CVE-2021-3773

NameCVE-2021-3773
DescriptionA flaw in netfilter could allow a network-connected attacker to infer openvpn connection endpoint information for further use in traditional network attacks.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Notes

https://www.openwall.com/lists/oss-security/2021/09/08/3
https://breakpointingbad.com/2021/09/08/Port-Shadows-via-Network-Alchemy.html
https://bugzilla.suse.com/show_bug.cgi?id=1189897
No code changes necessary/needed, firewall rules are reponsibility of local admin

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