Debian: 2891-2: mediawiki, mediawiki-extensions: Summary
Posted by Benjamin D. Thomas   
Debian Security Report Summary
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Debian Security Advisory DSA-2891-2                                    Thijs Kinkhorst
March 31, 2014               
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Package        : mediawiki, mediawiki-extensions
CVE ID         : CVE-2013-2031 CVE-2013-4567 CVE-2013-4568 CVE-2013-4572 
                 CVE-2013-6452 CVE-2013-6453 CVE-2013-6454 CVE-2013-6472
Debian Bug     : 729629 706601 742857 742857

In the Mediawiki update issued as DSA 2891-1, a few files were missing
from the package. This update corrects that problem. For reference, the
original advisory text follows.

Several vulnerabilities were discovered in MediaWiki, a wiki engine.
The Common Vulnerabilities and Exposures project describers the followin


    Cross-site scripting attack via valid UTF-7 encoded sequences
    in a SVG file.

CVE-2013-4567 & CVE-2013-4568

    Kevin Israel (Wikipedia user PleaseStand) reported two ways
    to inject Javascript due to an incomplete blacklist in the
    CSS sanitizer function.


    MediaWiki and the CentralNotice extension were incorrectly setting
    cache headers when a user was autocreated, causing the user's
    session cookies to be cached, and returned to other users.


    Chris from RationalWiki reported that SVG files could be
    uploaded that include external stylesheets, which could lead to
    XSS when an XSL was used to include JavaScript.


    MediaWiki's SVG sanitization could be bypassed when the XML was
    considered invalid.


    MediaWiki's CSS sanitization did not filter -o-link attributes,
    which could be used to execute JavaScript in Opera 12.


    MediaWiki displayed some information about deleted pages in
    the log API, enhanced RecentChanges, and user watchlists.


    A remote code execution vulnerability existed if file upload
    support for DjVu (natively handled) or PDF files (in
    combination with the PdfHandler extension) was enabled.
    Neither file type is enabled by default in MediaWiki.

(ID assignment pending)

    Cross site request forgery in login form: an attacker could login
    a victim as the attacker.

For the stable distribution (wheezy), these problems have been fixed in
version 1.19.14+dfsg-0+deb7u1 of the mediawiki package and 3.5~deb7u1
of the mediawiki-extensions package.

For the unstable distribution (sid), these problems have been fixed in
version 1:1.19.14+dfsg-1 of the mediawiki package and 3.5 of the
mediawiki-extensions package.

We recommend that you upgrade your mediawiki packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:

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