repository/s3/S3.php in the Amazon S3 library in Moodle through 2.2.11, 2.3.x before 2.3.9, 2.4.x before 2.4.6, and 2.5.x before 2.5.2 does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate, related to an incorrect CURLOPT_SSL_VERIFYHOST value.

The remote web server hosts Moodle, an open-source course management system.  Versions of Moodle 2.3.x prior to 2.3.9, 2.4.x prior to 2.4.6 or 2.5.x prior to 2.5.2 are exposed to the following vulnerabilities :

 - One of Moodle's dependencies, the PHP cURL Library (libcurl), contains a flaw related to domain name validation during certificate validation.  The issue is due to the server hostname not being verified to match a domain name in the Subject's Common Name (CN) or SubjectAltName field of the X.509 certificate.  This may allow a man-in-the-middle attacker to spoof SSL servers via an arbitrary certificate that appears valid.  Such an attack would allow for the interception of sensitive traffic, and potentially allow for the injection of content into the SSL stream. (CVE-2012-6087)
 - A flaw exists that may allow an attacker to carry out an SQL injection attack.  The issue is triggered when handling NULL bytes from a query string.  This may allow an attacker to inject or manipulate SQL queries in the back-end database, allowing for the manipulation or disclosure of arbitrary data. (CVE-2013-4313)
 - A flaw exists that allows a stored cross-site scripting (XSS) attack.  This flaw exists because the application does not validate input passed via links upon submission to the 'blog/external_blog_edit.php' script.  This may allow an attacker to create a specially crafted request that would execute arbitrary script code in a user's browser within the trust relationship between their browser and the server. (CVE-2013-4341)
 - A flaw exists that is due to unserialized input in the 'badges/external.php' script.  This may allow a remote attacker to inject objects leading to the deletion of arbitrary files via 'csv_export_writer::__destruct()' method in 'lib/csvlib.class.php' or conduct cross-site scripting (XSS) attacks via the 'core_badges_renderer::render_external_badge()' method in 'badges/renderer.php'. (CVE-2013-5674)

Fix for CVE-2012-6087.

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.

PHP versions 5.4.x earlier than 5.4.11 are affected by a weakness in the cURL extension that call allow SSL spoofing and man-in-the-middle attacks.

When attempting to validate a certificate, the cURL library (libcurl) fails to verify that a server hostname matches a domain name in an X.509 certificate's 'Subject Common Name' (CN) or 'SubjectAltName'.

Note that this plugin does not attempt to verify whether the PHP install has been built with the cURL extention but instead relies only on PHP's self-reported version number.

PHP versions 5.3.x earlier than 5.3.21 are affected by a weakness in the cURL extension that call allow SSL spoofing and man-in-the-middle attacks.

When attempting to validate a certificate, the cURL library (libcurl) fails to verify that a server hostname matches a domain name in an X.509 certificate's 'Subject Common Name' (CN) or 'SubjectAltName'.

Note that this plugin does not attempt to verify whether the PHP install has been built with the cURL extention but instead relies only on PHP's self-reported version number.

ID	Name	Product	Family	Severity
9418	Moodle 2.3.x < 2.3.9 / 2.4.x < 2.4.6 / 2.5.x < 2.5.2 Multiple Vulnerabilities	Nessus Network Monitor	CGI	high
64268	Fedora 17 : moodle-2.2.7-1.fc17 (2013-0968)	Nessus	Fedora Local Security Checks	medium
64266	Fedora 16 : moodle-2.1.10-1.fc16 (2013-0915)	Nessus	Fedora Local Security Checks	medium
64265	Fedora 18 : moodle-2.3.4-1.fc18 (2013-0907)	Nessus	Fedora Local Security Checks	medium
6672	PHP 5.4.x < 5.4.11 cURL X.509 Certificate Domain Name Matching MiTM Weakness	Nessus Network Monitor	Web Servers	medium
6671	PHP 5.3.x < 5.3.21 cURL X.509 Certificate Domain Name Matching MiTM Weakness	Nessus Network Monitor	Web Servers	medium

Detections

Analytics

CVE-2012-6087

medium

Tenable Plugins

high

medium

medium

medium

medium

medium