Bug 1343582

Summary:	Support sending http 451 status code from RewriteRule
Product:	Red Hat Enterprise Linux 7	Reporter:	Dasharath Masirkar <dmasirka>
Component:	httpd	Assignee:	Luboš Uhliarik <luhliari>
Status:	CLOSED ERRATA	QA Contact:	Martin Frodl <mfrodl>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	7.4	CC:	gaa, jhouska, jorton
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	httpd-2.4.6-43.el7	Doc Type:	Bug Fix
Doc Text:	The HTTP status code 451 "Unavailable For Legal Reasons" was not usable in the httpd configuration. As a consequence, modules such as mod_rewrite could not be configured to return a 451 error if required for legal purposes. The 451 status code has been added to the list of available error codes, and modules can now be configured to return a 451 error if required.	Story Points:	---
Clone Of:
Clones:	1353269 (view as bug list)		Environment:
Last Closed:	2016-11-04 08:10:58 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1353269

Description Dasharath Masirkar 2016-06-07 13:52:16 UTC

Description of problem:
The mod_rewrite (and possibly other modules) can't send a http 451 error code unless it is supported by the server, the current httpd version (httpd-2.4.6-40) in RHEL 7.2 doesn't support it. There is upstream bugzilla https://bz.apache.org/bugzilla/show_bug.cgi?id=58985 which has been resloved and patch is available which added this support.

Version-Release number of selected component (if applicable):
httpd-2.4.6-40

How reproducible:
Always.

Steps to Reproduce:
1. Add following configuration to "/etc/httpd/conf/httpd.conf".
RewriteEngine On
RewriteRule ^ - [R=451,L]
2.Now start the httpd service
# systemctl start httpd
3. Now check httpd status.
# systemctl -l status  httpd

Actual results:

The httpd fails to start with below error message.
[root@rhle7]# systemctl -l status  httpd
httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled)
   Active: failed (Result: exit-code) since Tue 2016-06-07 18:50:12 IST; 9s ago
     Docs: man:httpd(8)
           man:apachectl(8)
  Process: 26984 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=1/FAILURE)
  Process: 26982 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
 Main PID: 26982 (code=exited, status=1/FAILURE)

Jun 07 18:50:12 localhost httpd[26982]: AH00526: Syntax error on line 355 of /etc/httpd/conf/httpd.conf:
Jun 07 18:50:12 localhost httpd[26982]: RewriteRule: invalid HTTP response code '451' for flag 'R'
Jun 07 18:50:12 localhost systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
Jun 07 18:50:12 localhost kill[26984]: kill: cannot find process ""
Jun 07 18:50:12 localhost systemd[1]: httpd.service: control process exited, code=exited status=1
Jun 07 18:50:12 localhost systemd[1]: Failed to start The Apache HTTP Server.
Jun 07 18:50:12 localhost systemd[1]: Unit httpd.service entered failed state.

Expected results:

The httpd should start and allow mod_rewrite to send a http 451 error code.

Additional info:
Refer https://bz.apache.org/bugzilla/show_bug.cgi?id=58985

Comment 10 errata-xmlrpc 2016-11-04 08:10:58 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHEA-2016-2534.html