Updated mailman packages has been released for Ubuntu Linux

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Ubuntu Security Notice USN-3563-1
February 08, 2018

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

- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Mailman could be made to run arbitrary code.

Software Description:
- mailman: Powerful, web-based mailing list manager

Details:

It was discovered that Mailman incorrectly handled certain web scripts.
An attacker could possibly use this to inject arbitrary code.

Update instructions:

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

Ubuntu 17.10:
  mailman 1:2.1.23-1ubuntu0.2

Ubuntu 16.04 LTS:
  mailman 1:2.1.20-1ubuntu0.3

Ubuntu 14.04 LTS:
  mailman 1:2.1.16-2ubuntu0.5

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

References:
  https://www.ubuntu.com/usn/usn-3563-1
  CVE-2018-5950

Package Information:
  https://launchpad.net/ubuntu/+source/mailman/1:2.1.23-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/mailman/1:2.1.20-1ubuntu0.3
  https://launchpad.net/ubuntu/+source/mailman/1:2.1.16-2ubuntu0.5

  Mailman Update for Ubuntu