Amazon Linux AMI Security Advisory: ALAS-2020-1363
Advisory Release Date: 2020-05-14 02:28 Pacific
In Dovecot before 188.8.131.52 and 2.3.x before 184.108.40.206, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components. (CVE-2019-7524 )
It was discovered that Dovecot before versions 220.127.116.11 and 18.104.22.168 incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users. (CVE-2019-3814 )
Run yum update dovecot to update your system.