A libslirp security update has been released for Ubuntu Linux 20.04 LTS.

USN-4437-1: libslirp vulnerability

==========================================================================
Ubuntu Security Notice USN-4437-1
July 27, 2020

libslirp vulnerability
==========================================================================

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

- Ubuntu 20.04 LTS

Summary:

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

Software Description:
- libslirp: None

Details:

Ziming Zhang and VictorV discovered that libslirp incorrectly handled
replying to certain ICMP echo requests. A remote attacker could possibly
use this issue to cause libslirp to crash, resulting in a denial of
service.

Update instructions:

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

Ubuntu 20.04 LTS:
libslirp0 4.1.0-2ubuntu2.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://usn.ubuntu.com/4437-1
CVE-2020-10756

Package Information:
  https://launchpad.net/ubuntu/+source/libslirp/4.1.0-2ubuntu2.1