ubuntu-cve-2023-0809
Vulnerability from osv_ubuntu
Published
2023-10-02 19:15
Modified
2026-04-22 07:44
Summary
Details

In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.

Severity
5.8 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libmosquitto1",
            "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "mosquitto",
        "purl": "pkg:deb/ubuntu/mosquitto@1.6.9-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.9-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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": "No subscription required",
        "binaries": [
          {
            "binary_name": "libmosquitto1",
            "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "mosquitto",
        "purl": "pkg:deb/ubuntu/mosquitto@2.0.11-1ubuntu1.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.11-1ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.11-1",
        "2.0.11-1build1",
        "2.0.11-1ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.",
  "id": "UBUNTU-CVE-2023-0809",
  "modified": "2026-04-22T07:44:54Z",
  "published": "2023-10-02T19:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-0809"
    },
    {
      "type": "REPORT",
      "url": "https://mosquitto.org/blog/2023/08/version-2-0-16-released/"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6492-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-0809"
    }
  ],
  "related": [
    "USN-6492-1"
  ],
  "schema_version": "1.7.0",
  "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"
    }
  ],
  "upstream": [
    "CVE-2023-0809"
  ]
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.