#VU40971 Command Injection in MediaWiki - CVE-2014-9277

Vulnerability identifier: #VU40971

Vulnerability risk: Medium

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

CVE-ID: CVE-2014-9277

CWE-ID: CWE-77

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 read and manipulate data.

The wfMangleFlashPolicy function in OutputHandler.php in MediaWiki before 1.19.22, 1.20.x through 1.22.x before 1.22.14, and 1.23.x before 1.23.7 allows remote attackers to conduct PHP object injection attacks via a crafted string containing <cross-domain-policy> in a PHP format request, which causes the string length to change when converting the request to <NOT-cross-domain-policy>.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.20 - 1.23.6

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External links
https://securitytracker.com/id?1031301
https://www.debian.org/security/2014/dsa-3100
https://www.openwall.com/lists/oss-security/2014/12/03/9
https://www.openwall.com/lists/oss-security/2014/12/04/16
https://lists.wikimedia.org/pipermail/mediawiki-announce/2014-November/000170.html
https://phabricator.wikimedia.org/T73478

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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.