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
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.
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:
It is possible to set the context path outside of the resin-doc and read any file on alternate web roots:
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:
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
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.
Vendor Notification: May 5, 2006 Vendor Response: May 9, 2006 Vendor Fix: May 15, 2006 Coordinated public release of advisory: May 16, 2006
ScanAlert's mission is to make the web safe from hackers.
We make web sites secure from hackers and certify it to their customers via our patent pending HACKER SAFE® security certification technology. Our daily security audits and real-time certification enables consumers to know whether the sites where they shop are taking the necessary steps to safeguard their personal information from hackers. By alleviating consumers' fears of identity theft and credit card fraud, online merchants who earn HACKER SAFE certification consistently see substantial increases in online transactions
For additional information regarding ScanAlert and the Hacker Safe program please contact:
Joseph Pierini, CISSP | Director, Enterprise Services ScanAlert ( www.scanalert.com) 860 Napa Valley Corporate Way Suite R Napa, CA 94558 Phone: 877 302-9965 Int'l: 707 224-7656 Fax: 707 252-9626 Email: email@example.com