{"schemaVersion":3,"id":"USN-3586-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"isc-dhcp vulnerabilities\n\nKonstantin Orekhov discovered that the DHCP server incorrectly handled a\nlarge number of concurrent TCP sessions. A remote attacker could possibly\nuse this issue to cause a denial of service. This issue only affected\nUbuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2774)\n\nIt was discovered that the DHCP server incorrectly handled socket\ndescriptors. A remote attacker could possibly use this issue to cause a\ndenial of service. (CVE-2017-3144)\n\nFelix Wilhelm discovered that the DHCP client incorrectly handled certain\nmalformed responses. A remote attacker could use this issue to cause the\nDHCP client to crash, resulting in a denial of service, or possibly execute\narbitrary code. In the default installation, attackers would be isolated by\nthe dhclient AppArmor profile. (CVE-2018-5732)\n\nFelix Wilhelm discovered that the DHCP server incorrectly handled reference\ncounting. A remote attacker could possibly use this issue to cause the DHCP\nserver to crash, resulting in a denial of service. (CVE-2018-5733)","dates":{"published":"2018-03-01T17:47:25.000Z","modified":"2026-04-22T09:44:28.052Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"isc-dhcp","name":"isc-dhcp","label":"isc-dhcp","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/isc-dhcp","purlType":"deb","versions":[{"text":"< 4.2.4-7ubuntu12.12","noFixRecorded":false,"fixedIn":null},{"text":"< 4.3.3-5ubuntu12.9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.2.4-7ubuntu12.12 | < 4.3.3-5ubuntu12.9","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"isc-dhcp","label":"ISC DHCP","category":"server-app"}},"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-3586-1","label":"ubuntu.com/security/notices/USN-3586-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-2774","label":"ubuntu.com/security/CVE-2016-2774","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-3144","label":"ubuntu.com/security/CVE-2017-3144","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2018-5732","label":"ubuntu.com/security/CVE-2018-5732","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2018-5733","label":"ubuntu.com/security/CVE-2018-5733","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2016-2774","CVE-2017-3144","CVE-2018-5732","CVE-2018-5733"],"downstream":[],"duplicates":[],"related":["CVE-2016-2774","CVE-2017-3144","CVE-2018-5732","CVE-2018-5733"]},"timeline":[{"kind":"published","date":"2018-03-01T17:47:25.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T09:44:28.052Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T04:45:10.119Z","stale":false,"partial":false}}