Improper Authentication in MediaWiki

1) Improper Authentication

EUVDB-ID: #VU45032

Risk: Medium

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

CVE-ID: CVE-2011-1766

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

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

includes/User.php in MediaWiki before 1.16.5, when wgBlockDisablesLogin is enabled, does not clear certain cached data after verification of an auth token fails, which allows remote attackers to bypass authentication by creating crafted wikiUserID and wikiUserName cookies, or by leveraging an unattended workstation.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.1.0 - 1.16.3

CPE2.3

• cpe:2.3:a:mediawiki_org:mediawiki:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.2.4:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.2.5:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.2.6:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.3:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.3.0:*:*:*:*:*:*:*

External links

https://lists.fedoraproject.org/pipermail/package-announce/2011-May/060435.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-May/060496.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-May/060507.html
https://lists.wikimedia.org/pipermail/mediawiki-announce/2011-May/000098.html
https://secunia.com/advisories/44684
https://www.securityfocus.com/bid/47722
https://bugzilla.redhat.com/show_bug.cgi?id=702512
https://bugzilla.wikimedia.org/show_bug.cgi?id=28639

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.