{"id":"DEBIAN-CVE-2014-9721","details":"libzmq before 4.0.6 and 4.1.x before 4.1.1 allows remote attackers to conduct downgrade attacks and bypass ZMTP v3 protocol security mechanisms via a ZMTP v2 or earlier header.","modified":"2026-08-11T06:47:41.587328420Z","published":"2015-06-03T20:59:00.090Z","upstream":["CVE-2014-9721"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2014-9721"}],"affected":[{"package":{"name":"zeromq3","ecosystem":"Debian:11","purl":"pkg:deb/debian/zeromq3?arch=source&distro=bullseye"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.5+dfsg-3"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2014-9721.json"}},{"package":{"name":"zeromq3","ecosystem":"Debian:12","purl":"pkg:deb/debian/zeromq3?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.5+dfsg-3"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2014-9721.json"}},{"package":{"name":"zeromq3","ecosystem":"Debian:13","purl":"pkg:deb/debian/zeromq3?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.5+dfsg-3"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2014-9721.json"}},{"package":{"name":"zeromq3","ecosystem":"Debian:14","purl":"pkg:deb/debian/zeromq3?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.5+dfsg-3"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2014-9721.json"}}],"schema_version":"1.9.0"}