Executive Summary

This vulnerability in TYPO3 CMS affects the Password Generation component, where generated passwords start with a predictable three-character prefix (a lower-case letter, an upper-case letter, and a digit). This deterministic prefix reduces the overall entropy of the passwords, making them easier to guess through brute-force attacks. Passwords generated using random password rules are not affected. [1]

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Impact Analysis

Because the passwords generated by TYPO3 CMS have a predictable prefix, attackers can perform brute-force attacks more efficiently, increasing the risk of unauthorized access to systems using these passwords. This weakens the security of accounts relying on the affected password generation method. [1]

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Detection Guidance

This vulnerability can be detected by examining generated passwords from the TYPO3 CMS Password Generation component. Specifically, check if passwords generated by the affected TYPO3 versions start with a deterministic three-character prefix consisting of a lower-case letter, an upper-case letter, and a digit. There are no specific commands provided to detect this vulnerability automatically, but you can script a check to identify passwords beginning with this predictable pattern. [1]

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Mitigation Strategies

The immediate mitigation step is to update TYPO3 CMS to versions 12.4.37 LTS or 13.4.18 LTS, which fix the entropy issue in the Password Generation component. Additionally, follow TYPO3 Security Guide recommendations and subscribe to the typo3-announce mailing list for future updates. [1]

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