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TITLE:
MediaWiki Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA48504

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/48504/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=48504

RELEASE DATE:
2012-03-23

DISCUSS ADVISORY:
http://secunia.com/advisories/48504/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/48504/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=48504

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Multiple vulnerabilities have been reported in MediaWiki, which can
be exploited by malicious users to conduct script insertion attacks
and by malicious people to disclose potentially sensitive information
and conduct cross-site request forgery attacks.

1) The application allows users to perform certain actions via HTTP
requests without performing any validity checks to verify the
requests. This can be exploited to e.g. block or unblock a user by
tricking a logged in administrator into visiting a malicious web
site.

2) An error due to the application failing to restrict access to the
user.tokens module can be exploited to disclose a user's CSRF
tokens.

3) Certain unspecified input passed to the wikitext parser when
creating a page is not properly sanitised before being used. This can
be exploited to insert arbitrary HTML and script code, which will be
executed in a user's browser session in context of an affected site
when the malicious data is being viewed.

Note: This can further be exploited to cause an infinite loop and
exhaust memory.

The vulnerabilities are reported in versions prior to 1.17.3 and
1.18.2.

SOLUTION:
Update to version 1.17.3 or 1.18.2.

PROVIDED AND/OR DISCOVERED BY:
1) The vendor credits Krenair
2) Reported in a MediaWiki bug ticket by Brion Vibber
3) Reported in a MediaWiki bug ticket by Bawolff Bawolff

ORIGINAL ADVISORY:
http://lists.wikimedia.org/pipermail/mediawiki-announce/2012-March/000109.html
http://lists.wikimedia.org/pipermail/mediawiki-announce/2012-March/000110.html

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
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private users keeping their systems up to date against the latest
vulnerabilities.

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