{"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. 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