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4.8	$0-$5k	0.00

A vulnerability was found in MediaWiki (Content Management System) and classified as critical. Affected by this issue is the function Sanitizer::checkCss of the component Blacklist Filter. The manipulation with an unknown input leads to a incomplete blacklist vulnerability. Using CWE to declare the problem leads to CWE-184. The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete, leading to resultant weaknesses. Impacted is integrity. CVE summarizes:

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 a \b (backspace) character in CSS.

The weakness was presented 10/05/2013 by Kevin Israel as not defined mailinglist post (Website). The advisory is shared for download at lists.wikimedia.org. This vulnerability is handled as CVE-2013-4567 since 06/12/2013. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1562.006.

A public exploit has been developed by Kevin Israel in HTML and been published immediately after the advisory. The exploit is available at bugzilla.wikimedia.org. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 71510 (Mandriva Linux Security Advisory : mediawiki (MDVSA-2013:290)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 12810 (Mediawiki Multiple Vulnerabilities (MediaWiki Security Release: 1.21.3, 1.20.8 and 1.19.9)). The advisory illustrates:

It's worth noting that this may allow XSS (using things like behavior, -moz-binding, and JavaScript URLs), and also that there are many other ways to bypass blacklists like this one.

Upgrading to version 1.19.9, 1.20.8 or 1.21.3 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (71510). See 11233, 65746, 65745 and 65743 for similar entries.

Productinfo

Type

• Content Management System

Name

• MediaWiki

Version

• 1.19
• 1.19.0
• 1.19.1
• 1.19.2
• 1.19.3
• 1.19.4
• 1.19.5
• 1.19.6
• 1.19.7
• 1.19.8
• 1.20
• 1.20.1
• 1.20.2
• 1.20.3
• 1.20.4
• 1.20.5
• 1.20.6
• 1.20.7
• 1.21
• 1.21.1
• 1.21.2

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Incomplete blacklist
CWE: CWE-184 / CWE-183 / CWE-20
ATT&CK: T1562.006

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Kevin Israel
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 71510
Nessus Name: Mandriva Linux Security Advisory : mediawiki (MDVSA-2013:290)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 702891
OpenVAS Name: Debian Security Advisory DSA 2891-1 (mediawiki, mediawiki-extensions - security update
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Upgrade: MediaWiki 1.19.9/1.20.8/1.21.3

Timelineinfo

05/06/2013 🔍
06/12/2013 +37 days 🔍
08/19/2013 +68 days 🔍
10/05/2013 +47 days 🔍
10/05/2013 +0 days 🔍
11/14/2013 +40 days 🔍
11/15/2013 +1 days 🔍
11/22/2013 +7 days 🔍
12/04/2013 +12 days 🔍
12/13/2013 +9 days 🔍
12/18/2013 +5 days 🔍
06/02/2021 +2723 days 🔍

Sourcesinfo

Product: mediawiki.org

Advisory: lists.wikimedia.org
Researcher: Kevin Israel
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-4567 (🔍)
OVAL: 🔍

Vulnerability Center: 42460 - MediaWiki 1.19-1.19.8, 1.20-1.20.7, 1.21-1.21.2 Remote Security Bypass Vulnerability via CSS Vertical Tab, Medium
SecurityFocus: 63757 - Mediawiki Caching Session Cookies Information Disclosure Vulnerability
Secunia: 55743 - MediaWiki Session Cookies Disclosure Security Issue and Script Insertion Vulnerability, Less Critical
OSVDB: 99943

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 11/22/2013 12:17
Updated: 06/02/2021 11:25
Changes: 11/22/2013 12:17 (87), 05/16/2017 04:39 (6), 06/02/2021 11:25 (3)
Complete: 🔍

Discussion

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