| Package | Affected versions | Patched versions |
|---|---|---|
| typo3/cms | ≥ 10.0.0, < 10.4.33≥ 11.0.0, < 11.5.20 | 10.4.3311.5.20 |
| typo3/cms-core | ≥ 10.0.0, < 10.4.33≥ 11.0.0, < 11.5.20≥ 9.0.0, < 9.5.38 | 10.4.3311.5.209.5.38 |
| typo3 | ≥ 10.0.0, < 10.4.33≥ 11.0.0, < 11.5.20≥ 9.0.0, < 9.5.38 | 10.4.3311.5.209.5.38 |
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).
Update to TYPO3 versions 9.5.38 ELTS, 10.4.33 or 11.5.20 that fix the problem described above.
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