{"id":"UBUNTU-CVE-2021-34432","details":"In Eclipse Mosquitto versions 2.07 and earlier, the server will crash if the client tries to send a PUBLISH packet with topic length = 0.","modified":"2025-07-16T07:55:23.589521Z","published":"2021-07-27T16:15:00Z","withdrawn":"2025-07-18T16:46:52Z","upstream":["CVE-2021-34432"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-34432"},{"type":"REPORT","url":"https://github.com/eclipse/mosquitto/commit/9b08faf0bdaf5a4f2e6e3dd1ea7e8c57f70418d6"},{"type":"REPORT","url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=574141"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-34432"}],"affected":[{"package":{"name":"mosquitto","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mosquitto@2.0.11-1ubuntu1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.11-1ubuntu1"}]}],"versions":["2.0.11-1","2.0.11-1build1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libmosquitto-dev","binary_version":"2.0.11-1ubuntu1"},{"binary_name":"libmosquitto1","binary_version":"2.0.11-1ubuntu1"},{"binary_version":"2.0.11-1ubuntu1","binary_name":"libmosquitto1-dbgsym"},{"binary_name":"libmosquittopp-dev","binary_version":"2.0.11-1ubuntu1"},{"binary_name":"libmosquittopp1","binary_version":"2.0.11-1ubuntu1"},{"binary_name":"libmosquittopp1-dbgsym","binary_version":"2.0.11-1ubuntu1"},{"binary_name":"mosquitto","binary_version":"2.0.11-1ubuntu1"},{"binary_name":"mosquitto-clients","binary_version":"2.0.11-1ubuntu1"},{"binary_version":"2.0.11-1ubuntu1","binary_name":"mosquitto-clients-dbgsym"},{"binary_name":"mosquitto-dbgsym","binary_version":"2.0.11-1ubuntu1"},{"binary_name":"mosquitto-dev","binary_version":"2.0.11-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34432.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":"Ubuntu","score":"medium"}]}