USN-3951-1: Dovecot vulnerability
dovecot vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.04
- Ubuntu 18.10
Summary
Dovecot could be made to crash if it received specially crafted network
traffic.
Software Description
- dovecot – IMAP and POP3 email server
Details
It was discovered that the Dovecot JSON encoder incorrectly handled certain
invalid UTF-8 characters. A remote attacker could possibly use this issue
to cause Dovecot to repeatedly crash, resulting in a denial of service.
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 19.04
- dovecot-core – 1:2.3.4.1-1ubuntu2.1
- Ubuntu 18.10
- dovecot-core – 1:2.3.2.1-1ubuntu3.3
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.
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