{"id":"UBUNTU-CVE-2023-28366","details":"The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function.","modified":"2026-02-05T08:33:59.190684Z","published":"2023-09-01T16:15:00Z","related":["USN-6492-1"],"upstream":["CVE-2023-28366"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-28366"},{"type":"REPORT","url":"https://mosquitto.org/blog/2023/08/version-2-0-16-released/"},{"type":"REPORT","url":"https://github.com/eclipse/mosquitto/commit/6113eac95a9df634fbc858be542c4a0456bfe7b9"},{"type":"REPORT","url":"https://github.com/eclipse/mosquitto/commit/6113eac95a9df634fbc858be542c4a0456bfe7b9"},{"type":"REPORT","url":"https://www.compass-security.com/fileadmin/Research/Advisories/2023_02_CSNC-2023-001_Eclipse_Mosquitto_Memory_Leak.txt"},{"type":"REPORT","url":"https://github.com/eclipse/mosquitto/compare/v2.0.15...v2.0.16"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6492-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-28366"}],"affected":[{"package":{"name":"mosquitto","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/mosquitto@1.4.8-1ubuntu0.16.04.7+esm2?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.3-1","1.4.4-1","1.4.7-1","1.4.8-1","1.4.8-1build1","1.4.8-1ubuntu0.16.04.1","1.4.8-1ubuntu0.16.04.2","1.4.8-1ubuntu0.16.04.3","1.4.8-1ubuntu0.16.04.4","1.4.8-1ubuntu0.16.04.5","1.4.8-1ubuntu0.16.04.6","1.4.8-1ubuntu0.16.04.7","1.4.8-1ubuntu0.16.04.7+esm1","1.4.8-1ubuntu0.16.04.7+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.8-1ubuntu0.16.04.7+esm2","binary_name":"libmosquitto-dev"},{"binary_version":"1.4.8-1ubuntu0.16.04.7+esm2","binary_name":"libmosquitto1"},{"binary_version":"1.4.8-1ubuntu0.16.04.7+esm2","binary_name":"libmosquittopp-dev"},{"binary_version":"1.4.8-1ubuntu0.16.04.7+esm2","binary_name":"libmosquittopp1"},{"binary_version":"1.4.8-1ubuntu0.16.04.7+esm2","binary_name":"mosquitto"},{"binary_version":"1.4.8-1ubuntu0.16.04.7+esm2","binary_name":"mosquitto-clients"},{"binary_version":"1.4.8-1ubuntu0.16.04.7+esm2","binary_name":"mosquitto-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-28366.json"}},{"package":{"name":"mosquitto","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/mosquitto@1.4.15-2ubuntu0.18.04.3+esm2?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.12-1","1.4.14-1","1.4.14-2","1.4.14-2build1","1.4.15-1","1.4.15-2","1.4.15-2ubuntu0.18.04.1","1.4.15-2ubuntu0.18.04.2","1.4.15-2ubuntu0.18.04.3","1.4.15-2ubuntu0.18.04.3+esm1","1.4.15-2ubuntu0.18.04.3+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.15-2ubuntu0.18.04.3+esm2","binary_name":"libmosquitto-dev"},{"binary_version":"1.4.15-2ubuntu0.18.04.3+esm2","binary_name":"libmosquitto1"},{"binary_version":"1.4.15-2ubuntu0.18.04.3+esm2","binary_name":"libmosquittopp-dev"},{"binary_version":"1.4.15-2ubuntu0.18.04.3+esm2","binary_name":"libmosquittopp1"},{"binary_version":"1.4.15-2ubuntu0.18.04.3+esm2","binary_name":"mosquitto"},{"binary_version":"1.4.15-2ubuntu0.18.04.3+esm2","binary_name":"mosquitto-clients"},{"binary_version":"1.4.15-2ubuntu0.18.04.3+esm2","binary_name":"mosquitto-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-28366.json"}},{"package":{"name":"mosquitto","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/mosquitto@1.6.9-1ubuntu0.1~esm2?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.6-1","1.6.7-1","1.6.8-1","1.6.8-2","1.6.9-1~build1","1.6.9-1","1.6.9-1ubuntu0.1~esm1","1.6.9-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.6.9-1ubuntu0.1~esm2","binary_name":"libmosquitto-dev"},{"binary_version":"1.6.9-1ubuntu0.1~esm2","binary_name":"libmosquitto1"},{"binary_version":"1.6.9-1ubuntu0.1~esm2","binary_name":"libmosquittopp-dev"},{"binary_version":"1.6.9-1ubuntu0.1~esm2","binary_name":"libmosquittopp1"},{"binary_version":"1.6.9-1ubuntu0.1~esm2","binary_name":"mosquitto"},{"binary_version":"1.6.9-1ubuntu0.1~esm2","binary_name":"mosquitto-clients"},{"binary_version":"1.6.9-1ubuntu0.1~esm2","binary_name":"mosquitto-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-28366.json"}},{"package":{"name":"mosquitto","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mosquitto@2.0.11-1ubuntu1.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.11-1ubuntu1.1"}]}],"versions":["2.0.11-1","2.0.11-1build1","2.0.11-1ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.0.11-1ubuntu1.1","binary_name":"libmosquitto-dev"},{"binary_version":"2.0.11-1ubuntu1.1","binary_name":"libmosquitto1"},{"binary_version":"2.0.11-1ubuntu1.1","binary_name":"libmosquittopp-dev"},{"binary_version":"2.0.11-1ubuntu1.1","binary_name":"libmosquittopp1"},{"binary_version":"2.0.11-1ubuntu1.1","binary_name":"mosquitto"},{"binary_version":"2.0.11-1ubuntu1.1","binary_name":"mosquitto-clients"},{"binary_version":"2.0.11-1ubuntu1.1","binary_name":"mosquitto-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-28366.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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}