Moodle 'external.php' 'badge' Parameter XSS

medium Nessus Plugin ID 70023

Synopsis

The remote web server hosts a PHP script that is affected by a cross- site scripting vulnerability.

Description

The version of Moodle installed on the remote host fails to properly sanitize user-supplied input to the 'badge' parameter of the 'external.php' script. The application also fails to properly sanitize serialized objects. An attacker can exploit these issues by crafting a URL containing a serialized object that will inject arbitrary HTML or script code in a users browser. By enticing a user to view this URL, the attacker can exploit these flaws.

Note that the unserialization attack mentioned here can be used to perform additional attacks; however, Nessus has only tested for a cross-site scripting vulnerability.

Solution

Upgrade to version 2.5.2 or later

See Also

https://www.securityfocus.com/archive/1/528652/30/0/threaded

https://moodle.org/mod/forum/discuss.php?d=238397

http://docs.moodle.org/dev/Moodle_2.5.2_release_notes

Plugin Details

Severity: Medium

ID: 70023

File Name: moodle_external_badges_xss.nasl

Version: 1.10

Type: remote

Published: 9/20/2013

Updated: 6/6/2024

Configuration: Enable thorough checks

Supported Sensors: Nessus

Enable CGI Scanning: true

Risk Information

CVSS Score Rationale: Cvss vector for cross site scripting vulnerability

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS Score Source: manual

Vulnerability Information

CPE: cpe:/a:moodle:moodle

Required KB Items: www/PHP, installed_sw/Moodle

Excluded KB Items: Settings/disable_cgi_scanning

Exploit Ease: No exploit is required

Patch Publication Date: 9/9/2013

Vulnerability Publication Date: 9/15/2013

Reference Information

CVE: CVE-2013-5674

BID: 62412

CWE: 20, 442, 629, 711, 712, 722, 725, 74, 750, 751, 79, 800, 801, 809, 811, 864, 900, 928, 931, 990