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Sendmail < 8.10.1 ETRN Command Remote DoS

High

Synopsis

The remote host is vulnerable to a Denial of Service (DoS) attack.

Description

The remote SMTP server has a flaw that may allow remote attackers to cause a denial of service by sending a series of ETRN commands and then disconnecting from this server.

Solution

Upgrade to Sendmail 8.10.1 or higher.