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Last updated: 4/15/2014

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Vulnerability Summary for CVE-2013-4568

Original release date: 12/13/2013
Last revised: 12/16/2013
Source: US-CERT/NIST

Overview

Incomplete blacklist vulnerability in Sanitizer::checkCss in MediaWiki before 1.19.9, 1.20.x before 1.20.8, and 1.21.x before 1.21.3 allows remote attackers to conduct cross-site scripting (XSS) attacks via certain non-ASCII characters in CSS, as demonstrated using variations of "expression" containing (1) full width characters or (2) IPA extensions, which are converted and rendered by Internet Explorer.

Description

Per: http://cwe.mitre.org/data/definitions/184.html "CWE-184: Incomplete Blacklist"

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.3 (MEDIUM) (AV:N/AC:M/AU:N/C:N/I:P/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable; Victim must voluntarily interact with attack mechanism
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized modification

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External Source: FEDORA
Name: FEDORA-2013-21856
External Source: MLIST
Name: [MediaWiki-announce] 20131114 MediaWiki Security Release: 1.21.3, 1.20.8 and 1.19.9
External Source: MISC
Name: https://bugzilla.wikimedia.org/attachment.cgi?id=13452&action=diff
External Source: FEDORA
Name: FEDORA-2013-21874
External Source: CONFIRM
Name: https://bugzilla.wikimedia.org/show_bug.cgi?id=55332

Technical Details

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