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TYPO3-CORE-SA-2019-001: Information Disclosure of Installed Extensions

Categories: Development
It has been discovered, that TYPO3 CMS is susceptible to information disclosure.
  • Component Type: TYPO3 CMS
  • Vulnerable subcomponent: RequireJS package configuration
  • Release Date: January 22, 2019
  • Vulnerability Type: Information Disclosure
  • Affected Versions: 8.0.0-8.7.22 and 9.0.0-9.5.3
  • Severity: Low
  • Suggested CVSS v3.0: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:F/RL:O/RC:C
  • CVE: not assigned yet

Problem Description

It has been discovered that mechanisms used for configuration of RequireJS package loading are susceptible to information disclosure. This way a potential attack can retrieve additional information about installed system and third party extensions.

Solution

Update to TYPO3 versions 8.7.23 or 9.5.4 that fix the problem described.

Strong security defaults - Manual actions required

Since this bugfix introduces new configuration, it is required to clear TYPO3 caches - which can be done either by using the TYPO3 Install Tool or the TYPO3 Console CLI tool.

Credits

Thanks to Sven Jürgens and Stefan Isak who reported this issue and to TYPO3 core team member Oliver Hader who fixed the issue.

General Advice

Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.

General Note

All security related code changes are tagged so that you can easily look them up in our review system.