Description

When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a redirect to a directory (e.g. redirecting to '/foo/' when the user requested '/foo') a specially crafted URL could be used to cause the redirect to be generated to any URI of the attackers choice.

Mitigation

We recommend upgrading to a version of this component that is not vulnerable to this specific issue.

Workaround:
>Use mapperDirectoryRedirectEnabled="true" and mapperContextRootRedirectEnabled="true" on the Context to ensure that redirects are issued by the Mapper rather than the default Servlet. See the Context configuration documentation for further important details.

Reference: [http://mail-archives.us.apache.org/mod_mbox/www-announce/201810.mbox/%[email protected]%3E](http://mail-archives.us.apache.org/mod_mbox/www-announce/201810.mbox/%[email protected]%3E)

Related links:

• http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-11784

• http://mail-archives.us.apache.org/mod_mbox/www-announce/201810.mbox/%[email protected]%3E

• https://tomcat.apache.org/security-7.html

• https://tomcat.apache.org/security-8.html

• https://tomcat.apache.org/security-9.html