#VU31328 Input validation error in MediaWiki - CVE-2017-0370

Vulnerability identifier: #VU31328

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-0370

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MediaWiki
Web applications / CMS

Vendor: MediaWiki.org

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

Mediawiki before 1.28.1 / 1.27.2 / 1.23.16 contains a flaw were Spam blacklist is ineffective on encoded URLs inside file inclusion syntax's link parameter.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.28.0

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External links
https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-April/000207.html
https://phabricator.wikimedia.org/T48143
https://security-tracker.debian.org/tracker/CVE-2017-0370

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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.