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Multiple Vulnerabilities in Cisco Unified Communications Manager

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Advisory ID: cisco-sa-20110427-cucm

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110427-cucm

Revision 1.0

For Public Release 2011 April 27 16:00  UTC (GMT)

Summary

Cisco Unified Communications Manager (previously known as Cisco CallManager) contains the following vulnerabilities:

  • Three (3) denial of service (DoS) vulnerabilities that affect Session Initiation Protocol (SIP) services
  • Directory transversal vulnerability
  • Two (2) SQL injection vulnerabilities

Cisco has released free software updates for affected Cisco Unified Communications Manager versions to address the vulnerabilities. A workaround exists only for the SIP DoS vulnerabilities.

This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110427-cucm.

Affected Products

Vulnerable Products

The following products are affected by at least one of the vulnerabilities that are described in this advisory:

  • Cisco Unified Communications Manager 6.x
  • Cisco Unified Communications Manager 7.x
  • Cisco Unified Communications Manager 8.x

Note: Cisco Unified Communications Manager version 5.1 reached end of software maintenance on February 13, 2010. Customers who are using Cisco Unified Communications Manager 5.x versions should contact your Cisco support team for assistance in upgrading to a supported version of Cisco Unified Communications Manager.

Products Confirmed Not Vulnerable

Cisco Unified Communications Manager version 4.x is not affected by these vulnerabilities. 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.

DoS Vulnerabilities in SIP

Cisco Unified Communications Manager contains three DoS vulnerabilities that involve the processing of SIP messages. Each vulnerability is triggered by a malformed SIP message that could cause a critical process to fail, resulting in the disruption of voice services. All SIP ports (TCP ports 5060 and 5061 and UDP ports 5060 and 5061) are affected.

The first SIP DoS vulnerability is documented in Cisco Bug ID CSCti42904 ( registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) identifier CVE-2011-1604. This vulnerability is fixed in Cisco Unified Communications Manager versions 8.5(1), 8.0(3a)su2, 7.1(5b)su3, and 6.1(5)su3.

The second SIP DoS vulnerability is documented in Cisco Bug ID CSCth39586 ( registered customers only) and has been assigned CVE identifier CVE-2011-1605. This vulnerability is fixed in Cisco Unified Communications Manager versions 8.5(1), 8.0(3), 7.1(5b)su2, and 6.1(5)su2.

The third SIP DoS vulnerability is documented in Cisco Bug ID CSCtg62855 ( registered customers only) and has been assigned CVE identifier CVE-2011-1606. This vulnerability is fixed in Cisco Unified Communications Manager versions 8.5(1), 8.0(3), 7.1(5)su1, and 6.1(5)su2.

Directory Transversal Vulnerability

Cisco Unified Communications Manager contains a vulnerability that involves the processing of POST requests. An authenticated, remote attacker with the ability to intercept a packet to the affected device could specify a different location or filename, which may result in the upload of a malicious file. This vulnerability is documented in Cisco Bug ID CSCti81603 ( registered customers only) and has been assigned CVE identifier CVE-2011-1607. The second vulnerability is fixed in Cisco Unified Communications Manager versions 8.5(1), 8.0(3a)su1, 7.1(5b)su3, and 6.1(5)su3.

SQL Injection Vulnerabilities

Cisco Unified Communications Manager is affected by the following SQL injection vulnerabilities:

 

  • The first vulnerability could allow an authenticated, remote attacker to modify the system configuration; create, modify and delete users; or modify the configuration of Cisco Unified Communications Manager. This vulnerability is documented in Cisco Bug ID CSCtg85647 ( registered customers only) and has been assigned CVE identifier CVE-2011-1609. This vulnerability is fixed in Cisco Unified Communications Manager versions 8.5(1), 8.0(3), 7.1(5)su1, and 6.1(5)su2.
  • The second vulnerability could allow an unauthenticated, remote attacker to modify system configuration; create, modify, and delete users; or modify the configuration of Cisco Unified Communications Manager. This vulnerability is documented in Cisco Bug ID CSCtj42064 ( registered customers only) and has been assigned CVE identifier CVE-2011-1610. This vulnerability is fixed in Cisco Unified Communications Manager versions 8.5(1)su1, 8.0(3a)su2, 7.1(5)su4, and 6.1(5)su3.

Vulnerability Scoring Details

Cisco has provided scores for the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0.

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

Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions regarding CVSS at
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html .

Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at
http://intellishield.cisco.com/security/alertmanager/cvss .

CSCth39586 - Core dump when processing certain SIP packets

Calculate the environmental score of CSCth39586

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

 

CSCtg62855 - Core dump when processing certain SIP packets

Calculate the environmental score of CSCtg62855

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

 

CSCti42904 - Memory leak may be experienced when processing certain SIP packets ( registered customers only)

Calculate the environmental score of CSCti42904

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

 

CSCti81603 - Cisco Unified Reporting fails to prohibit uploading of files ( registered customers only)

Calculate the environmental score of CSCti81603

CVSS Base Score - 6.5

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

Single

Partial

Partial

Partial

CVSS Temporal Score - 5.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

 

CSCtg85647 - Database Security Issue ( registered customers only)

Calculate the environmental score of CSCtg85647

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

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

 

CSCtj42064 - Potential SQL Injection ( registered customers only)

Calculate the environmental score of CSCtj42064

CVSS Base Score - 6.4

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

Partial

Partial

None

CVSS Temporal Score - 5.3

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

Impact

Successful exploitation of the vulnerabilities that are described in this advisory could result in the interruption of voice services, privilege escalation and possible data modification. In the case of DoS attacks, the affect Cisco Unified Communications Manager processes will restart, but repeated attacks may result in a sustained DoS condition.

Software Versions and Fixes

When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.

In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.

 

When considering software upgrades, also consult http://www.cisco.com/go/psirt and any 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 Releases" column of the table.

Cisco Unified Communications Manager Version

Recommended Releases

6.x

6.1(5)SU3

7.x

7.1(5b)SU4

8.0

8.0(3a)SU2

8.5

8.5(1)SU1

 

Note: The 7.1(5b)SU4 release of Cisco Unified Communications Manager is expected to be available by the end of April 2011.

 

Workarounds

A workaround exists only for the SIP DoS vulnerabilities. Cisco Unified Communications Manager versions 6.1(4), 7.1(2), and 8.0(1) introduced the ability to disable SIP processing. SIP processing is enabled by default. Customers who do not use SIP processing can use the following instructions to disable SIP processing:

  • Step 1: Log into the Cisco Unified Communications Manager Administration web interface.
  • Step 2: Navigate to System > Service Parameters and select the appropriate Cisco Unified Communications Manager server and the Cisco CallManager Service.
  • Step 3: Change the "SIP Interoperability Enabled" parameter to False, and click Save.
    Note: For a SIP processing change to take effect, the Cisco CallManager Service must be restarted. For information on how to restart the service, refer to the "Restarting the Cisco CallManager Service" section of the document at the following location: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/7_1_2/ccmcfg/b03dpi.html#wp1075124
    It is possible to mitigate these vulnerabilities by implementing filtering on screening devices and permitting access to TCP ports 5060 and 5061 and UDP ports 5060 and 5061 only from networks that require SIP access to Cisco Unified Communications Manager servers.

    Additional mitigations that can be deployed on Cisco devices in the network are available in the companion document "Cisco Applied Mitigation Bulletin: Identifying and Mitigating Exploitation of the Multiple Vulnerabilities in Cisco Unified Communications Manager" which is available at the following location:
    http://tools.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20110427-cucm

Obtaining Fixed Software

Cisco has released free software updates that address these vulnerabilities. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment.

Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html , or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml .

Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades

Customers with Service Contracts

Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com.

Customers using Third Party Support Organizations

Customers whose Cisco products 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 support organization for guidance and assistance with the appropriate course of action in regards to this advisory.

The effectiveness of any workaround or fix is dependent on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Due to the variety of affected products and releases, customers should consult with their service provider or support organization to ensure any applied workaround or fix is the most appropriate for use in the intended network before it is deployed.

Customers without Service Contracts

Customers who purchase direct from Cisco but do not hold a Cisco service contract, and customers who purchase through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should acquire upgrades by contacting the Cisco Technical Assistance Center (TAC). TAC contacts are as follows.

  • +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 their product serial number available and be prepared to give the URL of this notice as evidence of entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC.

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

Exploitation and Public Announcements

The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.

The SQL injection vulnerabilities were reported to Cisco by TippingPoint's Zero Day Initiative and Cigital. They were discovered by Alberto Revelli of Cigital, Timothy Morgan of vSecurity, and Sven Taute.

The remainder of the vulnerabilities were found during internal testing and during the troubleshooting of customer service requests.

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's worldwide website at:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110427-cucm

In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news recipients.

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

Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates.


Revision History

Revision 1.0

2011-April-27

Initial public release.

Cisco Security Procedures

Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html. This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt.