Cisco Prime Central for Hosted Collaboration Solution Assurance Excessive CPU Utilization Vulnerability

Summary

• Cisco Prime Central for Hosted Collaboration Solution (HCS) Assurance contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. Exploitation of this vulnerability could interrupt the monitoring of voice services.
  
  Cisco has released software updates that address this vulnerability. This advisory is available at the following link:
  http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130227-hcs

Affected Products

• Vulnerable Products

  The following products are affected by the vulnerability that is described in this advisory:
  

  • Cisco Prime Central for HCS Assurance 8.6
  • Cisco Prime Central for HCS Assurance 9.0

  Products Confirmed Not Vulnerable

  No other Cisco products are currently known to be affected by this vulnerability.

Details

• Cisco Prime Central for HCS Assurance is a service that allows Cisco partners to provide a wide range of Cisco collaboration applications to their customers as a subscriber-based solution.
  
  Malformed TLS Messages Denial of Service:
  
  Cisco Prime Central for HCS Assurance versions 8.6 and 9.0 contain a vulnerability that could allow an unauthenticated, remote attacker to cause a DoS condition by consuming excessive CPU.
  
  The vulnerability is triggered by malformed TLS messages received by the system. An attacker could exploit this vulnerability by sending malformed TLS messages to TCP port 9043 or TCP port 9443. Successful exploit of the vulnerability could allow the attacker to consume all available CPU cycles and interrupt the monitoring of voice services. This vulnerability is documented in Cisco bug ID CSCuc07155 (registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2013-1135.

Workarounds

• No workarounds are available for this vulnerability.
  
  Additional mitigations that can be deployed on Cisco devices within the network are available in the Cisco Applied Intelligence companion document for this Advisory:
  
  http://tools.cisco.com/security/center/viewAMBAlert.x?alertId=28034

Fixed Software

• 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.
  
  
  

  Cisco Prime Central for HCS Assurance Version	Recommended Release
  8.x	9.1(1)
  9.0	9.1(1)

  
  
  In all cases, customers should ensure that the devices to be upgraded 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.

Exploitation and Public Announcements

• The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
  
  This vulnerability was found by Cisco during internal testing.

URL

• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130227-hcs

Revision History

• Revision 1.0

  2013-February-27

  Initial public release.

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