CVE-2021-41114 HTTP Host Header Injection in Request Handling in Typo3
Attackers can spoof the HTTP Host header to manipulate generated URLs, bypassing security controls in TYPO3 CMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-41114?
CVE-2021-41114 is a medium-severity vulnerability in Typo3 Typo3, published on 5 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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 $GLOBALS['TYPO3_CONF_VARS']['SYS']['trustedHostsPattern'] (used as an effective mitigation strategy in previous TYPO3 versions) was not evaluated anymore, and reintroduced the vulnerability.
Which versions are affected by CVE-2021-41114?
5 open source packages ship an affected version, including typo3/cms, typo3 and typo3/cms-core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
typo3/cms Packagist | From 11.0.0 | 11.5.0 |
typo3/cms Packagist | From 11.0.0 | 11.5.0 |
typo3 Bitnami | From 11.0.0 | 11.5.0 |
typo3/cms-core Packagist | From 11.0.0 | 11.5.0 |
typo3/cms-core Packagist | From 11.0.0 | 11.5.0 |
Products include Typo3 Typo3.
How do I fix CVE-2021-41114?
Upgrade typo3/cms to 11.5.0 or later.
Is CVE-2021-41114 being exploited?
There is no known exploitation of CVE-2021-41114 in the wild and no public exploit code.
Other vulnerabilities in Typo3 Typo3
- CVE-2009-0258 Indexed Search Engine for TYPO3 Command Execution via Metacharacter Injection
- CVE-2011-3583 Typo3 SQL injection due to faulty prepared statements
- CVE-2011-4628 Typo3 Authentication Bypass
- CVE-2023-24814 Persisted Cross-Site Scripting in Frontend Rendering in typo3
- CVE-2021-41113 Cross-Site-Request-Forgery in Backend URI Handling in Typo3
Sources
Also known as BIT-typo3-2021-41114, GHSA-m2jh-fxw4-gphm.