Vulnerability identifier: #VU13827

Vulnerability risk: High

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

CVE-ID: N/A

CWE-ID: CWE-592

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TYPO3
Web applications / CMS

Vendor: TYPO3

Description

The vulnerability allows a remote attacker to bypass authentication authentication process.

The vulnerability exists due to an error within the Salted Password system extension (ext:saltedpasswords) when using hashing methods which are related by PHP class inheritance. A remote attacker can bypass authentication and login under any user account using an existing username.

Successful exploitation requires that MD5 is used as a default hashing algorithm (not the default configuration).

Mitigation
Update to version 7.6.30, 8.7.17 or 9.3.1.

Vulnerable software versions

TYPO3: 7.6.0 - 7.6.29, 8.0.0 - 8.7.16, 9.0.0 - 9.3.0

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External links
http://typo3.org/security/advisory/typo3-core-sa-2018-001/

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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.