{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.6.4"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "fdfcc63a5715b524ab1809fa67e9b939b5510325"
            }
          ],
          "repo": "https://github.com/butok/fnet",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "An issue was discovered in FNET through 4.6.4. The code for processing the hop-by-hop header (in the IPv6 extension headers) doesn't check for a valid length of an extension header, and therefore an out-of-bounds read can occur in _fnet_ip6_ext_header_handler_options in fnet_ip6.c, leading to Denial-of-Service.",
  "id": "CVE-2020-17468",
  "modified": "2026-04-01T23:07:57.976355385Z",
  "published": "2020-12-11T23:15:13.620Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://fnet.sourceforge.net/manual/fnet_history.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.kb.cert.org/vuls/id/815128"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}