FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

typo3 -- multiple vulnerabilities

Affected packages
typo3-9-php72 < 9.5.20
typo3-9-php73 < 9.5.20
typo3-9-php74 < 9.5.20
typo3-10-php72 < 10.4.6
typo3-10-php73 < 10.4.6
typo3-10-php74 < 10.4.6


VuXML ID eab964f8-d632-11ea-9172-4c72b94353b5
Discovery 2020-07-28
Entry 2020-08-04

Typo3 Team reports:

In case 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 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.

It has been discovered that an internal verification mechanism can be used to generate arbitrary checksums. This allows to inject arbitrary data having a valid cryptographic message authentication code (HMAC-SHA1) and can lead to various attack chains as described below.


CVE Name CVE-2020-15098
CVE Name CVE-2020-15099