dovecot vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
* Ubuntu 14.04 ESM
Summary
Several security issues were fixed in Dovecot.
Software Description
* 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 ESM
dovecot-core - 1:2.2.9-1ubuntu2.6+esm3
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary
changes.
References
* USN-4456-1
* CVE-2020-12100
* CVE-2020-12673
* CVE-2020-12674
--- Mystic BBS v1.12 A45 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)