USN-4110-3: Dovecot regression

28 August 2019

USN-4110-1 introduced a regression in Dovecot.

Releases

Packages

  • dovecot - IMAP and POP3 email server

Details

USN-4110-1 fixed a vulnerability in Dovecot. The update introduced a
regression causing a wrong check. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly
handled certain data. An attacker could possibly use this issue
to cause a denial of service or execute arbitrary code.

Update instructions

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

Ubuntu 19.04
Ubuntu 18.04
Ubuntu 16.04

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

References

Related notices

  • USN-4110-1: dovecot-lmtpd, dovecot-managesieved, dovecot-solr, dovecot-pgsql, dovecot-sieve, dovecot-auth-lua, dovecot, dovecot-mysql, dovecot-sqlite, mail-stack-delivery, dovecot-core, dovecot-gssapi, dovecot-submissiond, dovecot-pop3d, dovecot-dev, dovecot-lucene, dovecot-imapd, dovecot-ldap
  • USN-4110-2: dovecot-lmtpd, dovecot-managesieved, dovecot-common, dovecot-pgsql, dovecot-sieve, dovecot-solr, dovecot-postfix, dovecot, dovecot-mysql, dovecot-sqlite, mail-stack-delivery, dovecot-core, dovecot-gssapi, dovecot-pop3d, dovecot-dev, dovecot-imapd, dovecot-ldap
  • USN-4110-4: dovecot-lmtpd, dovecot-managesieved, dovecot-common, dovecot-pgsql, dovecot-sieve, dovecot-solr, dovecot-postfix, dovecot, dovecot-mysql, dovecot-sqlite, mail-stack-delivery, dovecot-core, dovecot-gssapi, dovecot-pop3d, dovecot-dev, dovecot-imapd, dovecot-ldap