#VU38063 Input validation error in MediaWiki - CVE-2014-9487

Vulnerability identifier: #VU38063

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2014-9487

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MediaWiki
Web applications / CMS

Vendor: MediaWiki.org

Description

The vulnerability allows remote attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can read arbitrary files, cause a denial of service, or possibly have other impact via an XML External Entity (XXE) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.19 - 1.19.22, 1.22.0 - 1.24.0

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External links
https://www.openwall.com/lists/oss-security/2015/01/03/13
https://bugzilla.redhat.com/show_bug.cgi?id=1175828
https://lists.wikimedia.org/pipermail/mediawiki-announce/2014-December/000173.html
https://security.gentoo.org/glsa/201502-04

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.