MediaWiki 1.9.3, 1.8.4, 1.7.3, 1.6.10 released

February 20, 2007

MediaWiki 1.9.3 is a security and bug-fix update to the Winter 2007
quarterly release. Minor compatibility fixes for IIS and PostgreSQL are

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 8992) Fix a remaining raw use of REQUEST_URI in history
* (bug 8984) Fix a database error in Special:Recentchangeslinked
when using the PostgreSQL database.
* 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:
* Trackback responses now specify XML content type

Full release notes:


Patch against 1.9.2:

Downloads, checksums, and GPG signatures for all versions:

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Posted by Brion Vibber 2007-03-23

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