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USN-3881-2: Dovecot vulnerability

5 February 2019

Dovecot could be made to expose sensitive information over the network.



  • dovecot - IMAP and POP3 email server


USN-3881-1 fixed a vulnerability in Dovecot. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

It was discovered that Dovecot 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.

Update instructions

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

Ubuntu 12.04

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


Related notices

  • USN-3881-1: dovecot-gssapi, dovecot-imapd, dovecot-submissiond, dovecot, dovecot-solr, dovecot-managesieved, dovecot-core, dovecot-dev, mail-stack-delivery, dovecot-lmtpd, dovecot-auth-lua, dovecot-pop3d, dovecot-sieve, dovecot-sqlite, dovecot-mysql, dovecot-lucene, dovecot-pgsql, dovecot-ldap