Cryptographic Issues Affecting typo3/cms package, versions >=9.0.0, <9.5.20 >=10.0.0, <10.4.6
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Test your applications- Snyk ID SNYK-PHP-TYPO3CMS-596487
- published 30 Jul 2020
- disclosed 30 Jul 2020
- credit Unknown
Introduced: 30 Jul 2020
CVE-2020-15099 Open this link in a new tabHow to fix?
Upgrade typo3/cms to version 9.5.20, 10.4.6 or higher.
Overview
typo3/cms is a free open source Content Management Framework.
Affected versions of this package are vulnerable to Cryptographic Issues. In a case where an attacker manages to generate a valid cryptographic message authentication code (HMAC-SHA1) - either by using a different existing vulnerability or in case the internal encryptionKey was exposed - it is possible to retrieve arbitrary files of a TYPO3 installation. This includes the possibility to fetch typo3conf/LocalConfiguration.php, which again contains the encryptionKey as well as credentials of the database management system being used.In case a database server is directly accessible either via internet or in a shared hosting network, this allows the ability to completely retrieve, manipulate or delete database contents. This includes creating an administration user account - which can be used to trigger remote code execution by injecting custom extensions.