CVE-2023-0809

mediumpriority · track · 21EPSS 0.007 · 53 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.71% (53rd) EPSS
CVSS 5.3 · medium
Is it mine?
58 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-23

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

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedmosquitto-0:2.0.17-1.el8sat.src as a component of Red Hat Satellite 6.13 for RHEL 8redhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For detailed instructions how to apply this update, refer to: https://access.redhat.com/documentation/en-us/red_hat_satellite/6.6/html/upgrading_and_updating_red_hat_satellite/updating_satellite_server_capsule_server_and_content_hosts

    https://access.redhat.com/errata/RHSA-2024:1061
  • Fixedmosquitto-0:2.0.17-1.el8sat.x86_64 as a component of Red Hat Satellite 6.13 for RHEL 8redhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For detailed instructions how to apply this update, refer to: https://access.redhat.com/documentation/en-us/red_hat_satellite/6.6/html/upgrading_and_updating_red_hat_satellite/updating_satellite_server_capsule_server_and_content_hosts

    https://access.redhat.com/errata/RHSA-2024:1061
  • Fixedmosquitto-debuginfo-0:2.0.17-1.el8sat.x86_64 as a component of Red Hat Satellite 6.13 for RHEL 8redhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For detailed instructions how to apply this update, refer to: https://access.redhat.com/documentation/en-us/red_hat_satellite/6.6/html/upgrading_and_updating_red_hat_satellite/updating_satellite_server_capsule_server_and_content_hosts

    https://access.redhat.com/errata/RHSA-2024:1061
  • Fixedmosquitto-debugsource-0:2.0.17-1.el8sat.x86_64 as a component of Red Hat Satellite 6.13 for RHEL 8redhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For detailed instructions how to apply this update, refer to: https://access.redhat.com/documentation/en-us/red_hat_satellite/6.6/html/upgrading_and_updating_red_hat_satellite/updating_satellite_server_capsule_server_and_content_hosts

    https://access.redhat.com/errata/RHSA-2024:1061
02

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.5

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 1.4
v3.15.8mediumAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Lsecondary · ENISA EU
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Lsecondary · emo@eclipse.orgexploitability 3.9 · impact 1.4
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · SICK PSIRT DE
v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Red Hat Product Security US
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USprimaryCWE-401USCWE-770USCWE-770USCWE-789US
05

affected products (58)

Products and version ranges known to be affected.

showing 20 of 58
06

advisories (3)

Vendor and ecosystem advisories describing this.

  • RHSA-2024:1061Red Hat Security Advisory: Red Hat Satellite 6 security and bug fix update2024-02-29csaf · redhat_csafUS

    An update is now available for Red Hat Satellite 6.13 for RHEL 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • SCA-2025-0006Vulnerability affecting picoScan and multiScan2025-04-28csaf · sick_psirtDE

    SICK has identified a Denial of Service vulnerability (CVE-2025-32472) in picoScan and multiScan, which can cause the web page to become unresponsive. Due to their architectural design, these products are not affected by the other vulnerabilities listed in this advisory. Currently SICK is not aware of any public exploits specifically targeting the vulnerability. SICK recommends applying the mitigation for CVE-2025-32472.

  • WID-SEC-W-2023-2724IBM Integration Bus: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2023-10-22csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM Integration Bus ausnutzen, um einen Denial of Service Angriff durchzuführen.

07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundnvdredhat_csafsick_psirtNVDCVE.orgMITRE
published 2023-10-02modified 2026-06-17
10

references (6)

External citations — patches, advisories, analysis.

scry

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