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Category:   Application (Generic)  >   BMC Remedy IT Service Management Suite Vendors:   BMC Software
BMC Remedy IT Service Management Suite Input Validation Holes Permit Cross-Site Scripting Attacks and Default Account Lets Remote Users Access the System
SecurityTracker Alert ID:  1025492
SecurityTracker URL:  http://securitytracker.com/id/1025492
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  May 5 2011
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information, User access via network
Exploit Included:  Yes  
Version(s): 7.5.00
Description:   Some vulnerabilities were reported in BMC Remedy IT Service Management Suite's BMC Knowledge Management. A remote user can conduct cross-site scripting attacks. A remote user can access an account on the target system.

Several scripts do not properly filter HTML code from user-supplied input before displaying the input. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the BMC Remedy Knowledge Management software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Some demonstration exploit URLs are provided:

https://[target]/rkm/external.jsp?doc='%3balert(1)//&user=Self+Help

https://[target]/rkm/search.jsp?user=Self+Help&startDate=\'%3balert(1)//

https://[target]/rkm/usersettings.jsp?"><script>alert(1)</script>

https://[target]/rkm/viewdoc.jsp?doc=><script>alert(1)</script>&user=Self%20Help

https://[target]/rkm/AttachmentServlet?="><script>alert(1)</script>

A remote user can bypass authentication using a default system account:

https://[target]/rkm/index.jsp?user=Self%20Help

Richard Brain of ProCheckUp Ltd. reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the BMC Remedy IT Service Management Suite software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A remote user can access the system.

A remote user can determine the installation path.

Solution:   No solution was available at the time of this entry.
Vendor URL:  www.bmc.com/ (Links to External Site)
Cause:   Access control error, Input validation error

Message History:   None.


 Source Message Contents

Subject:  PR10-13: Multiple XSS and Authentication flaws within BMC Remedy Knowledge Management

PR10-13: Multiple XSS and Authentication flaws within BMC Remedy
Knowledge Management

Vulnerability found: 17th July 2010

Vendor informed:

Vulnerability fixed:

Severity: High

Description:

BMC Remedy Knowledge Management provides service desk analysts with a
knowledge base of easy-to-find solutions and gives users self-service
search options to help them resolve issues on their own. ProCheckUp has
discovered that multiple Remedy Knowledge Management pages are
vulnerable to reflective XSS attacks, a built in self help account
allows for authentication bypass.

Version: 7.5.00    - http://www.bmc.com/


1) The following demonstrate the reflective XSS flaws

https://target-domain.foo/rkm/external.jsp?doc='%3balert(1)//&user=Self+Help

https://target-domain.foo/rkm/search.jsp?user=Self+Help&startDate=\'%3balert(1)//

https://target-domain.foo/rkm/usersettings.jsp?"><script>alert(1)</script>

https://target-domain.foo/rkm/viewdoc.jsp?doc=><script>alert(1)</script>&user=Self%20Help

Works on IE - login screen referrer XSS
https://target-domain.foo/rkm/AttachmentServlet?="><script>alert(1)</script>

Consequences:
An attacker may be able to cause execution of malicious scripting code
in the browser of a user who clicks on a link to Remedy Knowledge
Management based site. Such code would run within the security context
of the target domain. This type of attack can result in non-persistent
defacement of the target site, or the redirection of confidential
information (i.e.: session IDs) to unauthorised third parties.

2) Remedy Knowledge  Management is vulnerable to authentication bypass
by using a built in default account. (user=Self%20Help)

https://target-domain.foo/rkm/index.jsp?user=Self%20Help

The following directory requires a password to authenticate only
https://target-domain.foo/rkm/configuration


Consequences:
An attacker may be able to gain access to data held within a Remedy
Knowledge Managment based site.


Fix:
.

References:
http://www.procheckup.com/Vulnerabilities.php

Credits: Richard Brain of ProCheckUp Ltd (www.procheckup.com)

Legal:
Copyright 2010 Procheckup Ltd. All rights reserved.

Permission is granted for copying and circulating this Bulletin to the
Internet community for the purpose of alerting them to problems, if and
only if, the Bulletin is not edited or changed in any way, is attributed
to Procheckup, and provided such reproduction and/or distribution is
performed for non-commercial purposes.

Any other use of this information is prohibited. Procheckup is not
liable for any misuse of this information by any third party.
 
 


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