USN-4674-1: Dovecot vulnerabilities
4 January 2021
Several security issues were fixed in Dovecot.
- dovecot - IMAP and POP3 email server
It was discovered that Dovecot incorrectly handled certain imap hibernation
commands. A remote authenticated attacker could possibly use this issue to
access other users' email. This issue only affected Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, and Ubuntu 20.10. (CVE-2020-24386)
Innokentii Sennovskiy discovered that Dovecot incorrectly handled MIME
parsing. A remote attacker could possibly use this issue to cause Dovecot
to crash, resulting in a denial of service. (CVE-2020-25275)
The problem can be corrected by updating your system to the following package versions:
In general, a standard system update will make all the necessary changes.
- USN-4674-2: dovecot-lmtpd, dovecot-managesieved, dovecot-sieve, dovecot-ldap, dovecot-mysql, dovecot-sqlite, dovecot-pgsql, dovecot-dev, dovecot-core, dovecot-gssapi, dovecot-solr, mail-stack-delivery, dovecot-imapd, dovecot-pop3d, dovecot