{
  "id": "CVE-2023-4809",
  "sourceIdentifier": "secteam@freebsd.org",
  "published": "2023-09-06T20:15:08.080",
  "lastModified": "2023-09-12T15:50:18.057",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "In pf packet processing with a 'scrub fragment reassemble' rule, a packet containing multiple IPv6 fragment headers would be reassembled, and then immediately processed.  That is, a packet with multiple fragment extension headers would not be recognized as the correct ultimate payload. Instead a packet with multiple IPv6 fragment headers would unexpectedly be interpreted as a fragmented packet, rather than as whatever the real payload is.\n\n\n\n\nAs a result, IPv6 fragments may bypass pf firewall rules written on the assumption all fragments have been reassembled and, as a result, be forwarded or processed by the host.\n\n"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    },
    {
      "source": "secteam@freebsd.org",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-167"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "12.4",
              "matchCriteriaId": "A7F6C8B0-9D75-476C-ADBA-754416FBC186"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "13.0",
              "versionEndExcluding": "13.2",
              "matchCriteriaId": "BA49E374-9F1A-4F62-B88D-CD36EDEA6060"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:-:*:*:*:*:*:*",
              "matchCriteriaId": "24920B4D-96C0-401F-B679-BEB086760EAF"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:p1:*:*:*:*:*:*",
              "matchCriteriaId": "3CE32730-A9F5-4E8D-BDA4-6B8232F84787"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:p2:*:*:*:*:*:*",
              "matchCriteriaId": "552E81DE-D409-475F-8ED0-E10A0BE43D29"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:p3:*:*:*:*:*:*",
              "matchCriteriaId": "251CAE22-C3E6-45AD-8301-F36BEE5C6860"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:p4:*:*:*:*:*:*",
              "matchCriteriaId": "85D94BCA-FA32-4C10-95CD-5D2A69B38A7A"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:rc2-p1:*:*:*:*:*:*",
              "matchCriteriaId": "BA821886-B26B-47A6-ABC9-B8F70CE0ACFB"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:rc2-p2:*:*:*:*:*:*",
              "matchCriteriaId": "220629AD-32CC-4303-86AE-1DD27F0E4C65"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:*",
              "matchCriteriaId": "A87EFA20-DD6B-41C5-98FD-A29F67D2E732"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.2:p1:*:*:*:*:*:*",
              "matchCriteriaId": "2888B0C1-4D85-42EC-9696-03FAD0A9C28F"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.2:p2:*:*:*:*:*:*",
              "matchCriteriaId": "A3306F11-D3C0-41D6-BB5E-2ABDC3927715"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/08/5",
      "source": "secteam@freebsd.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/08/6",
      "source": "secteam@freebsd.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2023/09/08/7",
      "source": "secteam@freebsd.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:10.pf.asc",
      "source": "secteam@freebsd.org",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}