Vulnerability-Lookup

FKIE_CVE-2023-6534

Vulnerability from fkie_nvd - Published: 2023-12-13 09:15 - Updated: 2026-06-17 06:50

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

In versions of FreeBSD 14.0-RELEASE before 14-RELEASE-p2, FreeBSD 13.2-RELEASE before 13.2-RELEASE-p7 and FreeBSD 12.4-RELEASE before 12.4-RELEASE-p9, the pf(4) packet filter incorrectly validates TCP sequence numbers. This could allow a malicious actor to execute a denial-of-service attack against hosts behind the firewall.

References

URL	Tags
secteam@freebsd.org	https://security.freebsd.org/advisories/FreeBSD-SA-23:17.pf.asc	Vendor Advisory
secteam@freebsd.org	https://security.netapp.com/advisory/ntap-20240112-0007/
af854a3a-2127-422b-91ae-364da2661108	https://security.freebsd.org/advisories/FreeBSD-SA-23:17.pf.asc	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security.netapp.com/advisory/ntap-20240112-0007/

Impacted products

Vendor	Product	Version
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	12.4
freebsd	freebsd	13.2
freebsd	freebsd	13.2
freebsd	freebsd	13.2
freebsd	freebsd	13.2
freebsd	freebsd	13.2
freebsd	freebsd	13.2
freebsd	freebsd	13.2
freebsd	freebsd	14.0
freebsd	freebsd	14.0
freebsd	freebsd	14.0
freebsd	freebsd	14.0
freebsd	freebsd	14.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "pf"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p2",
              "status": "affected",
              "version": "14.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "13.2-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p9",
              "status": "affected",
              "version": "12.4-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "source": "secteam@freebsd.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "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:p5:*:*:*:*:*:*",
              "matchCriteriaId": "8C950F97-40B4-43BF-BB81-C49CE00A468B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:p6:*:*:*:*:*:*",
              "matchCriteriaId": "8FFBAD22-5712-472D-ADAF-13DE0826F888",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:p7:*:*:*:*:*:*",
              "matchCriteriaId": "888336D6-CA3C-45ED-90EA-C94A3146F1E9",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "7314B63B-75AF-44EF-9F4C-DDF7A18B77E2",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "BA821886-B26B-47A6-ABC9-B8F70CE0ACFB",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "220629AD-32CC-4303-86AE-1DD27F0E4C65",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "A87EFA20-DD6B-41C5-98FD-A29F67D2E732",
              "vulnerable": true
            },
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              "matchCriteriaId": "2888B0C1-4D85-42EC-9696-03FAD0A9C28F",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "A3306F11-D3C0-41D6-BB5E-2ABDC3927715",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.2:p3:*:*:*:*:*:*",
              "matchCriteriaId": "9E584FE1-3A34-492B-B10F-508DA7CBA768",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.2:p4:*:*:*:*:*:*",
              "matchCriteriaId": "A5605E90-D125-4CC9-8B9F-F5EED9D4EE0C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.2:p5:*:*:*:*:*:*",
              "matchCriteriaId": "761B4382-E857-4868-9F80-189B7F60256B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.2:p6:*:*:*:*:*:*",
              "matchCriteriaId": "51B17801-15FD-4425-BA6C-BE06B14F1BFE",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.0:-:*:*:*:*:*:*",
              "matchCriteriaId": "FA25530A-133C-4D7C-8993-D5C42D79A0B5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.0:beta5:*:*:*:*:*:*",
              "matchCriteriaId": "DB7B021E-F4AD-44AC-96AB-8ACAF8AB1B88",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.0:p1:*:*:*:*:*:*",
              "matchCriteriaId": "69A72B5A-2189-4700-8E8B-1E5E7CA86C40",
              "vulnerable": true
            },
            {
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.0:rc4-p1:*:*:*:*:*:*",
              "matchCriteriaId": "BF309824-D379-4749-A1FA-BCB2987DD671",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In versions of FreeBSD 14.0-RELEASE before 14-RELEASE-p2, FreeBSD 13.2-RELEASE before 13.2-RELEASE-p7 and FreeBSD 12.4-RELEASE before 12.4-RELEASE-p9, the pf(4) packet filter incorrectly validates TCP sequence numbers. \u00a0This could allow a malicious actor to execute a denial-of-service attack against hosts behind the firewall."
    },
    {
      "lang": "es",
      "value": "En las versiones de FreeBSD 14.0-RELEASE anteriores a 14-RELEASE-p2, FreeBSD 13.2-RELEASE anteriores a 13.2-RELEASE-p7 y FreeBSD 12.4-RELEASE anteriores a 12.4-RELEASE-p9, el filtro de paquetes pf(4) valida incorrectamente los n\u00fameros de secuencia TCP. Esto podr\u00eda permitir que un actor malintencionado ejecute un ataque de denegaci\u00f3n de servicio contra hosts detr\u00e1s del firewall."
    }
  ],
  "id": "CVE-2023-6534",
  "lastModified": "2026-06-17T06:50:56.157",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2023-12-13T09:15:34.680",
  "references": [
    {
      "source": "secteam@freebsd.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://security.freebsd.org/advisories/FreeBSD-SA-23:17.pf.asc"
    },
    {
      "source": "secteam@freebsd.org",
      "url": "https://security.netapp.com/advisory/ntap-20240112-0007/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://security.freebsd.org/advisories/FreeBSD-SA-23:17.pf.asc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://security.netapp.com/advisory/ntap-20240112-0007/"
    }
  ],
  "sourceIdentifier": "secteam@freebsd.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2023-6534 (GCVE-0-2023-6534)

Vulnerability from cvelistv5 – Published: 2023-12-13 08:12 – Updated: 2025-02-13 17:26

Title

TCP spoofing vulnerability in pf(4)

Summary

Severity

No CVSS data available.

Assigner

freebsd mitre root

References

2 references

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory
https://security.netapp.com/advisory/ntap-2024011…

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 14.0-RELEASE , < p2 (release) Affected: 13.2-RELEASE , < p7 (release) Affected: 12.4-RELEASE , < p9 (release)

Date Public

2023-12-05 22:00

Credits

Yuxiang Yang, Ao Wang, Xuewei Feng, Qi Li and Ke Xu from Tsinghua University

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T08:35:14.417Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.freebsd.org/advisories/FreeBSD-SA-23:17.pf.asc"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20240112-0007/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "pf"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p2",
              "status": "affected",
              "version": "14.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "13.2-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p9",
              "status": "affected",
              "version": "12.4-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "user": "00000000-0000-4000-9000-000000000000",
          "value": "Yuxiang Yang, Ao Wang, Xuewei Feng, Qi Li and Ke Xu from Tsinghua University"
        }
      ],
      "datePublic": "2023-12-05T22:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "In versions of FreeBSD 14.0-RELEASE before 14-RELEASE-p2, FreeBSD 13.2-RELEASE before 13.2-RELEASE-p7 and FreeBSD 12.4-RELEASE before 12.4-RELEASE-p9, the pf(4) packet filter incorrectly validates TCP sequence numbers. \u00a0This could allow a malicious actor to execute a denial-of-service attack against hosts behind the firewall."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-12T14:06:22.880Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-23:17.pf.asc"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20240112-0007/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "TCP spoofing vulnerability in pf(4)",
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2023-6534",
    "datePublished": "2023-12-13T08:12:14.616Z",
    "dateReserved": "2023-12-05T19:03:31.535Z",
    "dateUpdated": "2025-02-13T17:26:26.737Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.