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Multiple Vulnerabilities in Cisco Unified Communications Manager

Advisory ID: cisco-sa-20130821-cucm

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130821-cucm

Revision 1.0

For Public Release 2013 August 21 16:00  UTC (GMT)


Summary

Cisco Unified Communications Manager (Unified CM) contains multiple vulnerabilities that could allow an unauthenticated, remote attacker to modify data, execute arbitrary commands, or cause a denial of service (DoS) condition.

Cisco has released free software updates that address these vulnerabilities. This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130821-cucm

Affected Products

Vulnerable Products

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

  • Cisco Unified Communications Manager 7.1(x)
  • Cisco Unified Communications Manager 8.5(x)
  • Cisco Unified Communications Manager 8.6(x)
  • Cisco Unified Communications Manager 9.0(x)
  • Cisco Unified Communications Manager 9.1(x)

Note: Cisco Unified Communications Manager version 8.0 reached the End of Software Maintenance on October 23, 2012. Customers using Cisco Unified Communications Manager 8.0(x) versions should contact their Cisco support team for assistance in upgrading to a supported version of Cisco Unified Communications Manager.

Products Confirmed Not Vulnerable

No other Cisco products are currently known to be affected by these vulnerabilities.

Details

Cisco Unified Communications Manager is the call processing component of the Cisco IP Telephony solution that extends enterprise telephony features and functions to packet telephony network devices, such as IP phones, media processing devices, VoIP gateways, and multimedia applications. Cisco Unified Communications Manager contains multiple vulnerabilities that could allow an unauthenticated, remote attacker to cause a DoS condition or execute code remotely.

Denial of Service Vulnerabilities

Cisco Unified Communications Manager 7.1(x) contains a vulnerability that could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. The vulnerability is due to improper error handling . An attacker could exploit this vulnerability by sending malformed registration messages, resulting in a DoS condition on an affected device. This vulnerability is documented in Cisco bug ID CSCuf93466 (registered customers only) and has been assigned the Common Vulnerabilities and Exposures (CVE) ID CVE-2013-3459.  This vulnerability affects only Cisco UCM versions 7.1(x).

Cisco Unified Communications Manager 8.5(x), 8.6(x), and 9.0(x) contain a vulnerability that could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. The vulnerability is due to insufficient limiting of traffic on certain UDP ports. An attacker could exploit this vulnerability by sending UDP packets at a high rate to certain ports on an affected device, resulting in a DoS condition on the affected device. This vulnerability is documented in Cisco bug ID CSCub85597 (registered customers only) and has been assigned the CVE ID CVE-2013-3460.

Cisco Unified Communications Manager versions 8.5(x), 8.6(x) and 9.0(1) contain a vulnerability that could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. The vulnerability is due to insufficient rate limiting of traffic on the Session Initiation Protocol (SIP) port. An attacker could exploit this vulnerability by sending UDP packets at a high rate to port 5060 on an affected device. A sustained attack could allow the attacker to cause a DoS condition on the affected device. This vulnerability is documented in Cisco bug ID CSCub35869 (registered customers only) and has been assigned the Common Vulnerabilities and Exposures CVE ID CVE-2013-3461.

Buffer Overflow Vulnerability

Cisco Unified Communications Manager 7.1(x), 8.5(x), 8.6(x), 9.0(x) and 9.1(x) contain a vulnerability that could allow an authenticated, remote attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient bounds checking. An attacker could exploit this vulnerability by overwriting an allocated memory buffer on an affected device. An exploit could allow the attacker to corrupt data, disrupt services, or run arbitrary commands. This vulnerability is documented in Cisco bug ID CSCud54358 (registered customers only) and has been assigned the CVE ID CVE-2013-3462.  This vulnerability affects Cisco UCM versions 7.1(x) through 9.1(1x).

Vulnerability Scoring Details

Cisco has scored the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this security advisory is in accordance with CVSS version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability severity and helps organizations determine the urgency and priority of a response.

Cisco has provided a base and temporal score. Customers can also compute environmental scores that help determine the impact of the vulnerability in their own networks.

Cisco has provided additional information regarding CVSS at the following link:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to compute the environmental impact for individual networks at the following link:

http://intellishield.cisco.com/security/alertmanager/cvss



CSCub85597: Memory Leak Observed During UDP Flood

Calculate the environmental score of CSCub85597

CVSS Base Score - 7.8

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

None

None

Complete

CVSS Temporal Score - 6.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCub35869: High CPU Utilization and Memory Leak During UDP Flood

Calculate the environmental score of CSCub35869

CVSS Base Score - 7.1

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Medium

None

None

None

Complete

CVSS Temporal Score - 5.9

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCud54358: Insufficient Boundary Check of Input Buffer

Calculate the environmental score of CSCud54358

CVSS Base Score - 8.5

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Medium

Single

Complete

Complete

Complete

CVSS Temporal Score - 7.0

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCuf93466:  Improper Error Handling of Malformed Registration Messages

Calculate the environmental score of CSCuf93466

CVSS Base Score - 7.8

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

None

None

Complete

CVSS Temporal Score - 6.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed


Impact

Successful exploitation of these vulnerabilities may result in disruption of services, modification of system data, or execution of arbitrary files. Continued exploitation may result in a DoS condition.

Software Versions and Fixes

When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution. Cisco recommends upgrading to a release equal to or later than the release in the "Recommended Release" column of the following table:

Identifier
CVE ID
Cisco Unified Communication Manager Version First Fixed
Recommended Release
 CSCud54358: Insufficient Boundary Check of Input Buffer  CVE-2013-3462  7.x 7.1(5b)su6  7.1(5b)su6a
 CSCuf93466:  Improper Error Handling of Malformed Registration Messages  CVE-2013-3459  7.x 7.1(5b)su6a  7.1(5b)su6a
 CSCub85597: Memory Leak Observed During UDP Flood  CVE-2013-3460 8.x 8.5(1)su6,
8.6(2a)su3,
8.6(5)BE3K
8.5(1)su6,
8.6(2a)su3,
8.6(5)BE3K
 CSCub35869: High CPU Utilization and Memory Leak During UDP Flood  CVE-2013-3461 8.x 8.6(2a)su3,
8.6(5)BE3K
8.6(2a)su3,
8.6(5)BE3K
 CSCud54358: Insufficient Boundary Check of Input Buffer  CVE-2013-3462 8.x 8.5(1)su6,
8.6(2a)su3
8.5(1)su6,
8.6(2a)su3
 CSCub85597: Memory Leak Observed During UDP Flood  CVE-2013-3460 9.x 9.1(1) 9.1(2) or later
 CSCub35869: High CPU Utilization and Memory Leak During UDP Flood  CVE-2013-3461 9.x 9.1(1) 9.1(2) or later
 CSCud54358: Insufficient Boundary Check of Input Buffer  CVE-2013-3462 9.x 9.1(2) 9.1(2) or later

*Note: Cisco Unified Communications Manager Version 8.5(1)su6 is targeted for release in mid-September 2013. Customers running Cisco Unified Communications Manager Version 8.5 are encouraged to upgrade to 8.6 for complete coverage for all vulnerabilities listed in this advisory.

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.

Workarounds

No workarounds are available for these vulnerabilities.

Obtaining Fixed Software

Cisco has released free software updates that address the vulnerabilities described in this advisory. Prior to deploying software, customers are advised to consult their maintenance providers or check the software for feature set compatibility and known issues that are specific to their environments.

Customers may only install and expect support for feature sets they have purchased. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html.

Customers with Service Contracts

Customers with contracts should obtain upgraded software through their regular update channels. For most customers, upgrades should be obtained through the Software Navigator on Cisco.com at http://www.cisco.com/cisco/software/navigator.html.

Customers using Third Party Support Organizations

Customers with Cisco products that are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers, should contact that organization for assistance with the appropriate course of action.

The effectiveness of any workaround or fix depends on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Because of the variety of affected products and releases, customers should consult their service providers or support organizations to ensure that any applied workaround or fix is the most appropriate in the intended network before it is deployed.

Customers without Service Contracts

Customers 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):

  • +1 800 553 2447 (toll free from within North America)
  • +1 408 526 7209 (toll call from anywhere in the world)
  • e-mail: tac@cisco.com

Customers 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. Customers without service contracts should request free upgrades through the TAC.

Refer to Cisco Worldwide Contacts at http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information, including localized telephone numbers, instructions, and e-mail addresses for support in various languages.

Exploitation and Public Announcements

The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

These vulnerabilities were found during internal testing.

Status of this Notice: Final

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.


Distribution

This advisory is posted on Cisco Security Intelligence Operations at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130821-cucm

Additionally, a text version of this advisory is clear signed with the Cisco PSIRT PGP key and circulated among the following e-mail addresses:

  • cust-security-announce@cisco.com
  • first-bulletins@lists.first.org
  • bugtraq@securityfocus.com
  • vulnwatch@vulnwatch.org
  • cisco@spot.colorado.edu
  • cisco-nsp@puck.nether.net
  • full-disclosure@lists.grok.org.uk

Future updates of this advisory, if any, will reside on Cisco.com but may not be announced on mailing lists. Users can monitor this advisory's URL for any updates.


Revision History

Revision 1.0 2013-August-21 Initial public release

Cisco Security Procedures

Complete information about reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco is available on Cisco.com at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html. This web page includes instructions for press inquiries regarding Cisco Security Advisories. All Cisco Security Advisories are available at http://www.cisco.com/go/psirt.