Per RFC 1413, The unique identifying tuple includes not only the ports, but also the both addresses. Without the addresses, the information becomes both non-unique and public:
To prevent this from happening, disable identd or upgrade to a non vulnerable version.
{
"cwe_ids": [],
"github_reviewed": true,
"github_reviewed_at": "2024-05-09T21:31:35Z",
"nvd_published_at": null,
"severity": "LOW"
}