Memory exhaustion issue in HttpReadListener via "Expect: 100-continue" header
CVE: CVE-2020-10705
Component: undertow
CWE: CWE-400
Severity: Important
CVSS v3: 7.5/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Release date: 2020-05-11T00:00:00+00:00

A flaw was discovered in Undertow where certain requests to the "Expect: 100-continue" header may cause an out of memory error. This flaw may potentially lead to a denial of service.


Remediation:
Before applying this update, back up your existing Red Hat JBoss Enterprise Application Platform installation and deployed applications.

For details about how to apply this update, which includes the changes described in this advisory, see:

https://access.redhat.com/articles/11258
Before applying this update, ensure all previously released errata relevant to your system have been applied.

For details about how to apply this update, see:

https://access.redhat.com/articles/11258
Before applying this update, ensure all previously released errata relevant to your system have been applied. Also, back up your existing installation, including all applications, configuration files, databases and database settings. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Before applying this update, back up your existing Red Hat JBoss Enterprise Application Platform installation and deployed applications.

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258
Before applying this update, ensure all previously released errata relevant to your system have been applied.

For details about how to apply this update, see:

https://access.redhat.com/articles/11258
Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details about how to apply this update, see:

https://access.redhat.com/articles/11258
Before applying this update, ensure all previously released errata relevant to your system have been applied.

For details about how to apply this update, see:

https://access.redhat.com/articles/11258
Before applying this update, back up your existing Red Hat JBoss Enterprise Application Platform installation and deployed applications.

You must restart the JBoss server process for the update to take effect.

The References section of this erratum contains a download link (you must log in to download the update)
Before applying this update, back up your existing Red Hat JBoss Enterprise Application Platform installation and deployed applications.

The References section of this erratum contains a download link (you must log in to download the update).

The JBoss server process must be restarted for the update to take effect.
Before applying this update, back up your existing Red Hat JBoss Enterprise Application Platform installation and deployed applications.

The References section of this erratum contains a download link (you must log in to download the update).

The JBoss server process must be restarted for the update to take effect.
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 for the update. You must be logged in to download the update.
There is currently no known mitigation for this security flaw.