{"id":"USN-6492-1","summary":"mosquitto vulnerabilities","details":"Kathrin Kleinhammer discovered that Mosquitto incorrectly handled certain\ninputs. If a user or an automated system were provided with a specially crafted\ninput, a remote attacker could possibly use this issue to cause a denial of\nservice. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-34431)\n\nZhanxiang Song discovered that Mosquitto incorrectly handled certain inputs. If\na user or an automated system were provided with a specially crafted input, a\nremote attacker could possibly use this issue to cause an authorisation bypass.\nThis issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2021-34434)\n\nZhanxiang Song, Bin Yuan, DeQing Zou, and Hai Jin discovered that Mosquitto\nincorrectly handled certain inputs. If a user or an automated system were\nprovided with a specially crafted input, a remote attacker could possibly use\nthis issue to cause a denial of service. This issue only affected Ubuntu 20.04\nLTS and Ubuntu 22.04 LTS. (CVE-2021-41039)\n\nZhengjie Du discovered that Mosquitto incorrectly handled certain inputs. If a\nuser or an automated system were provided with a specially crafted input file,\na remote attacker could possibly use this issue to cause a denial of service.\n(CVE-2023-0809)\n\nIt was discovered that Mosquitto incorrectly handled certain inputs. If a user\nor an automated system were provided with a specially crafted input, a remote\nattacker could possibly use this issue to cause a denial of service.\n(CVE-2023-3592)\n\nMischa Bachmann discovered that Mosquitto incorrectly handled certain inputs.\nIf a user or an automated system were provided with a specially crafted input,\na remote attacker could possibly use this issue to cause a denial of service.\nThis issue was only fixed in Ubuntu 22.04 LTS and Ubuntu 23.04.\n(CVE-2023-28366)\n","modified":"2026-02-10T04:43:25Z","published":"2023-11-21T15:23:51Z","related":["UBUNTU-CVE-2021-34431","UBUNTU-CVE-2021-34434","UBUNTU-CVE-2021-41039","UBUNTU-CVE-2023-0809","UBUNTU-CVE-2023-28366","UBUNTU-CVE-2023-3592"],"upstream":["CVE-2021-34431","CVE-2021-34434","CVE-2021-41039","CVE-2023-0809","CVE-2023-28366","CVE-2023-3592","UBUNTU-CVE-2021-34431","UBUNTU-CVE-2021-34434","UBUNTU-CVE-2021-41039","UBUNTU-CVE-2023-0809","UBUNTU-CVE-2023-28366","UBUNTU-CVE-2023-3592"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6492-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-34431"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-34434"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-41039"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-0809"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-3592"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-28366"}],"affected":[{"package":{"name":"mosquitto","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/mosquitto@1.6.9-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.9-1ubuntu0.1~esm1"}]}],"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"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"1.6.9-1ubuntu0.1~esm1","binary_name":"libmosquitto-dev"},{"binary_version":"1.6.9-1ubuntu0.1~esm1","binary_name":"libmosquitto1"},{"binary_version":"1.6.9-1ubuntu0.1~esm1","binary_name":"libmosquittopp-dev"},{"binary_version":"1.6.9-1ubuntu0.1~esm1","binary_name":"libmosquittopp1"},{"binary_version":"1.6.9-1ubuntu0.1~esm1","binary_name":"mosquitto"},{"binary_version":"1.6.9-1ubuntu0.1~esm1","binary_name":"mosquitto-clients"},{"binary_version":"1.6.9-1ubuntu0.1~esm1","binary_name":"mosquitto-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6492-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-34431"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-41039"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2023-0809"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","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":"medium","type":"Ubuntu"}],"id":"CVE-2023-3592"}]}}},{"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/usn/USN-6492-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-34434"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-41039"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2023-0809"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","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":"medium","type":"Ubuntu"}],"id":"CVE-2023-3592"},{"severity":[{"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":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2023-28366"}]}}}],"schema_version":"1.7.3"}