CVE-2020-7451 (GCVE-0-2020-7451)

Vulnerability from cvelistv5 – Published: 2020-04-28 19:11 – Updated: 2024-08-04 09:25
VLAI
Summary
In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosing one byte of kernel memory over the network.
CWE
  • Improper initialization
Assigner
freebsd CNA under the mitre root
CNA scorecard D 60/100 over 61 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
n/a FreeBSD Affected: 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, 11.3-RELEASE before 11.3-RELEASE-p7
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T09:25:48.993Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "FreeBSD",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, 11.3-RELEASE before 11.3-RELEASE-p7"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosing one byte of kernel memory over the network."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Improper initialization",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-04-28T19:11:42.000Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "secteam@freebsd.org",
          "ID": "CVE-2020-7451",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "FreeBSD",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, 11.3-RELEASE before 11.3-RELEASE-p7"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosing one byte of kernel memory over the network."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Improper initialization"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc",
              "refsource": "CONFIRM",
              "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2020-7451",
    "datePublished": "2020-04-28T19:11:42.000Z",
    "dateReserved": "2020-01-21T00:00:00.000Z",
    "dateUpdated": "2024-08-04T09:25:48.993Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2020-7451",
      "date": "2026-10-31",
      "epss": "0.01169",
      "percentile": "0.67403"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*",
                    "matchCriteriaId": "F35957CE-AF9F-40CA-BDD1-FA6A0E73783F",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p1:*:*:*:*:*:*",
                    "matchCriteriaId": "EA929713-B797-494A-853D-C121D9D69519",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p2:*:*:*:*:*:*",
                    "matchCriteriaId": "3C3D8EDC-91D3-45B2-AC1D-EF4346D4A714",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p3:*:*:*:*:*:*",
                    "matchCriteriaId": "EA5006FF-06A5-4D95-BF5B-29F26248D11F",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p4:*:*:*:*:*:*",
                    "matchCriteriaId": "A705031B-FD63-4076-B92E-E826E11D7111",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p5:*:*:*:*:*:*",
                    "matchCriteriaId": "11C1EFB1-68E5-45F4-A7E1-744574F290D1",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p6:*:*:*:*:*:*",
                    "matchCriteriaId": "25F649A7-9265-4552-8934-BCE083363982",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:-:*:*:*:*:*:*",
                    "matchCriteriaId": "BD730B6A-F123-4685-ACB3-4F20AAAB77F3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p1:*:*:*:*:*:*",
                    "matchCriteriaId": "508150E3-2C0C-4EEB-BFC9-BB5CEB404C06",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p2:*:*:*:*:*:*",
                    "matchCriteriaId": "B5D692EF-A5D7-430E-91BA-4CD137343B66",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosing one byte of kernel memory over the network."
          },
          {
            "lang": "es",
            "value": "En FreeBSD versiones 12.1-2.1-STABLE anteriores a r358739, versiones 12.1-RELEASE anteriores a 12.1-RELEASE-p3, versiones 11.3-STABLE anteriores a r358740, y versiones 11.3-RELEASE anteriores a 11.3-RELEASE-p7, un segmento de TCP SYN-ACK o de desaf\u00edo TCP-ACK sobre IPv6 que es transmitido o retransmitido no inicializa apropiadamente el campo Traffic Class que revela un byte de memoria del kernel por medio de la red."
          }
        ],
        "id": "CVE-2020-7451",
        "lastModified": "2024-11-21T05:37:10.280",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 5.0,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 1.4,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2020-04-28T20:15:12.797",
        "references": [
          {
            "source": "secteam@freebsd.org",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc"
          }
        ],
        "sourceIdentifier": "secteam@freebsd.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-908"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
Events included in the timeline

Loading timeline…


    Loading…

    Loading…

    Loading…

    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.