The swiftmailer library in use allows to execute arbitrary shell commands if the “From” header comes from a non-trusted source and no “Return-Path” is configured. Affected are only TYPO3 installation the configuration option
$GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport']
is set to “sendmail”. Installations with the default configuration are not affected.
github.com/advisories/GHSA-45xg-4w5x-j429
github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/2014-10-22-2.yaml
github.com/TYPO3/typo3/commit/313c4bba53dd78803a9ee97c1f6f1d450a521521
github.com/TYPO3/typo3/commit/6af37574e063929eaab066dd9920b1fa8815da12
github.com/TYPO3/typo3/commit/dbdd9f22b7cebf43f2e4abdb2a6a8a9f32af8f61
github.com/TYPO3/typo3/commit/ead183c5acf25b7e1121adee5a5860bd9b5f05a2
typo3.org/security/advisory/typo3-core-sa-2014-002