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This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363."}, {"lang": "es", "value": "Jonathan Looney descubri\u00f3 que el tama\u00f1o m\u00e1ximo de segmento (MSS) por defecto del kernel de Linux est\u00e1 codificado a 48 bytes. Esto permite a un peer remoto fragmentar las colas de reenv\u00edo de TCP significativamente m\u00e1s que si se aplicara un MSS m\u00e1s grande. Un atacante remoto podr\u00eda usar esto para causar una denegaci\u00f3n de servicio. Esto se ha corregido en versiones de kernel estables 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, y se corrige en los commits 967c05aee439e6e5d7d805e195b3a20f5c433d6 y 5f3e2bf008c2221478101ee72f5c4ccccc"}], "id": "CVE-2019-11479", "lastModified": "2023-11-07T03:03:02.020", "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}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security@ubuntu.com", "type": "Secondary"}], "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": "2019-06-19T00:15:12.767", "references": [{"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt"}, {"source": "security@ubuntu.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2019/06/28/2"}, {"source": "security@ubuntu.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2019/07/06/3"}, {"source": "security@ubuntu.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2019/07/06/4"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/108818"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:1594"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:1602"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:1699"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/vulnerabilities/tcpsack"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf"}, {"source": "security@ubuntu.com", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5f3e2bf008c2221478101ee72f5cb4654b9fc363"}, {"source": "security@ubuntu.com", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=967c05aee439e6e5d7d805e195b3a20ef5c433d6"}, {"source": "security@ubuntu.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10287"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0008"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20190625-0001/"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://support.f5.com/csp/article/K35421172"}, {"source": "security@ubuntu.com", "url": "https://support.f5.com/csp/article/K35421172?utm_source=f5support&amp%3Butm_medium=RSS"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4041-1/"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4041-2/"}, {"source": "security@ubuntu.com", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/905115"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpujan2020.html"}, {"source": "security@ubuntu.com", "url": "https://www.oracle.com/security-alerts/cpuoct2020.html"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory"], "url": "https://www.synology.com/security/advisory/Synology_SA_19_28"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.us-cert.gov/ics/advisories/icsa-19-253-03"}, {"source": "security@ubuntu.com", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.us-cert.gov/ics/advisories/icsma-20-170-06"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-405"}], "source": "security@ubuntu.com", "type": "Secondary"}]}

{}