OSEC

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Cisco Security Advisory: XSS and SQL Injection in Cisco CallManager/Unified Communications Manager Logon Page

From: Cisco Systems Product Security Incident Response Team (psirtcisco.com)
Date: Wed Aug 29 2007 - 11:55:34 CDT


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Cisco Security Advisory: XSS and SQL Injection in Cisco
CallManager/Unified Communications Manager Logon Page

Advisory ID: cisco-sa-20070829-ccm

http://www.cisco.com/warp/public/707/cisco-sa-20070829-ccm.shtml

Revision 1.0

For Public Release 2007 August 29 1600 UTC (GMT)

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Summary
=======

Cisco CallManager and Unified Communications Manager are vulnerable
to cross-site Scripting (XSS) and SQL Injection attacks in the lang
variable of the admin and user logon pages. A successful attack may
allow an attacker to run JavaScript on computer systems connecting to
CallManager or Unified Communications Manager servers, and has the
potential to disclose information within the database.

Cisco has made free software available to address these vulnerabilities
for affected customers.

This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20070829-ccm.shtml.

Affected Products
=================

Vulnerable Products
+------------------

Cisco CallManager and Unified Communications Manager versions prior to
the following are affected by these vulnerabilities:

  * 3.3(5)sr2b
  * 4.1(3)sr5
  * 4.2(3)sr2
  * 4.3(1)sr1

The software version of a CallManager or Unified Communications Manager
system can be determined by navigating to "Show > Software" via the
administration interface.

For Unified Communications Manager version 5.0, the software version can
also be determined by running the command "show version active" in the
Command Line Interface (CLI).

For CallManager and Unified Communications Manager version 3.x and 4.x
systems, the software version can be determined by navigating to
"Help > About Cisco Unified CallManager" and selecting the "Details"
button via the administration interface.

Note: Cisco Unified CallManager versions 4.3, 5.1 and 6.0 have been
renamed to Cisco Unified Communications Manager. Software versions 3.3,
4.0, 4.1, 4.2 and 5.0 retain the Cisco Unified CallManager name.

Products Confirmed Not Vulnerable
+--------------------------------

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

No other versions of CallManager or Unified Communications Manager are
vulnerable.

Details
=======

Cisco Unified CallManager/Communications Manager (CUCM) is the call
processing component of the Cisco IP telephony solution which extends
enterprise telephony features and functions to packet telephony network
devices such as IP phones, media processing devices, voice-over-IP
(VoIP) gateways, and multimedia applications.

The cross-site scripting vulnerability and the SQL injection
vulnerability are triggered when a specially crafted value is entered
in the lang variable of either the admin or user logon pages. Attacks
against these vulnerabilities are conducted through the web interface
and use the http or https protocol. In the case of the cross-site
scripting vulnerability, the malicious value includes scripting code
enclosed by the <script> and </script> tags. In the case of the SQL
injection vulnerability, the value terminates the SQL call and completes
a call to the back-end database.

An attacker must be able to convince a user into following a specially
crafted URL in order to successfully exploit the cross-site scripting
vulnerability.

The cross-site scripting vulnerability is documented as bug ID
CSCsi10728.

The SQL injection vulnerability is documented as bug ID CSCsi64265.

Vulnerability Scoring Details
+----------------------------

Cisco is providing 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.

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

Cisco PSIRT will set the bias in all cases to normal. Customers
are encouraged to apply the bias parameter when determining the
environmental impact of a particular vulnerability.

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

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

XSS in Cisco CallManager User Logon and Admin Page (CSCsi10728)

CVSS Base Score - 4.3
    Access Vector - Network
    Access Complexity - Medium
    Authentication - None
    Confidentiality Impact - Partial
    Integrity Impact - None
    Availability Impact - None

CVSS Temporal Score - 3.6
    Exploitability - Functional
    Remediation Level - Official-Fix
    Report Confidence - Confirmed

SQL Injection in Cisco CallManager User Logon and Admin Page (CSCsi64265)

CVSS Base Score - 5.0
    Access Vector - Network
    Access Complexity - Low
    Authentication - None
    Confidentiality Impact - Partial
    Integrity Impact - None
    Availability Impact - None

CVSS Temporal Score - 4.1
    Exploitability - Functional
    Remediation Level - Official-Fix
    Report Confidence - Confirmed

Impact
======

An attacker could exploit the cross-site scripting vulnerability to
steal account credentials or run unauthorized JavaScript on the client
system.

An attacker could exploit the SQL injection vulnerability to read
a single value from the database. Several successful attacks could
disclose information about the database, information such as user names
and passwords, and information from call records such as the time calls
are placed and the numbers dialed. This vulnerability cannot be used to
alter or delete call record information from the database.

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 be certain that the devices scheduled
for upgrade contain sufficient memory and that current hardware and
software configurations will continue to be properly supported by
the new release. If the information is not clear, contact the Cisco
Technical Assistance Center ("TAC") or your contracted maintenance
provider for assistance.

+-----------------------------------------------------+
| Version | Fixed | Download Location |
| | Release | |
|---------+---------+---------------------------------|
| | | http://www.cisco.com/pcgi-bin/ |
| 3.3 | 3.3(5) | tablebuild.pl/callmgr-33? |
| | sr2b | psrtdcat20e2 |
|---------+---------+---------------------------------|
| | | http://www.cisco.com/pcgi-bin/ |
| 4.1 | 4.1(3) | tablebuild.pl/callmgr-41? |
| | sr5 | psrtdcat20e2 |
|---------+---------+---------------------------------|
| | | http://www.cisco.com/pcgi-bin/ |
| 4.2 | 4.2(3) | tablebuild.pl/callmgr-42? |
| | sr2 | psrtdcat20e2 |
|---------+---------+---------------------------------|
| | | http://www.cisco.com/pcgi-bin/ |
| 4.3 | 4.3(1) | tablebuild.pl/callmgr-43? |
| | sr1 | psrtdcat20e2 |
+-----------------------------------------------------+

Workarounds
===========

There are no workarounds for these vulnerabilities.

Cross-site scripting, also known as XSS, is a flaw within web
applications that enables malicious users, vulnerable websites, or
owners of malicious websites to send malicious code to the browsers
of unsuspecting users. The malicious code is usually in the form of a
script embedded in the URL of a link or the code may be stored on the
vulnerable server or malicious website. The browser will execute the
malicious script because the web content is assumed to be from a trusted
site and the browser does not have a way to validate the URL or HTML
content. A main source of XSS attacks is websites that do not properly
validate user-submitted content for dynamically generated web pages.

Because of the nature of XSS vulnerabilities, network mitigation
techniques are generally ineffective. To reduce the risk of users
becoming victims of XSS attacks, users should be educated about the
URL verification limitations of browsers. Countermeasures should also
be implemented in the browser through scripting controls. Scripting
controls do allow the ability to define policies to restrict code
execution.

For additional information on XSS attacks and the methods used to
exploit these vulnerabilities, please refer to the Cisco Applied
Intelligence Response "Understanding Cross-Site Scripting (XSS)
Threat Vectors", available at:

http://www.cisco.com/warp/public/707/cisco-air-20060922-understanding-xss.shtml.

Obtaining Fixed Software
========================

Cisco will make free software available to address this vulnerability
for affected customers. This advisory will be updated as fixed software
becomes available. 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/public/sw-license-agreement.html,
or as otherwise set forth at Cisco.com Downloads at
http://www.cisco.com/public/sw-center/sw-usingswc.shtml.

Do not contact either "psirtcisco.com" or "security-alertcisco.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 agreement 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 who do not hold a Cisco
service contract and customers who purchase through third-party vendors
but are unsuccessful at obtaining fixed software through their point
of sale should get their 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: taccisco.com

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

Refer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
for additional TAC contact information, including special 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.

This vulnerability was reported to Cisco independently by Gama SEC and
Elliot Kendall from Brandeis University. We would like to thank Gama
SEC and Elliot Kendall for bringing this issue to our attention and
for working with us toward coordinated disclosure of the issue. We
greatly appreciate the opportunity to work with researchers on security
vulnerabilities, and welcome the opportunity to review and assist in
product reports.

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://www.cisco.com/warp/public/707/cisco-sa-20070829-ccm.shtml

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-announcecisco.com
  * first-teamsfirst.org
  * bugtraqsecurityfocus.com
  * vulnwatchvulnwatch.org
  * ciscospot.colorado.edu
  * cisco-nsppuck.nether.net
  * full-disclosurelists.grok.org.uk
  * comp.dcom.sys.cisconewsgate.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 | | Initial |
| 1.0 | 2007-August-29 | 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.

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All contents are Copyright 2006-2007 Cisco Systems, Inc. All rights
reserved.
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Updated: Aug 29, 2007 Document ID: 96082

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