OpenDMARC is vulnerable to denial of service. The vulnerability exists due to the ability to inject authentication results to provide false information about the domain that originated an e-mail message.
lists.fedoraproject.org/archives/list/[email protected]/message/2D4JGHMALEJEWWG56DKR5OZB22TK7W5B/
lists.fedoraproject.org/archives/list/[email protected]/message/KBOGOQOK3TIWWJV66MW5YWNRJAFFYGR5/
security-tracker.debian.org/tracker/CVE-2020-12272
sourceforge.net/p/opendmarc/tickets/237/
www.usenix.org/system/files/sec20fall_chen-jianjun_prepub_0.pdf