CVE-1999-1109

Summary

CVE-1999-1109 is a denial-of-service vulnerability affecting Sendmail before version 8.10.0. An attacker can cause the server to become unresponsive by sending a sequence of ETRN commands, which are used to retrieves mail from an external mail server. After sending the commands, the attacker disconnects from the server, leaving Sendmail to continue processing the invalid commands, resulting in a denial-of-service condition.

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