mediawiki - multiple

Several problems have been discovered in MediaWiki, a website engine for
collaborative work.

• CVE-2011-1578 CVE-2011-1587
  Masato Kinugawa discovered a cross-site scripting (XSS) issue, which
  affects Internet Explorer clients only, and only version 6 and
  earlier. Web server configuration changes are required to fix this
  issue. Upgrading MediaWiki will only be sufficient for people who use
  Apache with AllowOverride enabled.

For details of the required configuration changes, see the upstream

announcements.

• CVE-2011-1579
  Wikipedia user Suffusion of Yellow discovered a CSS validation error
  in the wikitext parser. This is an XSS issue for Internet Explorer
  clients, and a privacy loss issue for other clients since it allows
  the embedding of arbitrary remote images.
• CVE-2011-1580
  MediaWiki developer Happy-Melon discovered that the transwiki import
  feature neglected to perform access control checks on form submission.
  The transwiki import feature is disabled by default. If it is enabled,
  it allows wiki pages to be copied from a remote wiki listed in
  $wgImportSources. The issue means that any user can trigger such an
  import to occur.
• CVE-2011-4360
  Alexandre Emsenhuber discovered an issue where page titles on private
  wikis could be exposed bypassing different page ids to index.php. In the
  case of the user not having correct permissions, they will now be redirected
  to Special:BadTitle.
• CVE-2011-4361
  Tim Starling discovered that action=ajax requests were dispatched to the
  relevant function without any read permission checks being done. This could
  have led to data leakage on private wikis.

For the oldstable distribution (lenny), these problems have been fixed in
version 1:1.12.0-2lenny9.

For the stable distribution (squeeze), these problems have been fixed in
version 1:1.15.5-2squeeze2.

For the unstable distribution (sid), these problems have been fixed in
version 1:1.15.5-5.

We recommend that you upgrade your mediawiki packages.