Authentication bypass in TYPO3 - #VU13827
Published: July 12, 2018
Vulnerability identifier: #VU13827
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-592
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: TYPO3
Affected software:
TYPO3
TYPO3
Detailed vulnerability 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).
Remediation
Update to version 7.6.30, 8.7.17 or 9.3.1.