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Ubuntu Security Notice USN-4405-1
June 29, 2020

glib-networking vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Fraudulent security certificates could allow sensitive
information to be exposed when accessing the Internet.

Software Description:
- glib-networking: Network extensions for GLib

Details:

It was discovered that glib-networking skipped hostname certificate
verification if the application failed to specify the server
identity. A remote attacker could use this to perform a
person-in-the-middle attack and expose sensitive information.

Update instructions:

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

Ubuntu 20.04 LTS:
  glib-networking                 2.64.2-1ubuntu0.1

Ubuntu 19.10:
  glib-networking                 2.62.1-1ubuntu0.1

Ubuntu 18.04 LTS:
  glib-networking                 2.56.0-1ubuntu0.1

Ubuntu 16.04 LTS:
  glib-networking                 2.48.2-1~ubuntu16.04.2

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

References:
  https://usn.ubuntu.com/4405-1
  CVE-2020-13645

Package Information:
  https://launchpad.net/ubuntu/+source/glib-networking/2.64.2-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/glib-networking/2.62.1-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/glib-networking/2.56.0-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/glib-networking/2.48.2-1~ubuntu16.04.2