{"id":"DEBIAN-CVE-2015-1798","details":"The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.","modified":"2026-08-27T22:48:53.115496958Z","published":"2015-04-08T10:59:04.610Z","upstream":["CVE-2015-1798"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2015-1798"}],"affected":[{"package":{"name":"ntp","ecosystem":"Debian:11","purl":"pkg:deb/debian/ntp?arch=source&distro=bullseye"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.2.6.p5+dfsg-6"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2015-1798.json"}}],"schema_version":"1.9.0"}