda5c325a4a248c7c3bfe081d9a0960bc4cff6df6082
x86_64
xen-libs-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 68053a1491157e66132e9b702abfe3f14fc592130db4a5f53f9dfe0624debab4
xen-libs-3.0.3-94.el5_4.1.x86_64.rpm	SHA-256: a818b8b64b5f4dd4e09462cfa699d9a6f414c22d9e8f3c648f6367c2cc62ade7
i386
xen-libs-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 68053a1491157e66132e9b702abfe3f14fc592130db4a5f53f9dfe0624debab4

Red Hat Enterprise Linux Server from RHUI 5

SRPM
xen-3.0.3-94.el5_4.1.src.rpm	SHA-256: 0caaf8a7c84ebf83b552bda5c325a4a248c7c3bfe081d9a0960bc4cff6df6082
x86_64
xen-libs-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 68053a1491157e66132e9b702abfe3f14fc592130db4a5f53f9dfe0624debab4
xen-libs-3.0.3-94.el5_4.1.x86_64.rpm	SHA-256: a818b8b64b5f4dd4e09462cfa699d9a6f414c22d9e8f3c648f6367c2cc62ade7
i386
xen-libs-3.0.3-94.el5_4.1.i386.rpm	SHA-256: 68053a1491157e66132e9b702abfe3f14fc592130db4a5f53f9dfe0624debab4