{"id":"USN-3339-1","summary":"openvpn vulnerabilities","details":"Karthikeyan 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)\n\n","modified":"2026-02-10T04:41:09Z","published":"2017-06-22T18:02:03Z","related":["UBUNTU-CVE-2016-6329","UBUNTU-CVE-2017-7479","UBUNTU-CVE-2017-7508","UBUNTU-CVE-2017-7520","UBUNTU-CVE-2017-7521"],"upstream":["CVE-2016-6329","CVE-2017-7479","CVE-2017-7508","CVE-2017-7520","CVE-2017-7521","UBUNTU-CVE-2016-6329","UBUNTU-CVE-2017-7479","UBUNTU-CVE-2017-7508","UBUNTU-CVE-2017-7520","UBUNTU-CVE-2017-7521"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3339-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-6329"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-7479"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-7508"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-7520"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-7521"}],"affected":[{"package":{"name":"openvpn","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/openvpn@2.3.2-7ubuntu3.2?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.2-7ubuntu3.2"}]}],"versions":["2.3.2-4ubuntu1","2.3.2-5ubuntu1","2.3.2-7ubuntu1","2.3.2-7ubuntu2","2.3.2-7ubuntu3","2.3.2-7ubuntu3.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.2-7ubuntu3.2","binary_name":"openvpn"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2016-6329","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2017-7479","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2017-7508","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2017-7520","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2017-7521","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:14.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3339-1.json"}},{"package":{"name":"openvpn","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/openvpn@2.3.10-1ubuntu2.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.10-1ubuntu2.1"}]}],"versions":["2.3.7-1ubuntu1","2.3.7-2ubuntu1","2.3.8-1ubuntu1","2.3.10-1ubuntu1","2.3.10-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.10-1ubuntu2.1","binary_name":"openvpn"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2016-6329","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2017-7479","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2017-7508","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2017-7520","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2017-7521","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3339-1.json"}}],"schema_version":"1.7.3"}