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RE: Cisco Security Advisory: Cisco Unified Presence Denial of Service Vulnerabilities (UNCLASSIFIED)
From: "Walker, Theresa A CIV DISA CSD" <theresa.walker () disa mil>
Date: Wed, 14 May 2008 17:30:24 -0400

Classification:  UNCLASSIFIED 
Caveats: NONE

Please advise

Theresa 

-----Original Message-----
From: nobody () cisco com [mailto:nobody () cisco com] On Behalf Of Cisco
Systems Product Security Incident Response Team
Sent: Wednesday, May 14, 2008 12:15 PM
To: bugtraq () securityfocus com
Cc: psirt () cisco com
Subject: Cisco Security Advisory: Cisco Unified Presence Denial of
Service Vulnerabilities

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Cisco Security Advisory: Cisco Unified Presence Denial of Service
                         Vulnerabilities

Advisory ID: cisco-sa-20080514-cup

Revision 1.0

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

Summary
=======

Cisco Unified Presence contains three denial of service (DoS)
vulnerabilities that may cause an interruption in presence services.
These vulnerabilities were discovered internally by Cisco, and there are
no workarounds.

Cisco has released free software updates that address these
vulnerabilities.

This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20080514-cup.shtml.

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

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

Cisco Unified Presence versions prior to 6.0(3) are affected by the
vulnerabilities described in this advisory.

Administrators of systems running all Cisco Unified Presence versions
can determine the software version by viewing the main page of the Cisco
Unified Presence Administration interface. The software version can be
determined by running the command show version active via the Command
Line Interface (CLI).

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

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

Details
=======

Cisco Unified Presence collects information about a user's availability
status and communications capabilities. Using information captured by
Cisco Unified Presence, applications such as Cisco Unified Personal
Communicator and Cisco Unified Communications Manager can improve
productivity by helping users connect with colleagues more efficiently
by determining the most effective means for collaborative communication.

The Presence Engine service of Cisco Unified Presence version 1.0
contains two vulnerabilities that occur when a series of malformed IP
packets are received by a vulnerable Cisco Unified Presence system and
may result in a DoS condition. There are no workarounds for these
vulnerabilities. These vulnerabilities are fixed in Cisco Unified
Presence version 6.0(1). Cisco Unified Presence version 6.0(1) is the
upgrade path for Cisco Unified Presence version 1.0. The first
vulnerability is documented in CVE-2008-1158 and Cisco Bug ID
CSCsh50164. The second vulnerability is documented in CVE-2008-1740 and
Cisco Bug ID CSCsh20972.

The SIP Proxy service of Cisco Unified Presence versions 6.0(1) and
6.0(2) contain a vulnerability that occurs when a TCP port scan is
received by a vulnerable Cisco Unified Presence system and may result in
a DoS condition. There is no workaround for this vulnerability.
This vulnerability is fixed in Cisco Unified Presence version 6.0(3).
This vulnerability is documented in CVE-2008-1741 and Cisco Bug ID
CSCsj64533.

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

* CSCsh50164 - PE Service core dumps when it receives malformed packets

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

* CSCsh20972 - PE Service core dumps under stress test

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

* CSCsj64533 - SIPD service core dumps during TCP port scan

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 any of the vulnerabilities may result in the
interruption of presence services.

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.

Fixes for all the vulnerabilities listed in this advisory are included
in Cisco Unified Presence version 6.0(3) that is available at the
following link:

http://www.cisco.com/pcgi-bin/tablebuild.pl/cup-60?psrtdcat20e2

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

There are no workarounds for these vulnerabilities.

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/products/prod_warranties_item09186a008088e31f.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/warp/public/687/Directory/DirTAC.shtml
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.

These vulnerabilities were internally discovered by Cisco.

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-20080514-cup.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-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 |             | Initial      |
| 1.0      | 2008-May-14 | 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_poli
cy.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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Classification:  UNCLASSIFIED 
Caveats: NONE


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