Title: Caucho Technology Resin JavaBean Disclosure Vulnerability
Severity: MODERATE
Description:
Caucho Technology Resin is a servlet and JSP engine that supports java and javascript.
A vulnerability exists in Resin which could enable a remote attacker to obtain a known JavaBean file residing on the target host.
JavaBeans are pre-compiled java components often used to create web-based applications. While they are used to create applications, the webserver protects the individual JavaBean files by placing them in a 'forbidden' directory. By default, this directory is '/WEB-INF/classes/'.
Under normal circumstances, an attempt by a client to request a JavaBean file will result in an error 403 message from the webserver.
Due to a flaw in the way Resin handles certain HTTP requests, it is possible for a remote attacker to gain read access to any known JavaBean file dispite the forbidden directory it resides in.
This condition can be triggered if the attacker sends a request with the string '.jsp' prepending the path of the JavaBean. It is most likely that the presence of '.jsp' changes the interpretation of the request, causing normal directory protection to be overridden.
Upon successful exploitation, the attacker will have obtained the JavaBean file. Sensitive information contained in these files (especially custom-written JavaBeans) may be disclosed to the attacker.
Affected Products:
- Caucho Technology Resin 1.2.0
- Caucho Technology Resin 1.3.0
References:
- Caucho Technology: Caucho Technology Homepage
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