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Denial of Service in Page Error Handling

Moderate severity GitHub Reviewed Published Mar 16, 2021 in TYPO3/typo3 • Updated Feb 7, 2024

Package

composer typo3/cms (Composer)

Affected versions

>= 10.0.0, < 10.4.14
>= 11.0.0, < 11.1.1
>= 9.0.0, < 9.5.25

Patched versions

10.4.14
11.1.1
9.5.25
composer typo3/cms-core (Composer)
>= 10.0.0, < 10.4.14
>= 11.0.0, < 11.1.1
>= 9.0.0, < 9.5.25
10.4.14
11.1.1
9.5.25

Description

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

References

@ohader ohader published to TYPO3/typo3 Mar 16, 2021
Reviewed Mar 23, 2021
Published to the GitHub Advisory Database Mar 23, 2021
Published by the National Vulnerability Database Mar 23, 2021
Last updated Feb 7, 2024

Severity

Moderate
5.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
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

CVE ID

CVE-2021-21359

GHSA ID

GHSA-4p9g-qgx9-397p

Source code

No known source code

Credits

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