Scientific Linux Security Update : xen on SL5.x i386/x86_64

This script is Copyright (C) 2012 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

The xen packages contain administration tools and the xend service for
managing the kernel-xen kernel for virtualization on Scientific Linux.

A heap overflow flaw was found in the way QEMU emulated the e1000
network interface card. A privileged guest user in a virtual machine
whose network interface is configured to use the e1000 emulated driver
could use this flaw to crash QEMU or, possibly, escalate their
privileges on the host. (CVE-2012-0029)

This update also fixes the following bugs :

- Adding support for jumbo frames introduced incorrect
network device expansion when a bridge is created. The
expansion worked correctly with the default
configuration, but could have caused network setup
failures when a user-defined network script was used.
This update changes the expansion so network setup will
not fail, even when a user-defined network script is
used.

- A bug was found in xenconsoled, the Xen hypervisor
console daemon. If timestamp logging for this daemon was
enabled (using both the
XENCONSOLED_TIMESTAMP_HYPERVISOR_LOG and
XENCONSOLED_TIMESTAMP_GUEST_LOG options in
'/etc/sysconfig/xend'), xenconsoled could crash if the
guest emitted a lot of information to its serial console
in a short period of time. Eventually, the guest would
freeze after the console buffer was filled due to the
crashed xenconsoled. Timestamp logging is disabled by
default.

All xen users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to take effect.

See also :

http://www.nessus.org/u?f40c7a2a

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.4
(CVSS2#AV:A/AC:M/Au:S/C:C/I:C/A:C)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 61280 ()

Bugtraq ID:

CVE ID: CVE-2012-0029