1. Ubuntu Security Notices
  2. USN-4540-1

USN-4540-1: atftpd vulnerabilities

Publication date

24 September 2020

Overview

Several security issues were fixed in atftpd.

Releases

Packages

  • atftp - Advanced TFTP Server and Client

Details

Denis Andzakovic discovered that atftpd incorrectly handled certain
malformed packets. A remote attacker could send a specially crafted packet
to cause atftpd to crash, resulting in a denial of service.
(CVE-2019-11365)

Denis Andzakovic discovered that atftpd did not properly lock the thread
list mutex. An attacker could send a large number of tftpd packets
simultaneously when running atftpd in daemon mode to cause atftpd to
crash, resulting in a denial of service. (CVE-2019-11366)

Denis Andzakovic discovered that atftpd incorrectly handled certain
malformed packets. A remote attacker could send a specially crafted packet
to cause atftpd to crash, resulting in a denial of service.
(CVE-2019-11365)

Denis Andzakovic discovered that atftpd did not properly lock the thread
list mutex. An attacker could send a large number of tftpd packets
simultaneously when running atftpd in daemon mode to cause atftpd to
crash, resulting in a denial of service. (CVE-2019-11366)

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
18.04 bionic atftpd –  0.7.git20120829-3.1~0.18.04.1

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 ›