Release notes/1.6

Security reminder: MediaWiki does not require PHP's register_globals setting since version 1.2.0. If you have it on, turn it off if you can.

MediaWiki 1.6.12
February 7, 2009

This is a security update to the Spring 2006 quarterly release.

A number of cross-site scripting (XSS) security vulnerabilities were discovered in the web-based installer (config/index.php). These vulnerabilities all require a live installer -- once the installer has been used to install a wiki, it is deactivated.

Note that cross-site scripting vulnerabilities can be used to attack any website in the same cookie domain. So if you have an uninstalled copy of MediaWiki on the same site as an active web service, MediaWiki could be used to attack the active service.

If you are hosting an old copy of MediaWiki that you have never installed, you are advised to remove it from the web.

MediaWiki 1.6.11
December 15, 2008

This is a security update to the Spring 2006 quarterly release.

David Remahl of Apple's Product Security team has identified a number of security issues in previous releases of MediaWiki. Subsequent analysis by the MediaWiki development team expanded the scope of these vulnerabilities. The issues with a significant impact are as follows:


 * An XSS vulnerability affecting Internet Explorer clients for all MediaWiki installations with uploads enabled. [CVE-2008-5250]
 * An XSS vulnerability affecting clients with SVG scripting capability (such as Firefox 1.5+), for all MediaWiki installations with SVG uploads enabled. [CVE-2008-5250]
 * A CSRF vulnerability affecting the Special:Import feature, for all MediaWiki installations since the feature was introduced in 1.3.0. [CVE-2008-5252]

XSS (cross-site scripting) vulnerabilities allow an attacker to steal an authorised user's login session, and to act as that user on the wiki. The authorised user must visit a web page controlled by the attacker in order to activate the attack. Intranet wikis are vulnerable if the attacker can determine the intranet URL, even if the attacker cannot access it.

CSRF vulnerabilities allow an attacker to act as an authorised user on the wiki, but unlike an XSS vulnerability, the attacker can only act as the user in a specific and restricted way. The present CSRF vulnerability allows pages to be edited, with forged revision histories. Like an XSS vulnerability, the authorised user must visit the malicious web page to activate the attack.

Rather than backport our SVG validation code to this ancient branch, we have instead disabled SVG uploads. To enable SVG uploads, please upgrade to MediaWiki 1.13.3 or later.

The other two issues have been fixed.

MediaWiki 1.6.10
February 20, 2007

This is a security and bug-fix update to the Spring 2006 quarterly release.

An XSS injection vulnerability based on Microsoft Internet Explorer's UTF-7 charset autodetection was located in the AJAX support module, affecting MSIE users on MediaWiki 1.6.x and up when the optional setting $wgUseAjax is enabled.

If you are using an extension based on the optional Ajax module, either disable it or upgrade to a version containing the fix:


 * 1.9: fixed in 1.9.3
 * 1.8: fixed in 1.8.4
 * 1.7: fixed in 1.7.3
 * 1.6: fixed in 1.6.10

There is no known danger in the default configuration, with $wgUseAjax off.


 * (bug 8819) Fix full path disclosure with skins dependencies
 * Add 'charset' to Content-Type headers on various HTTP error responses to forestall additional UTF-7-autodetect XSS issues. PHP sends only 'text/html' by default when the script didn't specify more details, which some inconsiderate browsers consider a license to autodetect the deadly, hard-to-escape UTF-7. This fixes an issue with the Ajax interface error message on MSIE when $wgUseAjax is enabled (not default configuration); this UTF-7 variant on a previously fixed attack vector was discovered by Moshe BA from BugSec: http://www.bugsec.com/articles.php?Security=24
 * Trackback responses now specify XML content type

MediaWiki 1.6.9
January 9, 2007


 * (bug 6621) Backported German translation for 'eauthentsent'
 * (bug 6680) Added localisation for Dutch bookstore list (nl)
 * (bug 6730) Clearer usage of message 'titlematch' in German translation (de)
 * XSS fix in AJAX module

An XSS injection vulnerability was located in the AJAX support module, affecting MediaWiki 1.6.x and up when the optional setting $wgUseAjax is enabled.

There is no danger in the default configuration, with $wgUseAjax off.

If you are using an extension based on the optional AJAX module, either disable it or upgrade to a version containing the fix:


 * 1.9: fixed in 1.9.0rc2
 * 1.8: fixed in 1.8.3
 * 1.7: fixed in 1.7.2
 * 1.6: fixed in 1.6.9

MediaWiki 1.6.8
July 8, 2006 MediaWiki 1.6.8 is a security and bugfix maintenance release of the Spring 2006 snapshot:

A potential HTML/JavaScript-injection vulnerability in a debugging script has been fixed. Only versions and configurations of PHP vulnerable to the $GLOBALS overwrite vulnerability are affected.

As a workaround for existing installs, profileinfo.php may simply be deleted if it's not being usemnvb4


 * Respect language directionality when displaying arrow in Special:Brokenredirects
 * (bug 6415) Typo in Parser.php
 * Fixed potential XSS in profileinfo.php

MediaWiki 1.6.7
June 6, 2006

MediaWiki 1.6.7 is a security and bugfix maintenance release of the Spring 2006 snapshot:

An HTML/JavaScript-injection vulnerability in the edit form has ´ñ closed. This vulnerability was new in 1.6.0; MediaWiki versions 1.5.x or earlier are not affected.

Extensions, comments, and  sections are now handled in a one-pass way which is more reliable and safer. Under earlier versions of MediaWiki, certain extensions could be abused to inject HTML/JavaScript into the page.

Additional precautions are made against offsite form submissions when the restricted raw HTML mode is enabled.

Some small localization and user interface updates are also included.


 * (bug 6051) Improvement to German localisation (de)
 * (bug 6017) Update bookstore list for German language (de)
 * (bug 6138) Minor grammar tweak in "loginreqlink"
 * (bug 5957) Update for Hebrew language (he)
 * Increase robustness of parser placeholders; fixes some glitches when adjacent to identifier-ish constructs such as URLs.
 * (bug 5384) Fix in extension
 * Nesting of different tag extensions and comments should now work more consistently and more safely. A cleaner, one-pass tag strip lets the 'outer' tag either take source (  -style) or pass it down to further parsing ( -style). There should no longer be surprise expansion of foreign extensions inside HTML output, or differences in behavior based on the order tags are loaded.
 * (bug 885) Pre-save transform no longer silently appends close tags
 * Pre-save transform no longer changes the case of close tags
 * Edit security precautions in raw HTML mode, etc

MediaWiki 1.6.6
May 23, 2006

MediaWiki 1.6.6 is a security and bugfix maintenance release.

An XSS injection vector in brace replacement has been fixed, as have some potential problems with table parsing. Upgrading is strongly recommended for all users of 1.6. MediaWiki versions 1.5 and earlier are not affected.

Additionally some localization and user interface updates are included.


 * Correct "revertpage" message in English
 * (bug 5507) Logouttext now uses wiki markup
 * (bugs 5857, 5957) Update for German localisation (de)
 * (bug 5586) treated text as links
 * (bug 5957) Update for Hebrew language (he)
 * (bug 6025) SpecialImport: wrong message when no file selected
 * (bug 6015) EditPage: add spacing in the boxes "edit is minor" and "watch this"
 * (bug 6018) Userrights: new message when no user specified ('nouserspecified')
 * (bug 6055) Fix for HTML/JS injection bug in variable handler (found by Nick Jenkins)
 * Reordered wiki table handling and extraction in the parser to better handle some overlapping tag cases.
 * Only the first is now turned into a TOC.
 * (bug 361) URL in URL, they were almost fixed. Now they are.

MediaWiki 1.6.5
May 2, 2006


 * Rolled back the buggy patch for bug 5497.

MediaWiki 1.6.4
May 2, 2006


 * Further improvements to Hebrew localisation
 * (bug 5544) Fix redirect arrow in Special:Listredirects for right-to-left languages
 * Replace "doubleredirectsarrow" with a content language check that picks the appropriate arrow
 * Remove live debugging hack which caused errors with certain database names
 * (bug 5510) Warning produced when using in some namespaces
 * (bug 5548) Improvements to Indonesian localisation [patch: Ivan Lanin]
 * (bug 5403) Fix Special:Newpages RSS/Atom feeds
 * (bug 3359) Add hooks on completion of file upload
 * (bug 5184) CSS misapplied to elements in Special:Allmessages due to conflicting anchor identifiers
 * (bug 5519) Allow sidebar cache to be disabled; disable it by default.
 * Add $wgReservedUsernames configuration directive to block account creation/use
 * (bug 5576) Remove debugging hack in session check
 * (bug 5181) Update "nogomatch" for Slovak
 * (bug 5594) Id translation up to '# Login and logout pages' section
 * (bug 5536) Use content language for editing help link
 * Minor improvements to English language files
 * Improvements to German localisation files
 * (bug 5628) Translations for MessagesHr.php
 * (bugs 5595, 5644) Localisation for Bosnian language (bs)
 * (bug 5592) Actions are logged with the default language for the wiki, not the language of the user performing the operation.
 * (bug 5646) Compare for identical types in wfElement
 * Fix for concurrency problem in job queue (image description page invalidation)
 * (bug 5497) regeression in HTML normalization in 1.6 (unclosed ,, )
 * (bug 5709) Allow customisation of separator for categories
 * (bug 4834) Fix XHTML output when using $wgMaxTocLevel
 * Improvements to update scripts; print out the version, check for superuser credentials before attempting a connection, and produce a friendlier error if the connection fails
 * (bug 5005): Fix XHTML output.
 * (bug 5315) "Expires: -1" HTTP header made strictly valid (using 1970 date).
 * (bug 4825): note in DefaultSettings.php about 'profiling' table creation
 * Remove unneeded extra whitespace at top of Special:Categories
 * Rewrite reassignEdits script to be more efficient; support optional updates to recent changes table; add reporting and silent modes
 * Updated initStats maintenance script
 * (bug 5723) Don't count pages linked to from the MediaWiki namespace as "wanted"
 * (bug 5789) Treat "loginreqpagetext" as wikitext
 * (bug 5796) We require MySQL >=4.0.14

MediaWiki 1.6.3
April 10, 2006


 * Fix disappearing red-linked items in the watchlist editing view
 * (bug 5512) Spacing in "page has a history" deletion warning
 * (bug 5508) Switch ENGINE in table statements back to TYPE; fixes regression where some versions of MySQL 4.0.x wouldn't work
 * Added note about $wgUrlProtocols format change

MediaWiki 1.6.2
April 8, 2006


 * Further improvements to Hebrew localisation
 * Fix 'copyright' message for Romanian
 * (bug 5476) Invalid xhtml in German localization
 * (bug 5479) Id translation for preferences tabs caption
 * (bug 5493) Id translation for special pages
 * Additional path fixes in the updater
 * (bug 5344) Fix regression that broke slashes in extension tag parameters

MediaWiki 1.6.1
April 5, 2006

Some minor issues in the 1.6.0 release have been corrected:
 * (bug 5458) Fix double-URL encoding in block log link in contribs and contribs link in block log
 * (bug 5462) Bogus missing patch warning in updater
 * (bug 5461) Use of deprecated "showhideminor" in Special:Recentchangeslinked
 * PHP warning when allow_call_time_pass_reference is off
 * Update to Finnish localization

MediaWiki 1.6.0
April 5, 2006

MediaWiki is now using a "continuous integration" development model with quarterly snapshot releases. The latest development code is always kept "ready to run", and in fact runs our own sites on Wikipedia.

Release branches will continue to receive security updates for about a year from first release, but nonessential bugfixes and feature development will take place on the development trunk and will appear in the next quarterly release.

Those wishing to use the latest code instead of a branch release can obtain it from source control.

What's new in 1.6
User interface:
 * The account creation form has been separated from the user login form.
 * Page protection/unprotection uses a new, expanded form

Templates:
 * Categories and "what links here" now update as expected when adding or removing links in a template.
 * Template parameters can now have default values, as

Uploads:
 * Optional support for rasterizing SVG images to PNG for inline display

Feeds:
 * Feed generation upgraded to Atom 1.0
 * Diffs in RSS and Atom feeds are now colored for improved readability.

Database:
 * MySQL 3.23.x support dropped; 4.0 or later required
 * Experimental support for Unicode mode of MySQL 4.1/5.0 (moderately tested)
 * Experimental Oracle support (not well tested!)

Anti-spam extension support:
 * SpamBlacklist extension now has support for automated cleanup.
 * Support for a captcha extension to restrict automated spam edits.

Numerous bug fixes and other behind-the-scenes changes have been made; see the file HISTORY for a complete change list.

Compatibility
Older PHP 4.2 and 4.1 releases are no longer supported; PHP 4 users must upgrade to 4.3 or later.

MediaWiki 1.6 is the last major version to support PHP 4; future versions will require PHP 5.

MySQL 3.23.x is no longer supported; some older hosts may need to upgrade. At this time we still recommend 4.0, but 4.1/5.0 will work fine in most cases.

Upgrading
Several changes to the database have been made from 1.5; these are relatively minor but do require that the update process be run before the new code will work properly:


 * A new "templatelinks" table tracks template inclusions.
 * A new "externallinks" table tracks URL links; this can be used by a mass spam-cleanup tool in the SpamBlacklist extension.
 * A new "jobs" table stores a queue of pages to update in the background; this is used to update links in including pages when templates are edited.

To ensure that these tables are filled with data, run refreshLinks.php after the upgrade.

If you are upgrading from MediaWiki 1.4.x or earlier, some major database changes are made, and there is a slightly higher chance that things could break. Don't forget to always back up your database before upgrading!

See the file UPGRADE for more detailed upgrade instructions.

Caveats
Some output, particularly involving user-supplied inline HTML, may not produce 100% valid or well-formed XHTML output. Testers are welcome to set $wgMimeType = "application/xhtml+xml"; to test for remaining problem cases, but this is not recommended on live sites. (This must be set for MathML to display properly in Mozilla.)

For notes on 1.5.x and older releases, see HISTORY.

Online documentation
Documentation for both end-users and site administrators is currently being built up on the MediaWiki website, and is covered under the GNU Free Documentation License.

Mailing list
A MediaWiki-l mailing list has been set up distinct from the Wikipedia wikitech-l list. A low-traffic announcements-only list is also available.

It's highly recommended that you sign up for one of these lists if you're going to run a public MediaWiki, so you can be notified of security fixes.

IRC help
There's usually someone online in #mediawiki on irc.freenode.net