SEC Consult Security Advisory < 20090901-0 > ======================================================================= title: File disclosure vulnerability in JSFTemplating, Mojarra Scales and GlassFish Application Server v3 Admin console products: JSFTemplating (FileStreamer/PhaseListener component) Mojarra Scales GlassFish Application Server v3 Preview (Admin console) vulnerable version: JSFTemplating: all versions < v1.2.11 Mojarra Scales: all versions < v1.3.2 GlassFish: v3 Preview fixed version: JSFTemplating: v1.2.11 Mojarra Scales: v1.3.2 GlassFish: v2 is not affected according to vendor impact: critical homepage: https://jsftemplating.dev.java.net http://kenai.com/projects/scales https://glassfish.dev.java.net found: 2009-07-01 by: J. Greil / SEC Consult / www.sec-consult.com ======================================================================= Vendor description: ------------------- Templating for JavaServer™ Faces Technology plugs into JavaServer™ Faces to make building pages and components easy. Creating pages or components is done using a template file. JSFTemplating's design allows for multiple syntaxes, currently it supports 2 of its own plus most of the Facelets syntax. All syntaxes support all of JSFTemplating's features such as PageSession, Events & Handlers, dynamic reloading of page conent, etc. source: https://jsftemplating.dev.java.net/#what also see: http://kenai.com/projects/scales/ https://glassfish.dev.java.net/ Vulnerability overview/description: ----------------------------------- The JSFTemplating FileStreamer functionality (when using the PhaseListener), basically used for including static or dynamic content, such as Yahoo UI API files with Mojarra Scales, is vulnerable to * file disclosure and also allows an attacker * to retrieve directory listings of the whole server Furthermore Mojarra Scales and the GlassFish Application Server (v3 Preview) Admin console are using vulnerable components too. JSFTemplating/FileStreamer can be exploited to read sensitive application data on the whole server depending on the configuration. One tested server allowed us to access all files on the server (with rights of the webserver user), another server was restricted to files within the webroot (but including WEB-INF) - it might depend on the Java Security Model or filesystem rights. An attacker is able to gain sensitive data such as configuration files (WEB-INF/web.xml), the whole source code of the application or other sensitive data on the server. Furthermore it is possible to retrieve directory listings of directories on the whole server and the webroot by specifying a directory instead of a file. Proof of concept: ----------------- The URLs to exploit this vulnerability may differ from server to server. The vulnerable HTTP parameters are usually named "filename" or "file". By specifying the following URLs an attacker gains access to sensitive configuration files, source code or other possibly sensitive files: ======================== /jsft_resource.jsf?contentSourceId=resourceCS&filename=WEB-INF/web.xml /jsft_resource.jsf?contentSourceId=resourceCS&filename=index.jsp /jsft_resource.jsf?contentSourceId=resourceCS&filename=at/mycompany/ /jsft_resource.jsf?contentSourceId=resourceCS&filename=at/mycompany/some.class ======================== By using an empty value for the file/filename parameter, a directory listing of the webroot is being shown. Directory traversal is also possible but it depends on the installation/configuration whether it is possible to access data outside the webroot. ======================== /scales_static_resource.jsf?file= /scales_static_resource.jsf?file=../../../../../../etc/ /scales_static_resource.jsf?file=../../../../../../etc/passwd ======================== Vulnerable versions: -------------------- JSFTemplating: * all versions < v1.2.11 Mojarra Scales: * all versions < v1.3.2 GlassFish: * v3 Preview (Admin console) According to the vendor, GlassFish v2 does not use vulnerable components. Vendor contact timeline: ------------------------ 2009-07-07: Contacting the developers of JSFTemplating by email. 2009-07-07: Very fast response from the developers by email and IRC, initial attempts to fix the issue were being made 2009-07-08: Agreed on taking a further look into the issue by the end of July 2009-07-30: Contacted the developers again, they need more time 2009-08-10/13: Asked the developers for any news 2009-08-14: Anwser that the fix will make it into next release 2009-08-31: Fixes for JSFTemplating and Mojarra Scales available 2009-09-01: Coordinated release date Special thanks to Jason and Ken! Solution: --------- * Upgrade to the latest version of JSFTemplating, v1.2.11 has the fix: http://download.java.net/maven/1/com.sun.jsftemplating/jars/ CVS commit logs with some information regarding new security features can be found here: https://jsftemplating.dev.java.net/servlets/BrowseList?listName=cvs&by=date&from=2009-08-01&to=2009-08-31&first=1&count=16 * Upgrade to the latest version of Mojarra Scales, v1.3.2 has the fix: http://kenai.com/projects/scales/downloads/directory/Mojarra%20Scales%201.3.2/ * GlassFish: Use the current stable version v2 or see workaround section for v3. Workaround: ----------- GlassFish v3 Preview: Use strong passwords for the GlassFish Admin console and restrict access to the Admin console port (4848). Advisory URL: ------------- https://www.sec-consult.com/advisories_e.html#a61 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Unternehmensberatung GmbH Office Vienna Mooslackengasse 17 A-1190 Vienna Austria Tel.: +43 / 1 / 890 30 43 - 0 Fax.: +43 / 1 / 890 30 43 - 25 Mail: research at sec-consult dot com www.sec-consult.com SEC Consult conducts periodical information security workshops on ISO 27001/BS 7799 in cooperation with BSI Management Systems. For more information, please refer to https://www.sec-consult.com/academy_e.html EOF J. Greil / @2009