7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.002 Low
EPSS
Percentile
54.5%
> ### 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
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.
Update to TYPO3 versions 9.5.25, 10.4.14, 11.1.1 that fix the problem described.
Thanks to Paul Keller, Mathias Bolt Lesniak and Kay Strobach who reported this issue and to TYPO3 framework merger Frank NΓ€gler and to TYPO3 security team member Torben Hansen who fixed the issue.
CPE | Name | Operator | Version |
---|---|---|---|
typo3/cms | lt | 9.5.25 | |
typo3/cms | lt | 11.1.1 | |
typo3/cms | lt | 10.4.14 | |
typo3/cms-core | lt | 9.5.25 | |
typo3/cms-core | lt | 11.1.1 | |
typo3/cms-core | lt | 10.4.14 |
github.com/advisories/GHSA-4p9g-qgx9-397p
github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21359.yaml
github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21359.yaml
github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4p9g-qgx9-397p
nvd.nist.gov/vuln/detail/CVE-2021-21359
packagist.org/packages/typo3/cms-core
typo3.org/security/advisory/typo3-core-sa-2021-005
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.002 Low
EPSS
Percentile
54.5%