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USN-3951-1: Dovecot vulnerability

23 April 2019

Dovecot could be made to crash if it received specially crafted network traffic.

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Releases

Packages

  • 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.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.04
Ubuntu 18.10

In general, a standard system update will make all the necessary changes.

References

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Further reading