Cisco Security Advisory-
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 available at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20040630-CCS.
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This section provides details on affected products.
Vulnerable Products
CCS using an unpatched ServletExec version earlier than 3.0E is vulnerable.
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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.
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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.
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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.
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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
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Additionally, customers are encouraged to go to the following Cisco web pages
for tips on increasing security on their CCS:
http://www.cisco.com/en/US/docs/voice_ip_comm/cust_contact/contact_center/ipcc_enterprise/srnd/7x/c7scurty.html
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.
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Manual Instructions to Patch CCS 3.x
Complete these steps to patch CCS 3.x:
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Stop Internet Information Server (IIS).
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Run Winzip or your favorite zip utility and open ServletExec22.jar in
the C:\Program Files\new atlanta\servletexec ISAPI\lib
directory.
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Delete UploadServlet.class.
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Save ServletExec22.jar back to its original location and exit
Winzip.
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Restart IIS.
Manual Instructions to Patch CCS 4.x
Complete these steps to patch CCS 4.x:
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Stop Internet Information Server (IIS).
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Run Winzip or your favorite zip utility and open ServletExec30.jar in
the C:\Program Files\new atlanta\servletexec ISAPI\lib
directory.
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Delete UploadServlet.class.
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Save ServletExec30.jar back to its original location and exit
Winzip.
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Restart IIS.
CCS 5.x is not vulnerable and these manual instructions do not apply.
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Stop Internet Information Server (IIS).
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Cisco Collaboration Server 4.x users can patch the software with an automated script available at http://www.cisco.com/pcgi-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.
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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.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Revision 1.0
2004-June-30
Initial public release.
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