fkie_cve-2019-8460
Vulnerability from fkie_nvd
Published
2019-08-26 20:15
Modified
2024-11-21 04:49
Severity ?
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.
References
{
"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"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.