==========================================================================
Ubuntu Security Notice USN-4517-1
September 17, 2020

libemail-address-list-perl vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Email-Address-List could be made to remotely exhaust resources if it
received specially crafted email data.

Software Description:
- libemail-address-list-perl: RFC close address list parsing

Details:

It was discovered that Email-Address-List does not properly parse email
addresses during email-ingestion. A remote attacker could use this issue
to cause an algorithmic complexity attack, resulting in a denial of
service. (CVE-2018-18898)

Update instructions:

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

Ubuntu 18.04 LTS:
  libemail-address-list-perl      0.05-1+deb9u1build0.18.04.1

Ubuntu 16.04 LTS:
  libemail-address-list-perl      0.05-1+deb9u1build0.16.04.1

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

References:
  https://usn.ubuntu.com/4517-1
  CVE-2018-18898

Package Information:

https://launchpad.net/ubuntu/+source/libemail-address-list-perl/0.05-1+deb9u1build0.18.04.1

https://launchpad.net/ubuntu/+source/libemail-address-list-perl/0.05-1+deb9u1build0.16.04.1