{"containers": {"cna": {"affected": [{"product": "ISC DHCP", "vendor": "ISC", "versions": [{"status": "affected", "version": "ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0"}]}], "credits": [{"lang": "en", "value": "ISC would like to thank Felix Wilhelm, Google Security Team, for reporting this vulnerability."}], "datePublic": "2018-02-28T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0."}], "metrics": [{"cvssV3_0": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"description": "Successful exploitation of this vulnerability may exhaust the memory available to dhcpd and/or cause it to crash, resulting in a denial of service to clients.", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2019-01-17T10:57:01.000Z", "orgId": "404fd4d2-a609-4245-b543-2c944a302a22", "shortName": "isc"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://kb.isc.org/docs/aa-01567"}, {"name": "RHSA-2018:0469", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2018:0469"}, {"name": "DSA-4133", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "https://www.debian.org/security/2018/dsa-4133"}, {"name": "USN-3586-2", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/3586-2/"}, {"name": "RHSA-2018:0483", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2018:0483"}, {"name": "USN-3586-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/3586-1/"}, {"name": "103188", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/103188"}, {"name": "1040437", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id/1040437"}, {"name": "[debian-lts-announce] 20180322 [SECURITY] [DLA 1313-1] isc-dhcp security update", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html"}], "solutions": [{"lang": "en", "value": "Upgrade to the patched release most closely related to your current version of DHCP.\n\n DHCP 4.1-ESV-R15-P1\n DHCP 4.3.6-P1\n DHCP 4.4.1"}], "source": {"discovery": "EXTERNAL"}, "title": "A malicious client can overflow a reference counter in ISC dhcpd", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-officer@isc.org", "DATE_PUBLIC": "2018-02-28T00:00:00.000Z", "ID": "CVE-2018-5733", "STATE": "PUBLIC", "TITLE": "A malicious client can overflow a reference counter in ISC dhcpd"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "ISC DHCP", "version": {"version_data": [{"version_name": "ISC DHCP", "version_value": "4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0"}]}}]}, "vendor_name": "ISC"}]}}, "credit": [{"lang": "eng", "value": "ISC would like to thank Felix Wilhelm, Google Security Team, for reporting this vulnerability."}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0."}]}, "impact": {"cvss": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Successful exploitation of this vulnerability may exhaust the memory available to dhcpd and/or cause it to crash, resulting in a denial of service to clients."}]}]}, "references": {"reference_data": [{"name": "https://kb.isc.org/docs/aa-01567", "refsource": "CONFIRM", "url": "https://kb.isc.org/docs/aa-01567"}, {"name": "RHSA-2018:0469", "refsource": "REDHAT", "url": "https://access.redhat.com/errata/RHSA-2018:0469"}, {"name": "DSA-4133", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2018/dsa-4133"}, {"name": "USN-3586-2", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/3586-2/"}, {"name": "RHSA-2018:0483", "refsource": "REDHAT", "url": "https://access.redhat.com/errata/RHSA-2018:0483"}, {"name": "USN-3586-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/3586-1/"}, {"name": "103188", "refsource": "BID", "url": "http://www.securityfocus.com/bid/103188"}, {"name": "1040437", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1040437"}, {"name": "[debian-lts-announce] 20180322 [SECURITY] [DLA 1313-1] isc-dhcp security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html"}]}, "solution": [{"lang": "en", "value": "Upgrade to the patched release most closely related to your current version of DHCP.\n\n DHCP 4.1-ESV-R15-P1\n DHCP 4.3.6-P1\n DHCP 4.4.1"}], "source": {"discovery": "EXTERNAL"}}}, "adp": [{"title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://kb.isc.org/docs/aa-01567"}, {"name": "RHSA-2018:0469", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "url": "https://access.redhat.com/errata/RHSA-2018:0469"}, {"name": "DSA-4133", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "https://www.debian.org/security/2018/dsa-4133"}, {"name": "USN-3586-2", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/3586-2/"}, {"name": "RHSA-2018:0483", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "url": "https://access.redhat.com/errata/RHSA-2018:0483"}, {"name": "USN-3586-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/3586-1/"}, {"name": "103188", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/103188"}, {"name": "1040437", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id/1040437"}, {"name": "[debian-lts-announce] 20180322 [SECURITY] [DLA 1313-1] isc-dhcp security update", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html"}, {"url": "https://security.netapp.com/advisory/ntap-20250425-0010/"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-04-25T23:02:52.084Z"}}]}, "cveMetadata": {"assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22", "assignerShortName": "isc", "cveId": "CVE-2018-5733", "datePublished": "2019-01-16T20:00:00.000Z", "dateReserved": "2018-01-17T00:00:00.000Z", "dateUpdated": "2025-04-25T23:02:52.084Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*", "matchCriteriaId": "3B88B6F8-3F13-4984-BBCF-F79BE911F15D", "versionEndIncluding": "4.2.8", "versionStartIncluding": "4.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*", "matchCriteriaId": "ADAC6E78-8F98-42C3-BE19-276826F84752", "versionEndIncluding": "4.3.6", "versionStartIncluding": "4.3.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*", "matchCriteriaId": "F27D0660-2F07-430B-A651-5D0B6AA763C0", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*", "matchCriteriaId": "FBAABA4E-0D34-4644-AC26-E272CEE6C361", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r10:*:*:*:*:*:*", "matchCriteriaId": "179443DC-4B6A-408A-8BE5-B3E72188F43E", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r10_b1:*:*:*:*:*:*", "matchCriteriaId": "C9BE7736-58CD-468B-84AB-B38C9B254BA6", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r10_rc1:*:*:*:*:*:*", "matchCriteriaId": "7EB6F7F0-B2A0-47E3-AD7A-4E7618A36F90", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r11:*:*:*:*:*:*", "matchCriteriaId": "ADF80D19-3B0A-4A74-944E-F33CCC30EADA", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r11_b1:*:*:*:*:*:*", "matchCriteriaId": "40B21FCB-43A8-4266-934D-ECFF8138F637", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc1:*:*:*:*:*:*", "matchCriteriaId": "69D49F23-9074-49E7-985F-4D93393324CD", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc2:*:*:*:*:*:*", "matchCriteriaId": "3F729D1D-7234-4BC2-839B-AE1BB9D16C25", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r12:*:*:*:*:*:*", "matchCriteriaId": "FBA64EEC-C0C7-4F11-8131-2868691E54DB", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r12_b1:*:*:*:*:*:*", "matchCriteriaId": "157520D7-AE39-4E23-A8CF-DD75EA78C055", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r12_p1:*:*:*:*:*:*", "matchCriteriaId": "B07118EC-9508-42B8-8D09-5CE310DA2B43", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r13:*:*:*:*:*:*", "matchCriteriaId": "A157E664-6ACE-44CE-AC07-64898B182EA1", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r13_b1:*:*:*:*:*:*", "matchCriteriaId": "0056BF7A-4A70-4F1D-89C2-25CCDB65217B", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r14:*:*:*:*:*:*", "matchCriteriaId": "1D21F05D-246F-41F5-81FD-286C26168E2E", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r14_b1:*:*:*:*:*:*", "matchCriteriaId": "12103C87-C942-481A-A68C-7BC83F964C06", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r15:*:*:*:*:*:*", "matchCriteriaId": "924E91FF-495F-4963-827F-57F7340C6560", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:*", "matchCriteriaId": "A5E2FFC7-6E73-463E-846C-C403E41A2022", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*", "matchCriteriaId": "E9D08285-745D-40AB-9A78-F467712CDA5A", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:*", "matchCriteriaId": "1D115F1F-1A3A-4924-AF10-723B3BB0CBB9", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:*", "matchCriteriaId": "79F235F0-AD16-4E5B-AB60-97F0BB86AEB6", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:*", "matchCriteriaId": "E84D5E5B-0336-4166-AAAC-49375E3AF971", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r5_b1:*:*:*:*:*:*", "matchCriteriaId": "09561C97-563C-4DDC-9EE4-E83EFFD467D6", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc1:*:*:*:*:*:*", "matchCriteriaId": "519CF0CC-FB12-4C68-88A0-E0E15738C620", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc2:*:*:*:*:*:*", "matchCriteriaId": "80EB131E-32E5-458F-8DDA-48835D2D883F", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r6:*:*:*:*:*:*", "matchCriteriaId": "65E0296F-3522-4B43-AF34-CFE1AE7EEC1E", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r7:*:*:*:*:*:*", "matchCriteriaId": "69F6E619-A52B-4A60-8247-41ADD0E7D655", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r8:*:*:*:*:*:*", "matchCriteriaId": "AA48EBAA-10B7-43D6-9A27-99F2578DF7F6", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r8_b1:*:*:*:*:*:*", "matchCriteriaId": "20040BB3-F157-4505-BB60-0D919A7D1436", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r8_rc1:*:*:*:*:*:*", "matchCriteriaId": "974A8587-8351-490A-82D9-B541862CA4C7", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r9:*:*:*:*:*:*", "matchCriteriaId": "7DABD43E-818A-4B21-B4E7-753056D4A184", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r9_b1:*:*:*:*:*:*", "matchCriteriaId": "EE991D0E-2E2D-4844-9BBD-235D8BC5FB7A", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r9_rc1:*:*:*:*:*:*", "matchCriteriaId": "975EF88C-988F-40A6-B7D1-D27439144CC2", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:rc1:*:*:*:*:*:*", "matchCriteriaId": "3120B566-2BB6-4A1F-9ED7-E099E2870919", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1.0:-:*:*:*:*:*:*", "matchCriteriaId": "78214BCE-9739-40B9-A32E-89C16F7195DC", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.4.0:*:*:*:*:*:*:*", "matchCriteriaId": "13C8AD22-6E39-4899-88B2-7ED44BE890A6", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*", "matchCriteriaId": "EE249E1B-A1FD-4E08-AA71-A0E1F10FFE97", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "33C068A4-3780-4EAB-A937-6082DF847564", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*", "matchCriteriaId": "9BBCD86A-E6C7-4444-9D74-F861084090F0", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "51EF4996-72F4-4FA4-814F-F5991E7A8318", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*", "matchCriteriaId": "D99A687E-EAE6-417E-A88E-D0082BC194CD", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*", "matchCriteriaId": "B353CE99-D57C-465B-AAB0-73EF581127D1", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*", "matchCriteriaId": "9EC0D196-F7B8-4BDD-9050-779F7A7FBEE4", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*", "matchCriteriaId": "A4E9DD8A-A68B-4A69-8B01-BFF92A2020A8", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*", "matchCriteriaId": "BF77CDCF-B9C9-427D-B2BF-36650FB2148C", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*", "matchCriteriaId": "E5ED5807-55B7-47C5-97A6-03233F4FBC3A", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "825ECE2D-E232-46E0-A047-074B34DB1E97", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "matchCriteriaId": "B5A6F2F3-4894-4392-8296-3B8DD2679084", "vulnerable": true}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B", "vulnerable": true}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*", "matchCriteriaId": "9070C9D8-A14A-467F-8253-33B966C16886", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0."}, {"lang": "es", "value": "Un cliente malicioso al que se le permite enviar grandes cantidades de tr\u00e1fico (miles de millones de paquetes) a un servidor DHCP puede terminar desbordando un contador de referencia de 32 bits, provocando el cierre inesperado de dhcpd. Afecta a ISC DHCP desde la versi\u00f3n 4.1.0 hasta la 4.1-ESV-R15, desde la versi\u00f3n 4.2.0 hasta la 4.2.8, desde la versi\u00f3n 4.3.0 hasta la 4.3.6 y a la versi\u00f3n 4.4.0."}], "id": "CVE-2018-5733", "lastModified": "2025-04-25T23:15:15.590", "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": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-officer@isc.org", "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": "2019-01-16T20:29:00.753", "references": [{"source": "security-officer@isc.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/103188"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1040437"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:0469"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:0483"}, {"source": "security-officer@isc.org", "tags": ["Vendor Advisory"], "url": "https://kb.isc.org/docs/aa-01567"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3586-1/"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3586-2/"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2018/dsa-4133"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/103188"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1040437"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:0469"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:0483"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.isc.org/docs/aa-01567"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20250425-0010/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3586-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3586-2/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2018/dsa-4133"}], "sourceIdentifier": "security-officer@isc.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank ISC for reporting this issue. Upstream acknowledges Felix Wilhelm (Google) as the original reporter.", "affected_release": [{"advisory": "RHSA-2018:0469", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "dhcp-12:4.1.1-53.P1.el6_9.3", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2018-03-09T00:00:00Z"}, {"advisory": "RHSA-2018:0483", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "dhcp-12:4.2.5-58.el7_4.3", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-03-12T00:00:00Z"}], "bugzilla": {"description": "dhcp: Reference count overflow in dhcpd allows denial of service", "id": "1549961", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1549961"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-190", "details": ["A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0.", "A denial of service flaw was found in the way dhcpd handled reference counting when processing client requests. A malicious DHCP client could use this flaw to trigger a reference count overflow on the server side, potentially causing dhcpd to crash, by sending large amounts of traffic."], "name": "CVE-2018-5733", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "dhcp", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "dhcp", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2018-02-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-5733\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-5733\nhttps://kb.isc.org/article/AA-01567"], "threat_severity": "Moderate"}

{}