#VU42094 Input validation error in MediaWiki - CVE-2014-1610

Vulnerability identifier: #VU42094

Vulnerability risk: Low

CVSSv4.0: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2014-1610

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
MediaWiki
Web applications / CMS

Vendor: MediaWiki.org

Description

The vulnerability allows a remote #AU# to read and manipulate data.

MediaWiki 1.22.x before 1.22.2, 1.21.x before 1.21.5, and 1.19.x before 1.19.11, when DjVu or PDF file upload support is enabled, allows remote attackers to execute arbitrary commands via shell metacharacters in (1) the page parameter to includes/media/DjVu.php; (2) the w parameter (aka width field) to thumb.php, which is not properly handled by includes/media/PdfHandler_body.php; and possibly unspecified vectors in (3) includes/media/Bitmap.php and (4) includes/media/ImageHandler.php.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.19.0 - 1.19.10, 1.21.1 - 1.22.1

---

External links
https://lists.fedoraproject.org/pipermail/package-announce/2014-February/127942.html
https://lists.fedoraproject.org/pipermail/package-announce/2014-February/127948.html
https://lists.wikimedia.org/pipermail/mediawiki-announce/2014-January/000140.html
https://osvdb.org/102630
https://secunia.com/advisories/56695
https://secunia.com/advisories/57472
https://www.checkpoint.com/defense/advisories/public/2014/cpai-26-jan.html
https://www.checkpoint.com/threatcloud-central/articles/2014-01-28-tc-researchers-discover.html
https://www.debian.org/security/2014/dsa-2891
https://www.exploit-db.com/exploits/31329/
https://www.osvdb.org/102631
https://www.securityfocus.com/bid/65223
https://www.securitytracker.com/id/1029707
https://bugzilla.wikimedia.org/attachment.cgi?id=14361&action=diff
https://bugzilla.wikimedia.org/attachment.cgi?id=14384&action=diff
https://bugzilla.wikimedia.org/show_bug.cgi?id=60339
https://gerrit.wikimedia.org/r/#/c/110069/
https://gerrit.wikimedia.org/r/#/c/110069/2/includes/media/Bitmap.php
https://gerrit.wikimedia.org/r/#/c/110215/

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.