GHSA-4p9g-qgx9-397p Denial of Service in Page Error Handling

• Packagist typo3/cms-core: >= 10.0.0, < 10.4.14 → fixed in 10.4.14 • Packagist typo3/cms-core: >= 11.0.0, < 11.1.1 → fixed in 11.1.1 • Packagist typo3/cms-core: >= 9.0.0, < 9.5.25 → fixed in 9.5.25 • Packagist typo3/cms: >= 10.0.0, < 10.4.14 → fixed in 10.4.14 • Packagist typo3/cms: >= 11.0.0, < 11.1.1 → fixed in 11.1.1 • Packagist typo3/cms: >= 9.0.0, < 9.5.25 → fixed in 9.5.25

> ### Meta > * CVSS: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:F/RL:O/RC:C` (5.5) > * CWE-405, CWE-674 > * Status: DRAFT Problem Requesting invalid or non-existing resources via HTTP triggers the page error handler which again could retrieve content to be shown as 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. Solution Update to TYPO3 versions 9.5.25, 10.4.14, 11.1.1 that fix the problem described. Credits Thanks to Paul Keller, Mathias Bolt Lesniak and Kay Strobach who reported this issue and to TYPO3 framework merger Frank Nägler and to TYPO3 security team member Torben Hansen who fixed the issue. References • TYPO3-CORE-SA-2021-005