An exploitable denial of service vulnerability exists in the atftpd daemon functionality of atftp 0.7.git20120829-3.1+b1. 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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-6097
• https://lists.debian.org/debian-lts-announce/2021/11/msg00014.html
• https://talosintelligence.com/vulnerability_reports/TALOS-2020-1029
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00058.html