CVE-2010-3718

Apache Tomcat v7.0.0 hasta v7.0.3, v6.0.x, y v5.5.x, cuando se ejecuta dentro de un SecurityManager no tiene el atributo ServletContext de sólo lectura, lo que permite a las aplicaciones web locales leer y escribir archivos fuera del directorio de trabajo previsto, como se ha demostrado mediante un ataque de salto de directorio.

Multiple vulnerabilities has been found and corrected in tomcat5. When running under a SecurityManager, access to the file system is limited but web applications are granted read/write permissions to the work directory. This directory is used for a variety of temporary files such as the intermediate files generated when compiling JSPs to Servlets. The location of the work directory is specified by a ServletContect attribute that is meant to be read-only to web applications. However, due to a coding error, the read-only setting was not applied. Therefore, a malicious web application may modify the attribute before Tomcat applies the file permissions. This can be used to grant read/write permissions to any area on the file system which a malicious web application may then take advantage of. This vulnerability is only applicable when hosting web applications from untrusted sources such as shared hosting environments. The HTML Manager interface displayed web application provided data, such as display names, without filtering. A malicious web application could trigger script execution by an administrative user when viewing the manager pages.