MediaWiki before 1.19.6 and 1.20.x before 1.20.5 does not allow extensions to prevent password changes without using both Special:PasswordReset and Special:ChangePassword, which allows remote attackers to bypass the intended restrictions of an extension that only implements one of these blocks.

The remote Debian host is missing a security update. It is, therefore, affected by multiple vulnerabilities in MediaWiki :

  - A cross-site scripting (XSS) vulnerability exists due to     a failure to validate input before returning it to the     user. An unauthenticated, remote attacker can exploit     this, via specially crafted SVG files, to execute     arbitrary script code in the user's browser session.
    (CVE-2013-2031)

  - A flaw exists in the password blocking mechanism due to     two different tools being used to block password change     requests, these being Special:PasswordReset and     Special:ChangePassword, either of which may be bypassed     by the method the other prevents. A remote attacker can     exploit this issue to change passwords. (CVE-2013-2032)

  - Multiple flaws exist in Sanitizer::checkCss due to the     improper sanitization of user-supplied input. An     unauthenticated, remote attacker can exploit these to     bypass the blacklist. (CVE-2013-4567, CVE-2013-4568)

  - A flaw exists due to multiple users being granted the     same session ID within HTTP headers. A remote attacker     can exploit this to authenticate as another random     user. (CVE-2013-4572)

  - A cross-site scripting (XSS) vulnerability exists in the     /includes/libs/XmlTypeCheck.php script due to improper     validation of user-supplied input. An unauthenticated,     remote attacker can exploit this, via a specially     crafted XSL file, to execute arbitrary script code in     the user's browser session. (CVE-2013-6452)

  - A flaw exists in the /includes/upload/UploadBase.php     script due to a failure to apply SVG sanitization when     XML files are read as invalid. An unauthenticated,     remote attacker can exploit this to upload non-sanitized     XML files, resulting in an unspecified impact.
    (CVE-2013-6453)

  - A stored cross-site (XSS) scripting vulnerability exists     in the /includes/Sanitizer.php script due to a failure     to properly validate the '-o-link' attribute before     returning it to users. An unauthenticated, remote     attacker can exploit this, via a specially crafted     request, to execute arbitrary script code in the user's     browser session. (CVE-2013-6454)

  - A flaw exists in the log API within the     /includes/api/ApiQueryLogEvents.php script that allows     an unauthenticated, remote attacker to disclose     potentially sensitive information regarding deleted     pages. (CVE-2013-6472)

  - Multiple flaws exist in the PdfHandler_body.php,     DjVu.php, Bitmap.php, and ImageHandler.php scripts when     DjVu or PDF file upload support is enabled due to     improper sanitization of user-supplied input. An     authenticated, remote attacker can exploit these, via     the use of shell metacharacters, to execute execute     arbitrary shell commands. (CVE-2014-1610)

  - A cross-site request forgery (XSRF) vulnerability exists     in the includes/specials/SpecialChangePassword.php     script due to a failure to properly handle a correctly     authenticated but unintended login attempt. An     unauthenticated, remote attacker, by convincing a user     to follow a specially crafted link, can exploit this to     reset the user's password. (CVE-2014-2665)

The remote host is affected by the vulnerability described in GLSA-201310-21 (MediaWiki: Multiple vulnerabilities)

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

    A remote attacker may be able to execute arbitrary code, perform       man-in-the-middle attacks, obtain sensitive information or perform       cross-site scripting attacks.
  Workaround :

    There is no known workaround at this time.

Changes since 1.20.4

  - (bug 46590) Add hook AbortChangePassword to     Special:ChangePassword

    - (bug 47304) SECURITY: Check SVG xml encoding against       whitelist

    - Localisation updates from http://translatewiki.net.

    - mwdocgen.php: Implement --version option.

    - Remove svnstat stuff used in Doxygen generation

    - (bug 43594) Correctly supress warnings that were       missed after the upstream

    - PHP change to E_STRICT being included in E_ALL.

    - jshint: Allow global mw to be set in mediawiki.js

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.

Changes since 1.19.5

  - (bug 47304) SECURITY: Check SVG xml encoding against     whitelist

    - (bug 46590) Added AbortChangePassword hook to allow       extensions to abort password changes from       Special:ChangePassword

    - Localisation updates from http://translatewiki.net.

    - mwdocgen.php: Implement --version option.

    - Remove svnstat stuff used in Doxygen generation

    - E_USER_DEPRECATED undefined prior to php 5.3

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.

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

  - A flaw exists because the application fails to validate     input passed via uploaded SVG files before returning it     to the user. This allows a remote attacker to conduct     cross-site scripting (XSS) attacks. (CVE-2013-2031)

  - A flaw exists that allows an attacker to bypass the     password change blocking mechanism. (CVE-2013-2032)

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

ID	Name	Product	Family	Severity
73256	Debian DSA-2891-1 : mediawiki, mediawiki-extensions Multiple Vulnerabilities	Nessus	Debian Local Security Checks	high
70677	GLSA-201310-21 : MediaWiki: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
66593	Fedora 19 : mediawiki-1.20.5-1.fc19 (2013-7654)	Nessus	Fedora Local Security Checks	medium
66503	Fedora 18 : mediawiki-1.19.6-1.fc18 (2013-7714)	Nessus	Fedora Local Security Checks	medium
66502	Fedora 17 : mediawiki-1.19.6-1.fc17 (2013-7701)	Nessus	Fedora Local Security Checks	medium
66390	MediaWiki 1.19.x < 1.19.6 / 1.20.x < 1.20.5 Multiple Vulnerabilities	Nessus	CGI abuses	medium

Detections

Analytics

CVE-2013-2032

high

Tenable Plugins

high

high

medium

medium

medium

medium