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Cisco Security Advisory: Cisco Cius Denial of Service Vulnerability

Advisory ID: cisco-sa-20120229-cius

Revision 1.0

For Public Release 2012 February 29 16:00  UTC (GMT)

+--------------------------------------------------------------------

Summary
=======

Cisco Cius Software contains a denial of service vulnerability that
could cause the device to stop responding. Devices running Cius
Software Versions prior to 9.2(1) SR2 are vulnerable. A remote,
unauthenticated attacker could exploit this vulnerability by sending
malicious network traffic to affected devices.

Cisco has released free software updates that address this
vulnerability.

This advisory is available at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120229-cius

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

The Cius mobile collaboration device is an Android-based platform
built for business. Cius can be used as a standalone 7-inch tablet,
or as a desk phone and multimedia collaboration device when docked in
a Cius Media Station.

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

The following products are affected by the vulnerability detailed in
this advisory:

  * Cius Wifi devices running Cius Software Version 9.2(1) SR1 and
    prior

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

Cius 4G products first shipped with Cius Software Version 9.2(2), and
are not affected by this vulnerability.

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

Details
=======

Cius software contains a vulnerability when handling malformed
traffic. A remote, unauthenticated attacker could exploit this
vulnerability to create a denial of service (DoS) condition on the
affected device.

An attacker could exploit this vulnerability by sending malicious
traffic to an affected device. Exploitation could allow the attacker
to cause the Cius to stop responding, requiring a reboot.

This vulnerability is documented in CSCto71445 and has been assigned
Common Vulnerabilities and Exposures (CVE) ID CVE-2012-0359.

Vulnerability Scoring Details
=============================

Cisco has scored the vulnerability 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


* CSCto71445 ("Cisco Cius Denial of Service Vulnerability")

CVSS Base Score - 7.8
    Access Vector -            Network
    Access Complexity -        Low
    Authentication -           None
    Confidentiality Impact -   None
    Integrity Impact -         None
    Availability Impact -      Complete

CVSS Temporal Score - 6.4
    Exploitability -           Functional
    Remediation Level -        Official-Fix
    Report Confidence -        Confirmed

Impact
======

Successful exploitation of this vulnerability may cause the device to
crash or become non-responsive, requiring a device reboot.

Software Versions and Fixes
===========================

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 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.

Cisco Cius software version 9.2(1) SR2 is available on Cisco.com and
corrects this vulnerability.

+------------------------------------------------------------+
| Affected        | Affected Version    |  First Fixed       |
| Product         |                     | Version            |
|-----------------+---------------------+--------------------|
|  Cisco Cius     |  9.2(1) SR1 and     |  9.2(1) SR2        |
|                 | prior               |                    |
+------------------------------------------------------------+


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

There are no workarounds for the vulnerability disclosed in this
advisory.

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

Cisco has released free software updates that address the
vulnerability 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,
or as set forth 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, upgrades should be obtained
through the Software Center on Cisco.com at http://www.cisco.com.

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
vulnerability that is described in this advisory.

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-20120229-cius

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 | 2012-February-29  | 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/en/US/products/products_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.

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