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Cisco Security Advisory: Cisco Collaboration Server Vulnerability


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Date: Wed, 30 Jun 2004 09:00:00 -0700
From: Cisco Systems Product Security Incident Response Team <psirt@cisco.com.>
To: [email protected]
Subject: Cisco Security Advisory: Cisco Collaboration Server Vulnerability
Cc: [email protected]


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Cisco Security Advisory: Cisco Collaboration Server Vulnerability

Revision 1.0

For Public Release 2004 June 30 1600 UTC (GMT)

Contents ======== Summary Affected Products Details Impact Software Versions and Fixes Obtaining Fixed Software Workarounds Exploitation and Public Announcements Status of This Notice: FINAL Distribution Revision History Cisco Security Procedures
Summary ======= Cisco Collaboration Server (CCS) versions earlier than 5.0 ship with ServletExec versions that are vulnerable to attack where unauthorized users can upload any file and gain administrative privileges. The workaround is documented in the Workaround section below. Cisco has provided an automated script to remove this vulnerability from the CCS 4.x versions This advisory is posted on Cisco's worldwide website at http://www.cisco.com/warp/public/707/cisco-sa-20040630-CCS.shtml Affected Products ================= Vulnerable Products - ----------------- CCS using an unpatched ServletExec version earlier than 3.0E is vulnerable. * CCS 4.x ships with ServletExec 3.0 which is vulnerable until patched. CCS 4.0 customers can patch the software with an automated script or upgrade to CCS 5.x. * CCS 3.x ships with ServletExec 2.2 which is vulnerable until patched. An automated script is not available for CCS 3.0. Customers can patch the software by following the manual instructions in the Workaround section, upgrade to CCS 4.x and patch the software with an automated script, or upgrade to CCS 5.x. Products Confirmed Not Vulnerable - ------------------------------- CCS 5.x ships with ServletExec 4.1 and is not vulnerable. Details ======= Cisco Collaboration Server utilizes the ServletExec subcomponent provided by New Atlanta for Microsoft Windows 2000 and Windows NT. ServletExec versions prior to SE 3.0E allow for an attacker to upload files to the Web server and invoke them. Cisco bug id CSCed49648. Users should either upgrade to CCS 5.x which ships with ServletExec 4.1, download the automated script for CCS 4.x, or follow the manual instructions in the Workaround section. Patching ServletExec either with the automated script or manual instructions removes the UploadServlet from the ServletExec30.jar file but does not alter the version number. The best way to test if the CCS is vulnerable is to attempt to load the http://<ccsservername>/servlet/UploadServlet URL when CCS is up and running. If this attempt results in a NullPointerException, the vulnerability is present. If this results in a Page Not Found error, then the CCS is not vulnerable. Customers can continue to obtain and apply the most current patches for ServletExec by following the instructions on the New Atlanta website: http://www.newatlanta.com/biz/c/products/servletexec/self_help/faq/detail?faqId=195 . Additionally, customers are encouraged to go to the following Cisco web pages for tips on increasing security on their CCS: http://www.cisco.com/application/pdf/en/us/guest/products/ps1001/c1067/ccmigration_09186a008020f9b4.pdf Refer to page 38 for ServletExec notes and refer to page 71 for notes on Collaboration Option. Cisco Collaboration Server (CCS) has been sold as a standalone product or as part of Cisco Web Collaboration Option where it is integrated with the Cisco Intelligent Contact Management (ICM) software. A user can determine their version level by using the *http:///<;ccs server>//version* command, where /<ccs server>/ is the hostname or IP address. Impact ====== Cisco Collaboration Server (CCS) versions earlier than 5.0 ship with ServletExec versions that are vulnerable to attack where unauthorized users can upload any file and gain administrative privileges. *CSCed49648 Software Versions and Fixes
Cisco Collaboration Server 4.x users can patch the software with an automated script available at http://www.cisco.com/cgi-bin/tablebuild.pl/ccs40, or patch the software by following the manual instructions in the Workaround section, or upgrade to CCS 5.x. Cisco Collaboration Server 3.x users can patch the software by following the manual instructions in the Workaround section, or upgrade to CCS 4.x and patch the software with an automated script, or upgrade to CCS 5.x. Obtaining Fixed Software
As the fix for this vulnerability is a default configuration change, and a workaround is available, a software upgrade is not required to address this vulnerability. However, if you have a service contract, and wish to upgrade to unaffected code, you may obtain upgraded software through your regular update channels once that software is available. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's Worldwide Web site at http://www.cisco.com. If you need assistance with the implementation of the workarounds, or have questions on the workarounds, please contact 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: [email protected] <mailto:tac@cisco.com.> See 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. 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. Workarounds =========== Manual Instructions to Patch CCS 3.x - ---------------------------------- Complete these steps to patch CCS 3.x: 1. Stop Internet Information Server (IIS). 2. Run Winzip or your favorite zip utility and open ServletExec22.jar in the C:\Program Files\new atlanta\servletexec ISAPI\lib directory. 3. Delete UploadServlet.class. 4. Save ServletExec22.jar back to its original location and exit Winzip. 5. Restart IIS. Manual Instructions to Patch CCS 4.x - ---------------------------------- Complete these steps to patch CCS 4.x: 1. Stop Internet Information Server (IIS). 2. Run Winzip or your favorite zip utility and open ServletExec30.jar in the C:\Program Files\new atlanta\servletexec ISAPI\lib directory. 3. Delete UploadServlet.class. 4. Save ServletExec30.jar back to its original location and exit Winzip. 5. Restart IIS. CCS 5.x is not vulnerable and these manual instructions do not apply. Exploitation and Public Announcements
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory. We would like to thank Matt Moore of Pentest Limited for finding and reporting this vulnerability to us. Status of This Notice: FINAL
This Advisory is provided on an "as is" basis and does not imply any kind of guarantee or warranty of any kind. Your use of the information on the Advisory or materials linked from the Advisory is at your own risk. Cisco reserves the right to change or update this notice at anytime. Distribution ============ This advisory is posted on Cisco's worldwide website at http://www.cisco.com/warp/public/707/cisco-sa-20040630-CCS.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. * [email protected] * [email protected] (includes CERT/CC) * [email protected] * [email protected] * [email protected] * [email protected] * [email protected] * [email protected] 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 2004-June-30 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/warp/public/707/sec_incident_response.shtml. This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt.
All contents are Copyright ╘ 1992-2004 Cisco Systems, Inc. All rights reserved. Important Notices <http://www.cisco.com/public/copyright.html>; and Privacy Statement <http://www.cisco.com/public/privacy.html>;. -----BEGIN PGP SIGNATURE----- Version: PGP 7.0.1 iQA/AwUBQOLlCnsxqM8ytrWQEQJ+5wCeN1ivRkc4vhtAMpRRUGsaIcmth+EAnjEO JcSZ+EqDWryx+ZiRsaPmlaCR =FVFo -----END PGP SIGNATURE-----

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