https://bugzilla.wikimedia.org/show_bug.cgi?id=21998
Summary: Unable to install; config/index.php gives 403 due to
mod_security
Product: MediaWiki
Version: 1.15.1
Platform: Other
OS/Version: Linux
Status: NEW
Severity: blocker
Priority: Normal
Component: Installation
AssignedTo: wikibugs-l@lists.wikimedia.org
ReportedBy: ar...@musys.nl
When trying to install Mediawiki as usual I get a 403 after finishing
config/index.php
The server log shows: Message: Operator GT matched 1 at TX:arg_name_DBmwschema.
[file
"/etc/httpd/modsecurity.d/base_rules/modsecurity_crs_40_generic_attacks.conf"]
[line "28"] [msg "Possible HTTP Parameter Pollution Attack: Multiple Parameters
with the same Name."]
Sitename=demo&
EmergencyContact=XXXXX&
LanguageCode=en&
License=none&
SysopName=admin&
SysopPass=XXXX&
SysopPass2=XXXX&
Shm=none&
MCServers=&
Email=email_enabled&
Emailuser=emailuser_enabled&
Enotif=enotif_allpages&
Eauthent=eauthent_enabled&
DBtype=mysql&
DBserver=localhost&
DBname=test&
DBuser=wiki&
DBpassword=XXXX&
DBpassword2=XXXX&
useroot=on&
RootUser=wiki&
RootPW=XXXX&
DBprefix=&
DBengine=InnoDB&
DBschema=mysql5-binary&
DBport=5432&
DBmwschema=mediawiki&
DBts2schema=public&
SQLiteDataDir=&
DBprefix2=&
DBport_db2=50000&
DBmwschema=mediawiki&
DBcataloged=cataloged
Tracking down further I notice "DBmwschema" mentioned twice in the url
parameters, so mod_security's message "Possible HTTP Parameter Pollution
Attack: Multiple Parameters with the same Name" seems correct indeed.
I guess that line 634 of config/index.php is redundant with line 621
$conf->DBmwschema = importPost( "DBmwschema", "mediawiki" );
However, commenting out line 634 did not solve the problem.
Disabling mod_security (v 2.5.10-2.fc11) worked as a workaround.
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