[typo3/cms] TYPO3 CMS vulnerable to Denial of Service in Page Error Handling

Problem

Requesting invalid or non-existing resources via HTTP triggers the page error handler, which again could retrieve content to be shown as an error message from another page. This leads to a scenario in which the application is calling itself recursively – amplifying the impact of the initial attack until the limits of the web server are exceeded.

This vulnerability is very similar, but not identical, to the one described in TYPO3-CORE-SA-2021-005 (CVE-2021-21359).

Solution

Update to TYPO3 versions 9.5.38 ELTS, 10.4.33 or 11.5.20 that fix the problem described above.

References

• TYPO3-CORE-SA-2022-012

References

• https://github.com/TYPO3/typo3/security/advisories/GHSA-8c28-5mp7-v24h
• https://github.com/TYPO3/typo3/commit/1e5f44417f031c9c5a9f9d09a6a841cf89aa7b7a
• https://github.com/TYPO3/typo3/commit/73b46b6a627093112cfca4b895a198ca5e1970b7
• https://typo3.org/security/advisory/typo3-core-sa-2022-012
• https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2022-23500.yaml
• https://nvd.nist.gov/vuln/detail/CVE-2022-23500
• https://github.com/advisories/GHSA-8c28-5mp7-v24h