USN-3951-1: Dovecot vulnerability

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-core1:2.3.4.1-1ubuntu2.1
Ubuntu 18.10
dovecot-core1:2.3.2.1-1ubuntu3.3

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.

References

Source: USN-3951-1: Dovecot vulnerability

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