UBUNTU-CVE-2023-5632

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Source
https://ubuntu.com/security/CVE-2023-5632
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-5632.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2023-5632
Upstream
Withdrawn
2025-07-18T16:54:11Z
Published
2023-10-18T09:15:00Z
Modified
2025-07-16T08:29:47.635526Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data causes the EPOLLOUT event to be added, which results excessive CPU consumption. This could be used by a malicious actor to perform denial of service type attack. This issue is fixed in 2.0.6

References

Affected packages

Ubuntu:22.04:LTS / mosquitto

Package

Name
mosquitto
Purl
pkg:deb/ubuntu/mosquitto@2.0.11-1ubuntu1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.0.11-1ubuntu1

Affected versions

2.*

2.0.11-1
2.0.11-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmosquitto-dev",
            "binary_version": "2.0.11-1ubuntu1"
        },
        {
            "binary_name": "libmosquitto1",
            "binary_version": "2.0.11-1ubuntu1"
        },
        {
            "binary_name": "libmosquitto1-dbgsym",
            "binary_version": "2.0.11-1ubuntu1"
        },
        {
            "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_name": "mosquitto-clients-dbgsym",
            "binary_version": "2.0.11-1ubuntu1"
        },
        {
            "binary_name": "mosquitto-dbgsym",
            "binary_version": "2.0.11-1ubuntu1"
        },
        {
            "binary_name": "mosquitto-dev",
            "binary_version": "2.0.11-1ubuntu1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-5632.json"