{"schemaVersion":3,"id":"USN-3339-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"openvpn vulnerabilities\n\nKarthikeyan Bhargavan and Gaëtan Leurent discovered that 64-bit block\nciphers are vulnerable to a birthday attack. A remote attacker could\npossibly use this issue to recover cleartext data. Fixing this issue\nrequires a configuration change to switch to a different cipher. This\nupdate adds a warning to the log file when a 64-bit block cipher is in use.\nThis issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and\nUbuntu 16.10. (CVE-2016-6329)\n\nIt was discovered that OpenVPN incorrectly handled rollover of packet ids.\nAn authenticated remote attacker could use this issue to cause OpenVPN to\ncrash, resulting in a denial of service. This issue only affected Ubuntu\n14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-7479)\n\nGuido Vranken discovered that OpenVPN incorrectly handled certain malformed\nIPv6 packets. A remote attacker could use this issue to cause OpenVPN to\ncrash, resulting in a denial of service. (CVE-2017-7508)\n\nGuido Vranken discovered that OpenVPN incorrectly handled an HTTP proxy\nwith NTLM authentication. A remote attacker could use this issue to cause\nOpenVPN clients to crash, resulting in a denial of service, or possibly\nexpose sensitive memory contents. (CVE-2017-7520)\n\nGuido Vranken discovered that OpenVPN incorrectly handled certain x509\nextensions. A remote attacker could use this issue to cause OpenVPN to\ncrash, resulting in a denial of service. (CVE-2017-7521)","dates":{"published":"2017-06-22T18:02:03.000Z","modified":"2026-02-10T04:41:09.000Z","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":"openvpn","name":"openvpn","label":"openvpn","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openvpn","purlType":"deb","versions":[{"text":"< 2.3.2-7ubuntu3.2","noFixRecorded":false,"fixedIn":null},{"text":"< 2.3.10-1ubuntu2.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.3.2-7ubuntu3.2 | < 2.3.10-1ubuntu2.1","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openvpn","label":"OpenVPN","category":"app"}},"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-3339-1","label":"ubuntu.com/security/notices/USN-3339-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-6329","label":"ubuntu.com/security/CVE-2016-6329","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7479","label":"ubuntu.com/security/CVE-2017-7479","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7508","label":"ubuntu.com/security/CVE-2017-7508","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7520","label":"ubuntu.com/security/CVE-2017-7520","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7521","label":"ubuntu.com/security/CVE-2017-7521","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2016-6329","CVE-2017-7479","CVE-2017-7508","CVE-2017-7520","CVE-2017-7521"],"downstream":[],"duplicates":[],"related":["CVE-2016-6329","CVE-2017-7479","CVE-2017-7508","CVE-2017-7520","CVE-2017-7521"]},"timeline":[{"kind":"published","date":"2017-06-22T18:02:03.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-10T04:41:09.000Z","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":"2026-10-21T07:41:49.258Z","stale":false,"partial":false}}