CVE-2020-15086 – Potential Remote Code Execution in TYPO3 with mediace extension

https://notcve.org/view.php?id=CVE-2020-15086

In TYPO3 installations with the "mediace" extension from version 7.6.2 and before version 7.6.5, it has been discovered that an internal verification mechanism can be used to generate arbitrary checksums. The allows to inject arbitrary data having a valid cryptographic message authentication code and can lead to remote code execution. To successfully exploit this vulnerability, an attacker must have access to at least one `Extbase` plugin or module action in a TYPO3 installation. This is fixed in version 7.6.5 of the "mediace" extension for TYPO3. En las instalaciones de TYPO3 con la extensión "mediace" desde la versión 7.6.2 y anteriores a la versión 7.6.5, se ha detectado que se puede utilizar un mecanismo de verificación interna para generar sumas de comprobación arbitrarias. • https://github.com/FriendsOfTYPO3/mediace/commit/fa29ffd3e8b275782a8600d2406e1b1e5e16ae75 https://github.com/FriendsOfTYPO3/mediace/pull/31 https://github.com/FriendsOfTYPO3/mediace/security/advisories/GHSA-4h44-w6fm-548g • CWE-20: Improper Input Validation CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-325: Missing Cryptographic Step CWE-502: Deserialization of Untrusted Data •