1. Ubuntu Security Notices
  2. USN-4610-1

USN-4610-1: fastd vulnerability

Publication date

29 October 2020

Overview

fastd could be made to remotely exhaust resources if it received specially crafted packets.

Releases

Packages

  • fastd - Fast and Secure Tunneling Daemon

Details

It was discovered that fastd did not properly handle receive buffers under
certain circumstances. A remote attacker could possibly use this issue to
cause a memory leak, resulting in a denial of service. (CVE-2020-27638)

It was discovered that fastd did not properly handle receive buffers under
certain circumstances. A remote attacker could possibly use this issue to
cause a memory leak, resulting in a denial of service. (CVE-2020-27638)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
20.04 focal fastd –  18-3ubuntu0.1

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›