Lucene search

K
securityvulnsSecurityvulnsSECURITYVULNS:DOC:17366
HistoryJun 27, 2007 - 12:00 a.m.

SYMSA-2007-004: Multiple Vulnerabilities in Xythos Server Products

2007-06-2700:00:00
vulners.com
12

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

                 Symantec Vulnerability Research
                 http://www.symantec.com/research
                       Security Advisory

Advisory ID: SYMSA-2007-004
Advisory Title: Multiple Vulnerabilities in Xythos Server Products
Author: Brian Reilly / [email protected]
Release Date: 26-06-2007
Application: Xythos Enterprise Document Manager (XEDM) and Xythos
Digital Locker (XDL) 5.0 and 6.0\
Platform: All
Severity: Remotely exploitable / Full application control
Vendor status: Verified by vendor, patches available
CVE Number: CVE-2007-3254, CVE-2007-3255, CVE-2007-3256 [Requested]
Reference: http://www.securityfocus.com/bid/24521

Overview:

 Xythos Enterprise Document Manager (XEDM) is a web-based
 document management system that provides features including
 document check-in, check-out, version control, workflow,
 sharing, classification, retention schedules.  Xythos
 Enterprise Document Manager 6.0 is compliant with the U.S
 Department of Defense (DoD) 5015.2-Standard (STD) for records
 management systems.

 XEDM is vulnerable to multiple HTML and JavaScript injection
 attacks.  The application fails to sanitize user input in a
 number of locations, and these vulnerabilities can be leveraged
 to conduct stored and reflected Cross-Site Scripting (XSS) and
 Cross-Site Request Forgery (CSRF).  Although XEDM 6.0 uses
 unique action tokens to decrease the risk of CSRF, these
 tokens can be obtained via XSS thereby allowing an attacker to
 circumvent this countermeasure.  Successful exploitation can
 lead to an attacker gaining complete control of user accounts,
 directories, files, and the XEDM administrative interface.

 All XEDM users also have the ability to set the Content Type
 of their files, and subsequently share them with other XEDM
 users or external Internet users.  There is no administrative
 or server-side control to remove this ability from selected
 users, nor is there a way for administrators to globally set
 the Content Type based on file extension or actual file
 contents.  As a result, malicious XEDM users have an easy way
 to distribute URLs from a trusted XEDM server that link to
 files which may appear to be "safe," but actually contain
 dangerous content.

 Please note that XEDM was the only application tested by
 Symantec Vulnerability Research.  Based on information provided
 by Xythos, Xythos Digital Locker (XDL) is also affected by
 vulnerabilities #3, #4, and #5 described in this advisory

Details:

 Vulnerability #1:  Persistent XSS and CSRF Vulnerability in a
 File Workflow Name

 XEDMโ€™s Workflow feature allows users to manage and monitor the
 state of their documents with defined routing, reviews,
 approvals, and notifications between multiple users.  The
 application performs no input validation on the name of a
 saved Workflow, allowing an attacker to include HTML,
 JavaScript, and other active content.  Exploitation occurs
 when an administrator logs into the Xythos administrative
 interface and exports Workflow definitions.  Attackers can
 trigger arbitrary XSS and CSRF payloads, thereby gaining
 complete control of the administrative interface and
 performing such actions as changing server configuration
 options and creating, modifying, or deleting XEDM users

 Vulnerability #2:  Persistent XSS Vulnerability in a File
 Workflow Name

 There is an additional exploitation vector for Workflow names
 that contain active content.  When a user deletes a Workflow
 template that contains such content, the payload is triggered.
 Due to likely attack scenarios, this vulnerability is less
 significant than the others described in this advisory

 Vulnerability #3: Persistent XSS and CSRF Vulnerability in a
 File Content-Type Value

 All XEDM users are able to change the Content Type of all
 files in their directories to ensure they are handled by the
 correct client applications.  In addition to being displayed
 in HTTP Response headers when downloading a file, this
 information is also displayed within XEDM when users view a
 fileโ€™s properties.  The web form to set a fileโ€™s Content Type
 uses a MAXLENGTH value in an <INPUT> tag to enforce a maximum
 length of 30 characters.  However, it is trivial to set
 Content-Types of an arbitrary length above this limit by using
 a client Web proxy, a custom browser, or an HTTP API.  The
 only server-side validation performed on a user-supplied
 Content-Type is that it must contain a forward slash, allowing
 an attacker to include HTML, JavaScript, and other active
 content.  Exploitation occurs when another XDEM user views the
 fileโ€™s properties or "manages" the file.  Attackers can
 trigger arbitrary XSS and CSRF payloads, thereby gaining
 complete control of the userโ€™s account, and performing actions
 including changing file permissions, and creating, modifying
 and deleting files and directories

 Vulnerability #4: Reflected XSS Vulnerability in the File
 Upload Action

 XEDM is also vulnerable to a reflected XSS vulnerability that
 is exploited when the user uploads a file that contains HTML,
 JavaScript, or other active content in the filename.
 Successful exploitation can result in the standard XSS
 payloads. Due to likely attack scenarios, this vulnerability
 is less significant than the others described in this
 advisory.

 Vulnerability #5:  Distributing Malicious Content due to
 Misleading URLs and User-Supplied File Content Types

 As mentioned in the details of Vulnerability #3, all XEDM
 users are able to change the Content Types of all files in
 their directories.  While this behavior is similar to
 functionality offered by other web applications and web
 servers (such as the AddType directive in an Apache .htaccess
 file), there is no way for an administrator to globally set
 MIME types for certain file extensions or override user-set
 options (such as an 'AllowOverride None' directive in an
 Apache HTTP server configuration file).  As a result,
 malicious users have an easy way to distribute URLs from a
 trusted XEDM server that link to files which may appear to be
 "safe," but actually contain dangerous content.  For example,
 a URL of the syntax
 https://some.xythos.server.tld/home/jdoe/perfectlysafe.txt and
 a Content Type of application/msword could really distribute a
 payload such as a zero-day Microsoft Office exploit.  Other
 payloads include hostile executables, HTML, JavaScript, or any
 other malicious content with an arbitrary filename and the
 appropriate MIME type set

Vendor Response:
Xythos has confirmed potential security vulnerabilities in
earlier versions of the 5.0 and 6.0 releases of its server
products, the Xythos WebFile Server, Xythos Digital Locker
(XDL), and Enterprise Document Manager (XEDM). We recommend
that Xythos customers upgrade to the 5.0.25.8 or 6.0.46.1
versions of these products, planned for release by the end of
June 2007.

 Important note: One of the identified vulnerabilities, listed
 as issue #5 in the Symantec advisory (Distributing Malicious
 Content due to Misleading URLs and User-Supplied File Content
 Types), is addressed only in the 6.0 release of these server
 products, but not in release 5.0.  Xythos considers the
 resolution to this vulnerability (allowing administrators to
 disallow the editing of a file's content type by end users) to
  be a new feature, introduced in release 6.0 of XEDM/XDL.

 We encourage Xythos customers to contact Xythos Customer Support
 ([email protected]) if you have questions about these security
 issues, and to get the identified upgrades, when available.

Recommendation:
To address the vulnerabilities identified in this advisory,
current XEDM and XDL customers are strongly encouraged to upgrade
to version 5.0.25.8 or 6.0.46.1 (or higher) of the XEDM/XDL.

Common Vulnerabilities and Exposures (CVE) Information:

The Common Vulnerabilities and Exposures (CVE) project has assigned
the following names to these issues. These are candidates for
inclusion in the CVE list (http://cve.mitre.org), which standardizes
names for security problems.

 CVE-2007-3254 - XSS (#1, #2, #3, #4)

 CVE-2007-3255 - CSRF (#1, #3)

 CVE-2007-3256 - dangerous content type specification (#5)
  • -------Symantec Vulnerability Research Advisory Information-------

For questions about this advisory, or to report an error:
[email protected]

For details on Symantec's Vulnerability Reporting Policy:
http://www.symantec.com/research/Symantec-Responsible-Disclosure.pdf

Symantec Vulnerability Research Advisory Archive:
http://www.symantec.com/research/

Symantec Vulnerability Research GPG Key:
http://www.symantec.com/research/Symantec_Vulnerability_Research_GPG.asc

  • -------------Symantec Product Advisory Information-------------

To Report a Security Vulnerability in a Symantec Product:
[email protected]

For general information on Symantec's Product Vulnerability
reporting and response:
http://www.symantec.com/security/

Symantec Product Advisory Archive:
http://www.symantec.com/avcenter/security/SymantecAdvisories.html

Symantec Product Advisory PGP Key:
http://www.symantec.com/security/Symantec-Vulnerability-Management-Key.asc


Copyright (c) 2007 by Symantec Corp.
Permission to redistribute this alert electronically is granted
as long as it is not edited in any way unless authorized by
Symantec Consulting Services. Reprinting the whole or part of
this alert in any medium other than electronically requires
permission from [email protected].

Disclaimer
The information in the advisory is believed to be accurate at the
time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS
condition. There are no warranties with regard to this information.
Neither the author nor the publisher accepts any liability for any
direct, indirect, or consequential loss or damage arising from use
of, or reliance on, this information.

Symantec, Symantec products, and Symantec Consulting Services are
registered trademarks of Symantec Corp. and/or affiliated companies
in the United States and other countries. All other registered and
unregistered trademarks represented in this document are the sole
property of their respective companies/owners.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (MingW32)

iD8DBQFGfAweuk7IIFI45IARAgSvAKCQJY6MBmmTgZP+dBal/rrr5gcgPQCgjMNt
f8Esmfxk62cN2zACl5Pvst0=
=VNpO
-----END PGP SIGNATURE-----

Related for SECURITYVULNS:DOC:17366