It was discovered that MediaWiki, a website engine for collaborative work, is vulnerable to JSONP injection in Flash (CVE-2014-5241 ) and clickjacking between OutputPage and ParserOutput (CVE-2014-5243 ). The vulnerabilities are addressed by upgrading MediaWiki to the new upstream version 1.19.18, which includes additional changes.

According to its version number, the instance of MediaWiki running on the remote host is affected by the following vulnerabilities :

  - A flaw exists due to comments not being prepended to the     JSONP callbacks. This allows a remote attacker, using a     specially crafted SWF file, to perform a cross-site     request forgery attack. (CVE-2014-5241)

  - A cross-site scripting vulnerability exists within the     'mediawiki.page.image.pagination.js' script due to a     failure to validate user-supplied input when the     function 'ajaxifyPageNavigation' calls 'loadPage'. This     allows a remote attacker, using a specially crafted     request, to execute arbitrary script code within the     trust relationship between the browser and server.
    (CVE-2014-5242)

  - A flaw exists with the iFrame protection mechanism,     related to 'OutputPage' and 'ParserOutput', which allows     a remote attacker to conduct a clickjacking attack.
    (CVE-2014-5243)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-201502-04 (MediaWiki: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in MediaWiki. Please       review the CVE identifiers and MediaWiki announcement referenced below       for details.
  Impact :

    A remote attacker may be able to execute arbitrary code with the       privileges of the process, create a Denial of Service condition, obtain       sensitive information, bypass security restrictions, and inject arbitrary       web script or HTML.
  Workaround :

    There is no known workaround at this time.

This is a major update from the 1.21 branch to the 1.23 long term support branch.

  - (bug 68187) SECURITY: Prepend jsonp callback with     comment. - CVE-2014-5241

    - (bug 66608) SECURITY: Fix for XSS issue in bug 66608:
      Generate the URL used for loading a new page in       JavaScript,instead of relying on the URL in the link       that has been clicked. - CVE-2014-5242

    - (bug 65778) SECURITY: Copy prevent-clickjacking       between OutputPage and ParserOutput. - CVE-2014-5243

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
77358	Debian DSA-3011-1 : mediawiki - security update	Nessus	Debian Local Security Checks	8/25/2014	1/11/2021	medium
77183	MediaWiki < 1.19.18 / 1.22.9 / 1.23.2 Multiple Vulnerabilities	Nessus	CGI abuses	8/13/2014	6/5/2024	medium
81227	GLSA-201502-04 : MediaWiki: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	2/9/2015	1/11/2021	critical
77400	Fedora 20 : mediawiki-1.23.2-1.fc20 (2014-9583)	Nessus	Fedora Local Security Checks	8/27/2014	1/11/2021	medium
77398	Fedora 19 : mediawiki-1.23.2-1.fc19 (2014-9548)	Nessus	Fedora Local Security Checks	8/27/2014	1/11/2021	medium

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