TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 8.7.40, 9.5.25, 10.4.14, 11.1.1, due to the lack of ensuring file extensions belong to configured allowed mime-types, attackers can upload arbitrary data with arbitrary file extensions - however, default _fileDenyPattern_ successfully blocked files like _.htaccess_ or _malicious.php_. Besides that, _UploadedFileReferenceConverter_ transforming uploaded files into proper FileReference domain model objects handles possible file uploads for other extensions as well - given those extensions use the Extbase MVC framework, make use of FileReference items in their direct or inherited domain model definitions and did not implement their own type converter. In case this scenario applies, _UploadedFileReferenceConverter_ accepts any file mime-type and persists files in the default location. In any way, uploaded files are placed in the default location _/fileadmin/user_upload/_, in most scenarios keeping the submitted filename - which allows attackers to directly reference files, or even correctly guess filenames used by other individuals, disclosing this information. No authentication is required to exploit this vulnerability. This is fixed in versions 8.7.40, 9.5.25, 10.4.14, 11.1.1.
References
Link | Resource |
---|---|
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2r6j-862c-m2v2 | Third Party Advisory |
https://packagist.org/packages/typo3/cms-form | Release Notes Third Party Advisory |
https://typo3.org/security/advisory/typo3-core-sa-2021-002 | Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2021-03-23T01:50:29
Updated: 2021-03-23T01:50:29
Reserved: 2020-12-22T00:00:00
Link: CVE-2021-21355
JSON object: View
NVD Information
Status : Analyzed
Published: 2021-03-23T02:15:12.627
Modified: 2021-03-26T18:47:32.113
Link: CVE-2021-21355
JSON object: View
Redhat Information
No data.