Digital Security Research Group [DSecRG] Advisory #DSECRG-09-029 Application: Oracle Business Intelligence Enterprise Edition ( Versions Affected: Oracle Business Intelligence Enterprise Edition ( Vendor URL: Bugs: Response Splitting/XSS/phishing credentials Exploits: YES Reported: 03.03.2009 Vendor response: 04.03.2009 Last response: 05.03.2009 Tracking number: 14088913 Date of Public Advisory: 25.10.2010 CVE: CVE-2010-2413 Authors: Alexandr Polyakov Digital Security Research Group [DSecRG] (research [at] dsecrg [dot] com) Description *********** Response Splitting Vulnerability found in Oracle Business Intelligence (BI Publisher Enterprise) This vulnerability may be used as XSS or for Phishing user (PHiXSS) credentials using fake response from server Details ******* Response Splitting Vulnerability found in script /xmlpserver vulnerable parameter "_xuil" If we send request whith CRLF sumbols in "_xuil" parameter we can generate own server request. it is possible for an attacker to terminate the "current" response (by injecting the necessary HTTP response headers), and then to add his/her own additional complete HTTP response. The attacker can then orchestrate the traffic in such a way that when an additional request is sent it appears to generate the additional response. When an attacker succeeds in sending a crafted request, and it is responded with the crafted response, there are two (perhaps more) ways in which this condition can be exploited: 1. Cross Site Scripting: basically, the crafted (second response) would contain a malicious client side (e.g. Javascript) code, which can steal the client cookies and credentials. The attacker would send the client (victim) a page that will cause two HTTP requests to be sent to the vulnerable site. The first request "attacks" the web-site and causes the split HTTP response to be sent (that is, two HTTP responses will be sent back by the web server). Then, when the second HTTP request is sent by the browser, it (e.g. Internet Explorer) assumes the second HTTP response is the actual server response for the (second) request, thus it will render the content of the second response, and execute the malicious script. 2. So when user click on link we can give him fake login page instead of XSS and steal his credentials. Example ******* request: GET /xmlpserver/?_xuil=aaaaaaaaaa%0d%0a%0d%0a%0d%0a%0d%0a HTTP/1.0 Response: ---------------------------- HTTP/1.1 200 OK Date: Tue, 03 Mar 2009 17:51:21 GMT Server: Oracle Containers for J2EE Content-Length: 7466 Set-Cookie: ORA_XDO_UI=aaaaaaaaaa ; Comment=Oracle XML Publisher Cookie; Domain=.0.0.0; Expires=Wed, 03-Mar-2010 17:51:22 GMT; Path=/xmlpserver Set-Cookie: JSESSIONID=ac10006525e85e9ceb6e5e4846d6bcd0e9ceb6a0b2a3; path=/xmlpserver Cache-Control: private Connection: close Content-Type: text/html; charset=UTF-8 ....................... --------------------------------------- So when user click on link we can execute XSS or give him fake login page and steal his credentials. Fix Information *************** Information was published in CPU October 2010. All customers can download CPU patches following instructions from: Credits ******* Oracle gives thanks to Alexander Polyakov from Digital Security Company in CPU October 2010. Current advisory: About ***** Digital Security is one of the leading IT security companies in CEMEA, providing information security consulting, audit and penetration testing services, ERP and SAP security assessment, certification for ISO/IEC 27001:2005 and PCI DSS and PA DSS standards. Digital Security Research Group focuses on enterprise application (ERP) and database security problems with vulnerability reports, advisories and whitepapers posted regularly on our website. Contact: research [at] dsecrg [dot]com Polyakov Alexandr. PCI QSA,PA-QSA CTO Digital Security Head of DSecRG ______________________ DIGITAL SECURITY phone: +7 812 703 1547 +7 812 430 9130 e-mail: ----------------------------------- This message and any attachment are confidential and may be privileged or otherwise protected from disclosure. If you are not the intended recipient any use, distribution, copying or disclosure is strictly prohibited. If you have received this message in error, please notify the sender immediately either by telephone or by e-mail and delete this message and any attachment from your system. Correspondence via e-mail is for information purposes only. Digital Security neither makes nor accepts legally binding statements by e-mail unless otherwise agreed. -----------------------------------