VMware Hosted products and ESX and ESXi patches resolve security issues

a. VMware Descheduled Time Accounting driver vulnerability may cause a denial of service in Windows based virtual machines.The VMware Descheduled Time Accounting Service is an optional,experimental service that provides improved guest operating systemaccounting.This patch fixes a denial of service vulnerability that could betriggered in a virtual machine by an unprivileged, locallylogged-on user in the virtual machine.Virtual machines are affected under the following conditions:- The virtual machine is running a Windows operating system.- The VMware Descheduled Time Accounting driver is installedin the virtual machine. Note that this is an optional (non-default) part of the VMware Tools installation.- The VMware Descheduled Time Accounting Service is not runningin the virtual machineThe VMware Descheduled Time Accounting Service is no longer providedin newer versions of VMware Tools, starting with the versionsreleased in Fusion 2.0.2 and ESX 4.0.However, virtual machines migrated from vulnerable releases willstill be vulnerable if the three conditions listed above are met,until their tools are upgraded.Steps needed to remediate this vulnerability:Guest systems on VMware Workstation, Player, ACE, Server, Fusion- Install the new version of Workstation, Player, ACE, Server,Fusion (see below for version information)- Upgrade tools in the virtual machine (virtual machine userswill be prompted to upgrade).Guest systems on ESX 3.5, ESXi 3.5, ESX 3.0.2, ESX 3.0.3- Install the relevant patches (see below for patch identifiers)- Manually upgrade tools in the virtual machine (virtual machineusers will not be prompted to upgrade). Note the VI Client willnot show the VMware tools is out of date in the summary tab.Please see http://tinyurl.com/27mpjo page 80 for details.Guests systems on ESX 4.0 and ESXi 4.0 that have been migrated fromESX 3.5, ESXi 3.5, and ESX 3.0.x- Install/upgrade the new tools in the virtual machine (virtualmachine users will be prompted to upgrade).If the Descheduled Time Accounting driver was installed, the toolsupgrade will result in an updated driver for Workstation, Player,ACE, Server, ESX 3.0.2, ESX 3.0.3, ESX 3.5, ESXi 3.5. For Fusion,ESX 4.0, and ESXi 4.0 the tools upgrade will result in the removalof the driver.VMware would like to thank Nikita Tarakanov for reporting thisissue to us.The Common Vulnerabilities and Exposures project (cve.mitre.org)has assigned the name CVE-2009-1805 to this issue.The following table lists what action remediates the vulnerability(column 4) if a solution is available. See above for remediationdetails.