Debian Security Advisory

DLA-2688-1 jetty9 -- LTS security update

Date Reported:
17 Jun 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-28169.
More information:

Steven Seeley discovered that in jetty, a Java servlet engine and webserver, requests to the ConcatServlet and WelcomeFilter are able to access protected resources within the WEB-INF directory. An attacker may access sensitive information regarding the implementation of a web application.

For Debian 9 stretch, this problem has been fixed in version 9.2.30-0+deb9u2.

We recommend that you upgrade your jetty9 packages.

For the detailed security status of jetty9 please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: