CVE-2021-41114

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Summary

CVECVE-2021-41114
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-10-05 18:15:00 UTC
Updated2021-10-09 02:51:00 UTC
DescriptionTYPO3 is an open source PHP based web content management system released under the GNU GPL. It has been discovered that TYPO3 CMS is susceptible to host spoofing due to improper validation of the HTTP Host header. TYPO3 uses the HTTP Host header, for example, to generate absolute URLs during the frontend rendering process. Since the host header itself is provided by the client, it can be forged to any value, even in a name-based virtual hosts environment. This vulnerability is the same as described in TYPO3-CORE-SA-2014-001 (CVE-2014-3941). A regression, introduced during TYPO3 v11 development, led to this situation. The already existing setting $GLOBALS['TYPO3_CONF_VARS']['SYS']['trustedHostsPattern'] (used as an effective mitigation strategy in previous TYPO3 versions) was not evaluated anymore, and reintroduced the vulnerability.

Risk And Classification

Problem Types: CWE-20 | CWE-644

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Typo3 Typo3 All All All All

References

ReferenceSourceLinkTags
[SECURITY] Verify HTTP_HOST via FE/BE middleware · TYPO3/typo3@5cbff85 · GitHub MISC github.com
HTTP Host Header Injection in Request Handling · Advisory · TYPO3/typo3 · GitHub CONFIRM github.com
TYPO3-CORE-SA-2021-015: HTTP Host Header Injection in Request Handling MISC typo3.org
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