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USN-3258-1: Dovecot vulnerability

10 April 2017

Dovecot could be made to crash if it received specially crafted input.



  • dovecot - IMAP and POP3 email server


It was discovered that Dovecot incorrectly handled some usernames. An attacker
could possibly use this issue to cause Dovecot to hang or crash, resulting in a
denial of service.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.10
Ubuntu 16.04

In general, a standard system update will make all the necessary changes.


Related notices

  • USN-3258-2: dovecot-core, dovecot-lucene, dovecot-imapd, dovecot-pgsql, dovecot-ldap, dovecot-solr, dovecot, dovecot-pop3d, dovecot-managesieved, dovecot-mysql, mail-stack-delivery, dovecot-sieve, dovecot-gssapi, dovecot-lmtpd, dovecot-sqlite, dovecot-dev