USN-4456-2: Dovecot vulnerabilities
17 August 2020
Several security issues were fixed in Dovecot.
Releases
Packages
- dovecot - IMAP and POP3 email server
Details
USN-4456-1 fixed several vulnerabilities in Dovecot. This update provides
the corresponding update for Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that Dovecot incorrectly handled deeply nested MIME
parts. A remote attacker could possibly use this issue to cause Dovecot to
consume resources, resulting in a denial of service. (CVE-2020-12100)
It was discovered that Dovecot incorrectly handled memory when using NTLM.
A remote attacker could possibly use this issue to cause Dovecot to crash,
resulting in a denial of service. (CVE-2020-12673)
It was discovered that the Dovecot RPA mechanism incorrectly handled
zero-length messages. A remote attacker could possibly use this issue to
cause Dovecot to crash, resulting in a denial of service. (CVE-2020-12674)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 14.04
In general, a standard system update will make all the necessary changes.
References
Related notices
- USN-4456-1: dovecot-lucene, dovecot-sieve, dovecot-solr, dovecot-pgsql, dovecot-gssapi, dovecot, dovecot-managesieved, dovecot-pop3d, dovecot-imapd, dovecot-sqlite, dovecot-core, dovecot-ldap, dovecot-mysql, mail-stack-delivery, dovecot-dev, dovecot-submissiond, dovecot-lmtpd, dovecot-auth-lua