SiteKiosk - FileSystem Access

2006.12.14
Risk: Low
Local: Yes
Remote: No
CWE: N/A


CVSS Base Score: 4.1/10
Impact Subscore: 6.4/10
Exploitability Subscore: 2.7/10
Exploit range: Local
Attack complexity: Medium
Authentication: Single time
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

Still time before Christmas. ======================================================================== = SiteKiosk - FileSystem Access = = Vendor Website: = http://www.sitekiosk.com/ = = Affected Software: = SiteKiosk < 6.5.150 = = Public disclosure on Tuesday December 12, 2006 ======================================================================== == Overview == SiteKiosk is an application used to secure public access terminals. It is designed to provide a safe and stable way for the use of public access terminals with or without access to the Internet. SiteKiosk is based on Internet Explorer and can be configured to individually restrict access to Web sites, the operating system, system settings, and applications. Your computer will be protected against any manipulation from the time you boot until you shut it down. SiteKiosk suffers from a cross site scripting vulnerability, that leads to filesystem access. == Exploitation == SiteKiosk implements a 'skinning' feature so that the layout and display of the browser can be modified. The 'skinning' feature uses an HTML aware control for the modified title bar of the main SiteKiosk window. SiteKiosk displays the URL of the current location in the title bar of the main window, and therefore any HTML code in the location will be included in the title bar. By default, SiteKiosk does not properly handle the ABOUT: prefix. The URL is directly outputted to the screen leading to a normal cross site scripting vulnerability. Because the URL is also outputted to the title bar, script can be executed under the LOCAL computer zone. If a user types the following into the address box, or browses a site that sets the location to; ABOUT:hello<a href=>click here</a> The title bar will display a hyperlink. By clicking on this HREF in the main windows title bar, the filesystem will be accessed with an explorer window. SiteKiosk also installs some activeX controls that are marked 'safe for scripting'. One of these controls exposes two dangerous methods that allow a SiteKiosk user to read and download any file from the kiosk with the permissions of the user running SiteKiosk. == Solutions == A new version of SiteKiosk has been released that addresses these vulnerabilities. It can be downloaded from http://www.sitekiosk.com. == Credit == Discovered and advised to SiteKiosk November 30, 2006 by Brett Moore of Security-Assessment.com == About Security-Assessment.com == Security-Assessment.com is Australasia's leading team of Information Security consultants specialising in providing high quality Information Security services to clients throughout the Asia Pacific region. Our clients include some of the largest globally recognised companies in areas such as finance, telecommunications, broadcasting, legal and government. Our aim is to provide the very best independent advice and a high level of technical expertise while creating long and lasting professional relationships with our clients. Security-Assessment.com is committed to security research and development, and its team continues to identify and responsibly publish vulnerabilities in public and private software vendor's products. Members of the Security-Assessment.com R&D team are globally recognised through their release of whitepapers and presentations related to new security research. Security-Assessment.com is an Endorsed Commonwealth Government of Australia supplier and sits on the Australian Government Attorney-General's Department Critical Infrastructure Project panel. We are certified by both Visa and MasterCard under their Payment Card Industry Data Security Standard Programs.


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