{"id":"UBUNTU-CVE-2015-7691","details":"The crypto_xmit function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (crash) via crafted packets containing particular autokey operations.  NOTE: This vulnerability exists due to an incomplete fix for CVE-2014-9750.","modified":"2026-02-04T03:49:23.509259Z","published":"2015-10-22T00:00:00Z","related":["USN-2783-1"],"upstream":["CVE-2015-7691"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-7691"},{"type":"REPORT","url":"http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2783-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-7691"}],"affected":[{"package":{"name":"ntp","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/ntp@1:4.2.6.p5+dfsg-3ubuntu2.14.04.5?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.2.6.p5+dfsg-3ubuntu2.14.04.5"}]}],"versions":["1:4.2.6.p5+dfsg-3ubuntu2","1:4.2.6.p5+dfsg-3ubuntu2.14.04.1","1:4.2.6.p5+dfsg-3ubuntu2.14.04.2","1:4.2.6.p5+dfsg-3ubuntu2.14.04.3"],"ecosystem_specific":{"binaries":[{"binary_version":"1:4.2.6.p5+dfsg-3ubuntu2.14.04.5","binary_name":"ntp"},{"binary_version":"1:4.2.6.p5+dfsg-3ubuntu2.14.04.5","binary_name":"ntpdate"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-7691.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"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"}]}