CVE-2021-41114: Typo3/cms core HTTP Host Header Injection Vulnerability
MODERATECVE-2021-41114 is a MODERATE (CVSS 4.8) http host header injection vulnerability (CWE-20: Improper Input Validation) affecting Typo3/cms core libraries in the Packagist ecosystem. The issue involves http host header injection. Remediation is available by upgrading affected packages to version 11.5.0.
CVE-2021-41114 at a Glance
Security Impact
CVSS: 4.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L).
How to Fix CVE-2021-41114
To remediate this vulnerability, upgrade all affected Typo3/cms core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade typo3/cms-core to 11.5.0Upgrade typo3/cms to 11.5.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for typo3/cms-coreHow to Check if You Are Affected
To determine whether your application is affected by CVE-2021-41114, inspect your project dependencies for Typo3/cms core:
inspect dependencies for typo3/cms-coreAnalyze the terminal output to locate any version of Typo3/cms core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 11.5.0), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Typo3/cms core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2021-41114 Affected Typo3/cms core Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
typo3/cms-core
|
Packagist |
≥ 11.0.0
< 11.5.0
|
11.5.0
|
|
typo3/cms
|
Packagist |
≥ 11.0.0
< 11.5.0
|
11.5.0
|
References
Frequently Asked Questions
What is CVE-2021-41114?
Which Typo3/cms core versions are affected?
What version fixes CVE-2021-41114?
Is typo3/cms-core affected?
Is typo3/cms affected?
What is the CVSS score of CVE-2021-41114?
What CWE is associated with CVE-2021-41114?
How can I check Packagist dependencies for CVE-2021-41114?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-m2jh-fxw4-gphm",
"modified" : "2021-10-05T18:47:01Z",
"published" : "2021-10-05T20:23:35Z",
"aliases" : [ "CVE-2021-41114" ],
"summary" : "HTTP Host Header Injection",
"details" : "### Meta\n* CVSS: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:F/RL:O/RC:C` (3.5)\n\n### Problem\nIt 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.\n\nThis vulnerability is the same as described in [TYPO3-CORE-SA-2014-001 (CVE-2014-3941)](https://typo3.org/security/advisory/typo3-core-sa-2014-001/). 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.\n\n### Solution\nUpdate your instance to TYPO3 version 11.5.0 which addresses the problem described.\n\n### Credits\nThanks to TYPO3 framework merger Benjamin Franzke who reported and fixed the issue.\n\n### References\n* [TYPO3-CORE-SA-2021-015](https://typo3.org/security/advisory/typo3-core-sa-2021-015)\n* [CVE-2014-3941](https://nvd.nist.gov/vuln/detail/CVE-2014-3941) reintroduced in TYPO3 v11.0.0",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "11.0.0"
}, {
"fixed" : "11.5.0"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "11.0.0"
}, {
"fixed" : "11.5.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/security/advisories/GHSA-m2jh-fxw4-gphm"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2014-3941"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-41114"
}, {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/commit/5cbff85506cebe343e5ae59228977547cf8e3cf4"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-41114.yaml"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-41114.yaml"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/TYPO3/typo3"
}, {
"type" : "WEB",
"url" : "https://typo3.org/security/advisory/typo3-core-sa-2021-015"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-20", "CWE-644" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2021-10-05T18:47:01Z",
"nvd_published_at" : "2021-10-05T18:15:00Z"
}
}