CVE-2021-44549 – SMTPS server hostname not checked when making TLS connection to SMTPS server

https://notcve.org/view.php?id=CVE-2021-44549

Apache Sling Commons Messaging Mail provides a simple layer on top of JavaMail/Jakarta Mail for OSGi to send mails via SMTPS. To reduce the risk of "man in the middle" attacks additional server identity checks must be performed when accessing mail servers. For compatibility reasons these additional checks are disabled by default in JavaMail/Jakarta Mail. The SimpleMailService in Apache Sling Commons Messaging Mail 1.0 lacks an option to enable these checks for the shared mail session. A user could enable these checks nevertheless by accessing the session via the message created by SimpleMessageBuilder and setting the property mail.smtps.ssl.checkserveridentity to true. • https://lists.apache.org/thread/l8p9h2bqvkj6rhv4w8kzctb817415b7f https://access.redhat.com/security/cve/CVE-2021-44549 https://bugzilla.redhat.com/show_bug.cgi?id=2315808 • CWE-295: Improper Certificate Validation •