GHSA-4p9g-qgx9-397p
Denial of Service in Page Error Handling
Quick fix
GHSA-4p9g-qgx9-397p — typo3/cms-core: upgrade to the fixed version with the command below.
composer require typo3/cms-core:^10.4.14Details
> ### 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](https://typo3.org/security/advisory/typo3-core-sa-2021-005)
Are you affected?
Enter the version of the package you're using.
Affected packages
10.0.0Fixed in: 10.4.14composer require typo3/cms-core:^10.4.1411.0.0Fixed in: 11.1.1composer require typo3/cms-core:^11.1.19.0.0Fixed in: 9.5.25composer require typo3/cms-core:^9.5.25References
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4p9g-qgx9-397p[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2021-21359[ADVISORY]
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21359.yaml[WEB]
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21359.yaml[WEB]
- https://packagist.org/packages/typo3/cms-core[WEB]
- https://typo3.org/security/advisory/typo3-core-sa-2021-005[WEB]