Advisory ID: cisco-sa-20040129-ms03-049
For Public Release 2004 January 29 18:00 UTC (GMT)
This advisory describes a vulnerability that affects Cisco products and
applications running on Microsoft Windows 2000.
A vulnerability has been discovered that enables an attacker to execute
arbitrary code or perform a denial of service (DoS) against the server. These
vulnerabilities were discovered and publicly announced by Microsoft in their
Microsoft Security Bulletin MS03-049. More information about the vulnerability
can be found at the following URL:
All Cisco products and applications that are using unpatched Microsoft
Windows 2000 are vulnerable.
This advisory is available at
This section provides details on affected products.
To determine if a product is vulnerable, review the list below. If the
software versions or configuration information are provided, then only those
combinations are vulnerable. This is a list of appliance software which needs
patches downloaded from Cisco.
Cisco Building Broadband Service Manager (BBSM)
- BBSM Version 5.2
- HotSpot 1.0
Cisco Customer Response Application Server (CRA)
Cisco Personal Assistant (PA)
Cisco Conference Connection (CCC)
Cisco Emergency Responder (CER)
Cisco IP Call Center Express (IPCC Express)
Cisco Internet Service Node (ISN)
Other Cisco products which run on a Microsoft based operating system
should strongly consider loading the patch from Microsoft at the following
This list is not all inclusive. Please refer to Microsoft's bulletin if
you think you have an affected Microsoft platform.
Cisco Building Broadband Service Manager (BBSM) versions 5.1 and
Cisco uOne Enterprise Edition
Cisco Latitude products
Cisco Network Registrar (CNR)
Cisco Internet Service Node (ISN)
Cisco Intelligent Contact Manager (ICM) (Hosted and
Cisco IP Contact Center (IPCC) (Express and Enterprise)
Cisco E-mail Manager (CEM)
Cisco Collaboration Server (CCS)
Cisco Dynamic Content Adapter (DCA)
Cisco Media Blender (CMB)
TrailHead (Part of the Web Gateway solution)
Cisco Networking Services for Active Directory (CNS/AD)
Cisco SN 5400 Series Storage Routers (driver to interface to Windows
- CiscoWorks VPN/Security Management Solution (CWVMS)
- User Registration Tool
- Lan Management Solution
- Routed WAN Management
- Service Management
- VPN/Security Management Solution
- IP Telephony Environment Monitor
- Small Network Management Solution
- QoS Policy Manager
- Voice Manager
Cisco Transport Manager (CTM)
Cisco Broadband Troubleshooter (CBT)
DOCSIS CPE Configurator
Cisco Secure Applications
- Cisco Secure Scanner
- Cisco Secure Policy Manager (CSPM)
- Access Control Server (ACS)
- IP/VC 3540 Video Rate Matching Module
- IP/VC 3540 Application Server
Cisco IP/TV Server
No other Cisco products are currently known to be affected by these
Default installations of Microsoft Windows 2000 Server automatically
enable the Workstation service. This vulnerability is not isolated to Microsoft
Windows 2000 Workstation edition.
The Microsoft Windows 2000 Workstation service is vulnerable to buffer
overflows and denial of service (DoS) attacks. This vulnerability can be
exploited to execute arbitrary code on a computer system or to disrupt normal
operation of the server.
The vulnerability has been described in more detail at the following
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
Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at
According to Microsoft, an attacker could gain System privileges on an
affected system, or could cause the Workstation service to fail. For a full
list of symptoms and for the most up to date information, please see
Microsoft's Bulletin at the following URL:
Currently there are no known active worms exploiting this
vulnerability. However, users can protect themselves from the potential
infection by applying access control lists (ACLs).
The Workstation service receives packets on UDP and TCP ports 138, 139
and 445. Restricting traffic to these ports may help mitigate the spread of any
worm that exploits this vulnerability. Restricting traffic to these ports may
also help prevent improper access, DoS, and other non-worm related
Please also reference the Microsoft posting for additional workarounds:
Customers who have firewalls, or have deployed Network Intrusion
Detection Systems (NIDS) and/or Host Intrusion Detection Systems (HIDS) in
their network may be able to use these devices to detect attempted exploitation
or protect themselves from exploitation of this vulnerability. Customers with
these products should refer to their product documentation from their vendor
for information on how to properly configure these devices.
Cisco has made free software available to address this vulnerability
for affected customers. 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
or as otherwise set forth at Cisco.com Downloads at
Do not contact either "email@example.com" or "firstname.lastname@example.org"
for software upgrades.
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
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 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 in obtaining fixed software through their point of sale should obtain software patches and bug fixes 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)
Have your product serial number available and provide the URL of this notice as evidence of entitlement to a software patch or bug fix. Customers without service contracts should request a software patch or bug fix through the TAC.
for additional TAC contact information, including special localized telephone
numbers and instructions and e-mail addresses for use in various
The Cisco PSIRT is not aware of any active exploitation of this
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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.
This advisory will be posted on Cisco's worldwide website at
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.
email@example.com (includes CERT/CC)
Various internal Cisco mailing lists
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.
Initial public release.