CVE-2019-8460 (GCVE-0-2019-8460)

Vulnerability from cvelistv5 – Published: 2019-08-26 19:18 – Updated: 2024-08-04 21:17
VLAI
Summary
OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
checkpoint CNA under the mitre root
CNA scorecard C 66/100 over 17 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
n/a OpenBSD Affected: All, including latest - 6.5
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T21:17:31.425Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20190905-0001/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "OpenBSD",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "All, including latest - 6.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenBSD kernel version \u003c= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1049",
              "description": "CWE-1049",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-08-02T16:16:54.000Z",
        "orgId": "897c38be-0345-43cd-b6cf-fe179e0c4f45",
        "shortName": "checkpoint"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20190905-0001/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@checkpoint.com",
          "ID": "CVE-2019-8460",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "OpenBSD",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "All, including latest - 6.5"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "OpenBSD kernel version \u003c= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-1049"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f",
              "refsource": "MISC",
              "url": "https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f"
            },
            {
              "name": "https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig",
              "refsource": "MISC",
              "url": "https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20190905-0001/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20190905-0001/"
            },
            {
              "name": "https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/",
              "refsource": "MISC",
              "url": "https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/"
            },
            {
              "name": "https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03",
              "refsource": "MISC",
              "url": "https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "897c38be-0345-43cd-b6cf-fe179e0c4f45",
    "assignerShortName": "checkpoint",
    "cveId": "CVE-2019-8460",
    "datePublished": "2019-08-26T19:18:49.000Z",
    "dateReserved": "2019-02-18T00:00:00.000Z",
    "dateUpdated": "2024-08-04T21:17:31.425Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2019-8460",
      "date": "2026-10-14",
      "epss": "0.02253",
      "percentile": "0.82572"
    },
    "fkie_nvd": {
      "configurations": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*",
                  "matchCriteriaId": "2E0C4316-BB30-4BB0-B57D-61302AC4E93F",
                  "versionEndIncluding": "6.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenBSD kernel version \u003c= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service."
        },
        {
          "lang": "es",
          "value": "La versi\u00f3n del n\u00facleo de OpenBSD anterior o igual a la versi\u00f3n 6.5 se puede forzar a crear largas cadenas de agujeros TCP SACK que provocan llamadas muy costosas a tcp_sack_option () para cada paquete SACK entrante que puede conducir a una denegaci\u00f3n de servicio."
        }
      ],
      "id": "CVE-2019-8460",
      "lastModified": "2024-11-21T04:49:56.840",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "MEDIUM",
            "cvssData": {
              "accessComplexity": "LOW",
              "accessVector": "NETWORK",
              "authentication": "NONE",
              "availabilityImpact": "PARTIAL",
              "baseScore": 5.0,
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
              "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": "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": "2019-08-26T20:15:10.030",
      "references": [
        {
          "source": "cve@checkpoint.com",
          "tags": [
            "Exploit",
            "Vendor Advisory"
          ],
          "url": "https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig"
        },
        {
          "source": "cve@checkpoint.com",
          "tags": [
            "Patch",
            "Third Party Advisory"
          ],
          "url": "https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f"
        },
        {
          "source": "cve@checkpoint.com",
          "tags": [
            "Exploit",
            "Patch",
            "Press/Media Coverage",
            "Third Party Advisory"
          ],
          "url": "https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/"
        },
        {
          "source": "cve@checkpoint.com",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20190905-0001/"
        },
        {
          "source": "cve@checkpoint.com",
          "url": "https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Exploit",
            "Vendor Advisory"
          ],
          "url": "https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch",
            "Third Party Advisory"
          ],
          "url": "https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Exploit",
            "Patch",
            "Press/Media Coverage",
            "Third Party Advisory"
          ],
          "url": "https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20190905-0001/"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03"
        }
      ],
      "sourceIdentifier": "cve@checkpoint.com",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-1049"
            }
          ],
          "source": "cve@checkpoint.com",
          "type": "Secondary"
        },
        {
          "description": [
            {
              "lang": "en",
              "value": "NVD-CWE-Other"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "2E0C4316-BB30-4BB0-B57D-61302AC4E93F",
                    "versionEndIncluding": "6.5",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "OpenBSD kernel version \u003c= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service."
          },
          {
            "lang": "es",
            "value": "La versi\u00f3n del n\u00facleo de OpenBSD anterior o igual a la versi\u00f3n 6.5 se puede forzar a crear largas cadenas de agujeros TCP SACK que provocan llamadas muy costosas a tcp_sack_option () para cada paquete SACK entrante que puede conducir a una denegaci\u00f3n de servicio."
          }
        ],
        "id": "CVE-2019-8460",
        "lastModified": "2024-11-21T04:49:56.840",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 5.0,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
                "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": "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": "2019-08-26T20:15:10.030",
        "references": [
          {
            "source": "cve@checkpoint.com",
            "tags": [
              "Exploit",
              "Vendor Advisory"
            ],
            "url": "https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig"
          },
          {
            "source": "cve@checkpoint.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f"
          },
          {
            "source": "cve@checkpoint.com",
            "tags": [
              "Exploit",
              "Patch",
              "Press/Media Coverage",
              "Third Party Advisory"
            ],
            "url": "https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/"
          },
          {
            "source": "cve@checkpoint.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20190905-0001/"
          },
          {
            "source": "cve@checkpoint.com",
            "url": "https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Vendor Advisory"
            ],
            "url": "https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Patch",
              "Press/Media Coverage",
              "Third Party Advisory"
            ],
            "url": "https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20190905-0001/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03"
          }
        ],
        "sourceIdentifier": "cve@checkpoint.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-1049"
              }
            ],
            "source": "cve@checkpoint.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-Other"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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

Loading timeline…




    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.