bypass of mod_headers rules via chunked requests
CVE: CVE-2013-5704
Component: httpd
CWE: CWE-287
Severity: Low
Release date: 2013-10-19T00:00:00+00:00

A flaw was found in the way httpd handled HTTP Trailer headers when processing requests using chunked encoding. A malicious client could use Trailer headers to set additional HTTP headers after header processing was performed by other modules. This could, for example, lead to a bypass of header restrictions defined with mod_headers.

Statement: This issue affects the versions of the httpd package as shipped with Red Hat JBoss Enterprise Application Platform 6; and Red Hat JBoss Web Server 2. Red Hat Product Security has rated this issue as having Low security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Red Hat Certificate System does not use the mod_headers module, even when installed, and is thus not affected by this flaw.

Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Red Hat JBoss Enterprise Application Platform 5 and Red Hat JBoss Web Server 1 are now in Phase 3, Extended Life Support, of their respective life cycles. This issue has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat JBoss Middleware and Red Hat JBoss Operations Network Product Update and Support Policy: https://access.redhat.com/support/policy/updates/jboss_notes/

Remediation:
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 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 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 this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
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 on how to apply this update, refer to:

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 on how to apply this update, refer to:
https://access.redhat.com/articles/11258
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 Red Hat JBoss Web Server installation (including all applications
and configuration files).
Before applying this update, make sure all previously released errata
relevant to your system have been applied and back up your existing
Red Hat JBoss Web Server installation (including all applications and
configuration files).

For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258