requests to the ConcatServlet and WelcomeFilter are able to access protected resources within the WEB-INF directory
CVE: CVE-2021-28169
Component: jetty
CWE: CWE-200
Severity: Moderate
CVSS v3: 5.3/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Release date: 2021-06-08T00:00:00+00:00

For Eclipse Jetty versions <= 9.4.40, <= 10.0.2, <= 11.0.2, it is possible for requests to the ConcatServlet with a doubly encoded path to access protected resources within the WEB-INF directory. For example a request to `/concat?/%2557EB-INF/web.xml` can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.

Statement: In OpenShift Container Platform (OCP), the hive/presto/hadoop components that comprise the OCP metering stack, ship the vulnerable version of jetty.
Since the release of OCP 4.6, the metering product has been deprecated [1], hence the affected components are marked as wontfix.
This may be fixed in the future.

[1] https://docs.openshift.com/container-platform/4.6/release_notes/ocp-4-6-release-notes.html#ocp-4-6-metering-operator-deprecated

Red Hat OpenStack Platform's OpenDaylight will not be updated for this flaw because it was deprecated as of OpenStack Platform 14 and is only receiving security fixes for Important and Critical flaws.

Red Hat CodeReady Studio 12 is not affected by this flaw because it does not ship the vulnerable components (ConcatServlet or WelcomeFilter) of jetty.

Red Hat Enterprise Linux 8 is not affected by this flaw because it does not ship the vulnerable components (ConcatServlet or WelcomeFilter) of jetty.

Red Hat Enterprise Linux 7 ships the vulnerable component of jetty, but only in the optional repository and thus this flaw is out of support scope for Red Hat Enterprise Linux 7.

Remediation:
For OpenShift Container Platform 4.9 see the following documentation, which
will be updated shortly for this release, for important instructions on how
to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.openshift.com/container-platform/4.9/release_notes/ocp-4-9-release-notes.html

Details on how to access this content are available at
https://docs.openshift.com/container-platform/4.9/updating/updating-cluster-cli.html
Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.

The References section of this erratum contains a download link (you must log in to download the update).
Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.

The References section of this erratum contains a download link (you must log in to download the update).
Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.

Installation instructions are available from the Fuse 7.10.0 product
documentation page:
https://access.redhat.com/documentation/en-us/red_hat_fuse/7.10/
Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258