CVE-2021-41114 Details

CVE-2021-41114

Published: 2021-10-05
Last Modified: 2021-10-09
CVE Author: NIST National Vulnerability Database
CVE Assigner: security-advisories@github.com
Summary

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.

Analysis
Common Vulnerability Score System v2.0
Severity Medium
Base Score 5/10
Exploit Score 10/10
Access Vector Network
Access Complexity Low
Authentication None
Impact Score 2.9/10
Confidentiality Impact None
Availability Impact None
Integrity Impact Partial
Vector String AV:N/AC:L/Au:N/C:N/I:P/A:N
Common Vulnerability Score System v3.1
Severity Medium
Base Score 5.3/10
Exploit Score 3.9/10
Access Vector Network
Access Complexity Low
Privileges Required None
Impact Score 1.4/10
Confidentiality Impact None
Availability Impact None
Integrity Impact Low
Scope Unchanged
User Interaction None
Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Products Reported
CPE Vulnerable Start Excluding
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:* Yes 11.0.0 11.5.0
References

https://github.com/TYPO3/typo3/security/advisories/GHSA-m2jh-fxw4-gphm
https://github.com/TYPO3/typo3/commit/5cbff85506cebe343e5ae59228977547cf8e3cf4
https://typo3.org/security/advisory/typo3-core-sa-2021-015

CVE ID
CVE-2021-41114
Published
2021-10-05
Modified
2021-10-09
CVSSv2.0
Medium
CVSSv3.1
Medium
PCI Compliance
Fail
US-CERT Alert
No
CWE
CWE-20

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