TYPO3 Improper Neutralization of HTTP Headers for Scripting Syntax Vulnerability - CVE-2021-41114 - Vulnerability Database

TYPO3

TYPO3 Improper Neutralization of HTTP Headers for Scripting Syntax Vulnerability - CVE-2021-41114

Medium

Reference: CVE-2021-41114

NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2021-41114

Title: TYPO3 Improper Neutralization of HTTP Headers for Scripting Syntax Vulnerability

Overview:

TYPO3 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 GLOBALS39TYPO3_CONF_VARS3939SYS3939trustedHostsPattern39 (used as an effective mitigation strategy in previous TYPO3 versions) was not evaluated anymore and reintroduced the vulnerability.