Cisco has released free software updates that address the vulnerability described in this advisory.

Customers may only install and expect support for software versions and feature sets for which they have purchased a license.

By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.htmlAdditionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner.
In most cases this will be a maintenance upgrade to software that was previously purchased.

Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution.In all cases, customers should ensure that the devices to upgrade contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release.
If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.Customers Without Service ContractsCustomers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco Technical Assistance Center (TAC):http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.htmlCustomers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.Fixed ReleasesCustomers are advised to install an appropriate fixed release as indicated in this section.This vulnerability has been fixed in the following releases:
Version 11.5(1) SU1 for service version 11.5(1)
Cisco Optional Package ciscocm.cup-psirt-sipd-1151-v1.1.cop.sgn for service versions 11.5(1)
Cisco Optional Package ciscocm.cup-psirt-sipd-1101-v1.1.cop.sgn for service versions 11.0(1)
Cisco Optional Package ciscocm.cup-psirt-sipd-1052-v1.1.cop.sgn for service versions 10.5(2)
Cisco Optional Package ciscocm.cup-psirt-sipd-911SU-v1.1.cop.sgn for service versions 9.1(1)

Customers can download software for the Cisco Unified Communications Manager IM and Presence Service from the Software Center on Cisco.com by navigating to Products > Unified Communications > Unified Communications Applications > Presence Software > Unified Communications Manager IM & Presence Service.

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