CentOS 5 : xen (CESA-2009:1472)

high Nessus Plugin ID 43799

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Synopsis

The remote CentOS host is missing one or more security updates.

Description

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.

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

Update the affected xen packages.

See Also

http://www.nessus.org/u?fa4a4a18

http://www.nessus.org/u?2ebcf63d

Plugin Details

Severity: High

ID: 43799

File Name: centos_RHSA-2009-1472.nasl

Version: 1.14

Type: local

Agent: unix

Published: 1/6/2010

Updated: 1/4/2021

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:xen, p-cpe:/a:centos:centos:xen-devel, p-cpe:/a:centos:centos:xen-libs, cpe:/o:centos:centos:5

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/30/2009

Vulnerability Publication Date: 10/5/2009

Reference Information

CVE: CVE-2009-3525

BID: 36523

CWE: 264

RHSA: 2009:1472