Denial of Service in Page Error Handling
CVE-2021-21359

5.9MEDIUM

Key Information:

Vendor

Typo3

Status
Typo3.cms
Vendor
CVE Published:
23 March 2021

What is CVE-2021-21359?

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 9.5.25, 10.4.14, 11.1.1.

Affected Version(s)

TYPO3.CMS >= 9.0.0, <= 9.5.24 <= 9.0.0, 9.5.24

TYPO3.CMS >= 10.0.0, <= 10.4.13 <= 10.0.0, 10.4.13

TYPO3.CMS >= 11.0.0, <= 11.1.0 <= 11.0.0, 11.1.0

References

https://packagist.org/packages/typo3/cms-core
x_refsource_MISC
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GH...
x_refsource_CONFIRM
https://typo3.org/security/advisory/typo3-core-sa-2021-005
x_refsource_MISC

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.