{"id":"CVE-2023-0809","aliases":["ALPINE-CVE-2023-0809","BELL-CVE-2023-0809","DEBIAN-CVE-2023-0809","DSA-5511-1","EUVD-2023-12814","GHSA-v9xr-r3xx-x9gc","OESA-2023-1716","OESA-2023-1717","OESA-2023-1718","RHSA-2024:0797","RHSA-2024:1061","UBUNTU-CVE-2023-0809","USN-6492-1","openSUSE-SU-2024:13546-1"],"status":"published","title":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that...","description":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT 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Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.","status":"published","published":"2023-10-02T18:56:26.824Z","modified":"2025-02-13T16:39:08.267Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:35:35.256261Z"}],"euvd":[{"id":"EUVD-2023-12814","description":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.","status":"published","published":"2023-10-02T18:56:26Z","modified":"2025-02-13T16:39:08Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-03T00:03:51.861062Z"}],"ghsa":[{"id":"GHSA-v9xr-r3xx-x9gc","title":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that...","description":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.","status":"published","published":"2023-10-02T21:30:17Z","modified":"2024-01-16T05:06:04Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-770","CWE-789"],"updated_at":"2026-11-02T14:55:25.607975Z"}],"nvd":[{"id":"CVE-2023-0809","description":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.","status":"published","published":"2023-10-02T19:15:09.717Z","modified":"2026-06-17T05:26:21.427Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"}],"cwes":["CWE-789","CWE-770"],"updated_at":"2026-11-02T14:08:35.022405Z"}],"osv":[{"id":"ALPINE-CVE-2023-0809","description":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.","status":"published","published":"2023-10-02T19:15:09.717Z","modified":"2026-10-26T17:17:58.603699306Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:27:49.202584Z"},{"id":"BELL-CVE-2023-0809","title":"CVE-2023-0809 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:15:42.438271Z","modified":"2026-01-26T09:47:11.541109Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:28:17.151188Z"},{"id":"CVE-2023-0809","description":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.","status":"published","published":"2023-10-02T18:56:26.824Z","modified":"2026-10-28T02:30:25.506133602Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T15:44:29.487253Z"},{"id":"DEBIAN-CVE-2023-0809","description":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.","status":"published","published":"2023-10-02T19:15:09.717Z","modified":"2026-10-26T18:01:19.409067332Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:45:39.369204Z"},{"id":"OESA-2023-1716","title":"mosquitto security update","description":"Mosquitto is an open source message broker that implements the MQ Telemetry Transport protocol version 3.1 and 3.1.1 MQTT provides a lightweight method of carrying out messaging using a publish/subscribe model. This makes it suitable for \u0026quot;machine to machine\u0026quot; messaging such as with low power sensors or mobile devices such as phones, embedded computers or micro-controllers like the Arduino.\r\n\r\nSecurity Fix(es):\r\n\r\nIn Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.(CVE-2023-0809)","status":"published","published":"2023-10-13T11:06:10Z","modified":"2026-08-18T01:17:54.661849046Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:40.328856Z"},{"id":"OESA-2023-1717","title":"mosquitto security update","description":"Mosquitto is an open source message broker that implements the MQ Telemetry Transport protocol version 3.1 and 3.1.1 MQTT provides a lightweight method of carrying out messaging using a publish/subscribe model. This makes it suitable for \u0026quot;machine to machine\u0026quot; messaging such as with low power sensors or mobile devices such as phones, embedded computers or micro-controllers like the Arduino.\r\n\r\nSecurity Fix(es):\r\n\r\nIn Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.(CVE-2023-0809)","status":"published","published":"2023-10-13T11:06:10Z","modified":"2026-08-18T01:17:54.251928147Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:40.328856Z"},{"id":"OESA-2023-1718","title":"mosquitto security update","description":"Mosquitto is an open source message broker that implements the MQ Telemetry Transport protocol version 3.1 and 3.1.1 MQTT provides a lightweight method of carrying out messaging using a publish/subscribe model. This makes it suitable for \u0026quot;machine to machine\u0026quot; messaging such as with low power sensors or mobile devices such as phones, embedded computers or micro-controllers like the Arduino.\r\n\r\nSecurity Fix(es):\r\n\r\nIn Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.(CVE-2023-0809)","status":"published","published":"2023-10-13T11:06:10Z","modified":"2026-08-18T01:17:54.554549734Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:40.328856Z"},{"id":"RHSA-2024:0797","title":"Red Hat Security Advisory: Satellite 6.14.2 Async Security Update","status":"published","published":"2024-09-30T07:12:50Z","modified":"2026-10-15T10:06:58Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:12.270484Z"},{"id":"RHSA-2024:1061","title":"Red Hat Security Advisory: Red Hat Satellite 6 security and bug fix update","status":"published","published":"2024-09-16T17:34:41Z","modified":"2026-06-26T12:22:22.133003512Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:12.787505Z"},{"id":"UBUNTU-CVE-2023-0809","description":"In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.","status":"published","published":"2023-10-02T19:15:00Z","modified":"2026-04-22T13:59:15.919645Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T16:54:18.756095Z"},{"id":"DSA-5511-1","title":"mosquitto - security update","status":"published","published":"2023-10-01T00:00:00Z","modified":"2026-03-09T02:10:31.291593Z","updated_at":"2026-11-02T15:46:17.892347Z"},{"id":"openSUSE-SU-2024:13546-1","title":"libmosquitto1-2.0.18-1.1 on GA media","description":"These are all security issues fixed in the libmosquitto1-2.0.18-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:09:01.63401Z","updated_at":"2026-11-02T16:58:36.327643Z"},{"id":"USN-6492-1","title":"mosquitto vulnerabilities","description":"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","status":"published","published":"2023-11-21T15:23:51Z","modified":"2026-04-22T10:41:36.101799Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}