Vulnerability identifier: #VU23664

Vulnerability risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MKSamlAuth
Web applications / Modules and components for CMS

Vendor: DMK E-BUSINESS GmbH

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the affected extension fails to validate the response from the Identity Provider. A remote attacker can bypass authentication process and create various frontend users on affected TYPO3 websites.

Note: The authentication service allows to bypass frontend user authentication by providing a valid username with an empty password, if a SAML configuration is not created for the current website domain.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MKSamlAuth: 8.7.0 - 9.5.2

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External links
http://typo3.org/security/advisory/typo3-ext-sa-2019-019/

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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.