- Component Type: TYPO3 CMS
- Subcomponent: Core (ext:core)
- Release Date: May 12, 2020
- Vulnerability Type: Insecure Deserialization
- Affected Versions: 9.0.0-9.5.16, 10.0.0-10.4.1
- Severity: High
- Suggested CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H/E:F/RL:O/RC:C
- References: CVE-2020-11066, CWE-502
Problem Description
Calling unserialize() on malicious user-submitted content can result in the following scenarios:
- trigger deletion of arbitrary directory in file system (if writable for web server)
- trigger message submission via email using identity of web site (mail relay)
Another insecure deserialization vulnerability is required to actually exploit mentioned aspects.
Solution
Update to TYPO3 versions 9.5.17 or 10.4.2 that fix the problem described.
Credits
Thanks to TYPO3 security team member Oliver Hader who reported and fixed the issue.
General Advice
Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.
General Note
All security related code changes are tagged so that you can easily look them up in our review system.