An atftp security update has been released for Arch Linux.

ASA-202101-24: atftp: denial of service

Arch Linux Security Advisory ASA-202101-24
=========================================
Severity: Medium
Date : 2021-01-12
CVE-ID : CVE-2020-6097
Package : atftp
Type : denial of service
Remote : Yes
Link :   https://security.archlinux.org/AVG-1395

Summary
======
The package atftp before version 0.7.2-3 is vulnerable to denial of
service.

Resolution
=========
Upgrade to 0.7.2-3.

# pacman -Syu "atftp>=0.7.2-3"

The problem has been fixed upstream but no release is available yet.

Workaround
=========
None.

Description
==========
An exploitable denial of service vulnerability exists in the atftpd
daemon functionality of atftp 0.7.2. A specially crafted sequence of
RRQ-Multicast requests trigger an assert() call resulting in denial-of-
service. An attacker can send a sequence of malicious packets to
trigger this vulnerability.

Impact
=====
A malicious remote user might crash the application by performing a
sequence of crafted queries.

References
=========
  https://bugs.archlinux.org/task/69175
  https://talosintelligence.com/vulnerability_reports/TALOS-2020-1029
  https://sourceforge.net/u/peterkaestle/atftp/ci/96409ef3b9ca061f9527cfaafa778105cf15d994/
  https://security.archlinux.org/CVE-2020-6097