Ispravljena su dva sigurnosna propusta u radu programskog paketa Mediawiki koji napadaču omogućuju izvođenje XSS napada te stjecanje povećanih ovlasti.

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Fedora Update Notification
FEDORA-2011-6781
2011-05-09 22:34:50
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Name        : mediawiki
Product     : Fedora 15
Version     : 1.16.5
Release     : 59.fc15
URL         : http://www.mediawiki.org/
Summary     : A wiki engine
Description :
MediaWiki is the software used for Wikipedia and the other Wikimedia
Foundation websites. Compared to other wikis, it has an excellent
range of features and support for high-traffic websites using multiple
servers

This package supports wiki farms. Read the instructions for creating wiki
instances under /usr/share/doc/mediawiki-1.16.5/README.RPM.
Remember to remove the config dir after completing the configuration.

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Update Information:

Mediawiki 1.16.5 was released to correct two security flaws:

The first issue is yet another recurrence of the Internet Explorer 6 XSS
vulnerability that caused the release of 1.16.4. It was pointed out that there
are dangerous extensions with more than four characters, so the regular
expressions we introduced had to be updated to match longer extensions.
(CVE-2011-1765)

The second issue allows unauthenticated users to gain additional
rights, on wikis where $wgBlockDisablesLogin is enabled. By default, it is
disabled. The issue occurs when a malicious user sends cookies which contain the
user name and user ID of a "victim" account. In certain circumstances, the
rights of the victim are loaded and persist throughout the malicious request,
allowing the malicious user to perform actions with the victim's rights.
(CVE-2011-1766)

$wgBlockDisablesLogin is a feature which is sometimes used on private wikis to
prevent users who have an account from logging in and viewing content on the
wiki.
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ChangeLog:

* Sun May  8 2011 Axel Thimm <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> - 1.16.5-59
- Update to 1.16.5.
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References:

  [ 1 ] Bug #702512 - CVE-2011-1765 mediawiki: two vulnerabilities fixed in
1.16.5
        https://bugzilla.redhat.com/show_bug.cgi?id=702512
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This update can be installed with the "yum" update program.  Use 
su -c 'yum update mediawiki' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

All packages are signed with the Fedora Project GPG key.  More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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