Ubuntu alert USN-4718-1 (fastd)

From:
             
 
"Leonidas S. Barbosa" <leo.barbosa@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-4718-1] fastd vulnerability
Date:
             
 
Tue, 02 Feb 2021 12:24:48 -0300
Message-ID:
             
 
<20210202152448.GA2850219@d4rkl41n>
==========================================================================
Ubuntu Security Notice USN-4718-1
February 02, 2021

fastd vulnerability
==========================================================================

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

- Ubuntu 20.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

fastd could be made to denial of service it if received a specially crafted input.

Software Description:
- fastd: Fast and Secure Tunneling Daemon

Details:

It was discovered that fastd incorrectly handled certain packets.
An attacker could possibly use this issue to cause a denial of service.

Update instructions:

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

Ubuntu 20.10:
  fastd                           19-3ubuntu0.1

Ubuntu 18.04 LTS:
  fastd                           18-3ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  fastd                           17-4ubuntu0.1

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

References:
  https://usn.ubuntu.com/4718-1
  CVE-2020-27638

Package Information:
  https://launchpad.net/ubuntu/+source/fastd/19-3ubuntu0.1
  https://launchpad.net/ubuntu/+source/fastd/18-3ubuntu0.18...
  https://launchpad.net/ubuntu/+source/fastd/17-4ubuntu0.1
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