The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused     remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to     PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function.
    (CVE-2023-28366)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0797 advisory.

    Red Hat Satellite is a system management solution that allows organizations     to configure and maintain their systems without the necessity to provide     public Internet access to their servers or other client systems. It     performs provisioning and configuration management of predefined standard     operating environments.

    Security fix(es):
    * CVE-2023-26049 (puppetserver): Cookie parsing of quoted values can exfiltrate values from other cookies
    * CVE-2023-26141 (rubygem-sidekiq): Denial of Service (DoS) in dashboard-charts
    * CVE-2023-36479 (puppetserver): Improper addition of quotation marks to user inputs in CgiServlet
    * CVE-2023-38545 (puppet-agent): Heap-based buffer overflow in the SOCKS5 proxy handshake
    * CVE-2023-40167 (puppetserver): Improper validation of HTTP/1 content-length
    * CVE-2023-40175 (rubygem-puma): HTTP request smuggling when parsing chunked transfer encoding bodies and     zero-length content-length headers
    * CVE-2023-4785 (rubygem-grpc): File descriptor exhaustion leads to denial of service
    * CVE-2023-0809, CVE-2023-28366, CVE-2023-3592 (mosquitto): Memory leak leads to unresponsive broker

    This update fixes the following bugs:
    2250347 - 'Sun, 11 Jun 2023 17:51:29 GMT' could not be parsed at index 0 at     java.time.format.DateTimeFormatter.parseResolved     2254974 - satellite-convert2rhel-toolkit install fails on latest rpm with `/usr/bin/bash:
    /usr/libexec/satellite-convert2rhel-appliance/action-install.sh: No such file or directory`     2255260 - 6.14 - satellite-convert2rhel-toolkit is part of the satellite module     2257321 - Request for UEFI Kickstart Provisioning to handle naming convention for VLAN tagged interfaces     of the format <parent_device>.<vlan_id> in addition to vlan<vlan_id>     2257324 - Generate applicability tasks fails with error ERROR: insert or update on table     katello_content_facet_errata violates foreign key constraint katello_content_facet_errata_ca_id     2257326 - Show failed resources in failed installation report     2257327 - Puppet reports without any messages don't get an origin     2257329 - Host registration fails with error Attached to can't be blank when the VLAN name includes     UPPERCASE letters     2257330 - default tuning profile leaves httpd MaxClients 150 which httpd raises a warning     2257331 - Registering host through load balancer causes REX not to know what capsule to choose for     'registered_through'     2257332 - Registration can't find any Capsules when their locations are not assigned to admin user     2257415 - Provisioning vm host fails with error Failed to attach ISO image to CDROM drive of instance     client.example.com: InvalidPowerState: The attempted operation cannot be performed in the current state     (Powered on).
    2260525 - [Improvement] RefreshRepos step in Capsule Sync to refresh just repos to sync     2262131 - Unable to sync library/busybox from gcr.io

    Users of Red Hat Satellite are advised to upgrade to these updated     packages, which fix these bugs.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:1061 advisory.

    Red Hat Satellite is a system management solution that allows organizations to     configure and maintain their systems without the necessity to provide public     Internet access to their servers or other client systems. It performs     provisioning and configuration management of predefined standard operating     environments.

    Security Fix(es):

    * satellite: Blind SSRF via Referer header (CVE-2022-4130)

    * mosquitto: memory leak leads to unresponsive broker (CVE-2023-0809, CVE-2023-28366, CVE-2023-3592)

    * foreman: World readable file containing secrets (CVE-2023-4886)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * Long running postgres threads during content-export (BZ#2257299)

    * After upstream repo switched to zst compression, Satellite 6.12.5.1 unable to sync (BZ#2257300)

    * Actions::ForemanLeapp::PreupgradeJob fails with null value in column preupgrade_report_id violates     not-null constraint when run with non-admin user (BZ#2257302)

    * Puppet reports without any messages don't get an origin (BZ#2257314)

    * Provisioning vm host fails with error Failed to attach ISO image to CDROM drive of instance     client.example.com: InvalidPowerState: The attempted operation cannot be performed in the current state     (Powered on). (BZ#2257316)

    * [Improvement] RefreshRepos step in Capsule Sync to refresh just repos to sync (BZ#2260526)

    * Support Satellite Clone running on Python 3.12 (BZ#2264354)

    * Support Satellite Ansible Collection running on Python 3.12 (BZ#2264918)

    * Unable to sync library/busybox from gcr.io (BZ#2265149)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-202401-09 (Eclipse Mosquitto: Multiple Vulnerabilities)

  - In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not     CONNECT packets. (CVE-2023-0809)

  - In Mosquitto before 2.0.16, a memory leak occurs when clients send v5 CONNECT packets with a will message     that contains invalid property types. (CVE-2023-3592)

  - The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused     remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to     PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function.
    (CVE-2023-28366)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 ESM / 22.04 LTS / 23.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6492-1 advisory.

    Kathrin Kleinhammer discovered that Mosquitto incorrectly handled certain inputs. If a user or an     automated system were provided with a specially crafted input, a remote attacker could possibly use this     issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-34431)

    Zhanxiang Song discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated     system were provided with a specially crafted input, a remote attacker could possibly use this issue to     cause an authorisation bypass. This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04.
    (CVE-2021-34434)

    Zhanxiang Song, Bin Yuan, DeQing Zou, and Hai Jin discovered that Mosquitto incorrectly handled certain     inputs. If a user or an automated system were provided with a specially crafted input, a remote attacker     could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS and     Ubuntu 22.04 LTS. (CVE-2021-41039)

    Zhengjie Du discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system     were provided with a specially crafted input file, a remote attacker could possibly use this issue to     cause a denial of service. (CVE-2023-0809)

    It was discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system were     provided with a specially crafted input, a remote attacker could possibly use this issue to cause a denial     of service. (CVE-2023-3592)

    Mischa Bachmann discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated     system were provided with a specially crafted input, a remote attacker could possibly use this issue to     cause a denial of service. This issue was only fixed in Ubuntu 22.04 LTS and Ubuntu 23.04.
    (CVE-2023-28366)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-9adc4be8b0 advisory.

    2.0.17

    Broker:

    * Fix `max_queued_messages 0` stopping clients from receiving messages
    * Fix `max_inflight_messages` not being set correctly.

    Apps:

    * Fix `mosquitto_passwd -U` backup file creation.


    2.0.16

    Security:

    * CVE-2023-28366: Fix memory leak in broker when clients send multiple QoS 2 messages with the same     message ID, but then never respond to the PUBREC commands.
    * CVE-2023-0809: Fix excessive memory being allocated based on malicious initial packets that are not     CONNECT packets.
    * CVE-2023-3592: Fix memory leak when clients send v5 CONNECT packets with a will message that contains     invalid property types.
    * Broker will now reject Will messages that attempt to publish to $CONTROL/.
    * Broker now validates usernames provided in a TLS certificate or TLS-PSK identity are valid UTF-8.
    * Fix potential crash when loading invalid persistence file.
    * Library will no longer allow single level wildcard certificates, e.g. *.com

    Broker:

    * Fix $SYS messages being expired after 60 seconds and hence unchanged values disappearing.
    * Fix some retained topic memory not being cleared immediately after used.
    * Fix error handling related to the `bind_interface` option.
    * Fix std* files not being redirected when daemonising, when built with assertions removed.
    * Fix default settings incorrectly allowing TLS v1.1.
    * Use line buffered mode for stdout. Closes #2354.
    * Fix bridges with non-matching cleansession/local_cleansession being expired on start after restoring     from persistence.
    * Fix connections being limited to 2048 on Windows. The limit is now 8192, where supported.
    * Broker will log warnings if sensitive files are world readable/writable, or if the owner/group is not     the same as the user/group the broker is running as. In future versions the broker will refuse to open     these files.
    * mosquitto_memcmp_const is now more constant time.
    * Only register with DLT if DLT logging is enabled.
    * Fix any possible case where a json string might be incorrectly loaded. This could have caused a crash if     a textname or textdescription field of a role was not a string, when loading the dynsec config from file     only.
    * Dynsec plugin will not allow duplicate clients/groups/roles when loading config from file, which matches     the behaviour for when creating them.
    * Fix heap overflow when reading corrupt config with log_dest file.

    Client library:

    * Use CLOCK_BOOTTIME when available, to keep track of time. This solves the problem of the client OS     sleeping and the client hence not being able to calculate the actual time for keepalive purposes.
    * Fix default settings incorrectly allowing TLS v1.1.
    * Fix high CPU use on slow TLS connect.

    Clients:

    * Fix incorrect topic-alias property value in mosquitto_sub json output.
    * Fix confusing message on TLS certificate verification.

    Apps:

    * mosquitto_passwd uses mkstemp() for backup files.
    * `mosquitto_ctrl dynsec init` will refuse to overwrite an existing file, without a race-condition.



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5511 advisory.

    Several security vulnerabilities have been discovered in mosquitto, a MQTT compatible message broker,     which may be abused for a denial of service attack. CVE-2021-34434 In Eclipse Mosquitto when using the     dynamic security plugin, if the ability for a client to make subscriptions on a topic is revoked when a     durable client is offline, then existing subscriptions for that client are not revoked. CVE-2023-0809 Fix     excessive memory being allocated based on malicious initial packets that are not CONNECT packets.
    CVE-2023-3592 Fix memory leak when clients send v5 CONNECT packets with a will message that contains     invalid property types. CVE-2023-28366 The broker in Eclipse Mosquitto has a memory leak that can be     abused remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond     to PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function. Additionally     CVE-2021-41039 has been fixed for Debian 11 Bullseye. CVE-2021-41039 An MQTT v5 client connecting with a     large number of user-property properties could cause excessive CPU usage, leading to a loss of performance     and possible denial of service. For the oldstable distribution (bullseye), these problems have been fixed     in version 2.0.11-1+deb11u1. For the stable distribution (bookworm), these problems have been fixed in     version 2.0.11-1.2+deb12u1. We recommend that you upgrade your mosquitto packages. For the detailed     security status of mosquitto please refer to its security tracker page at: https://security-     tracker.debian.org/tracker/mosquitto

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 38 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2023-6a87c003c4 advisory.

    2.0.17

    Broker:

    * Fix `max_queued_messages 0` stopping clients from receiving messages
    * Fix `max_inflight_messages` not being set correctly.

    Apps:

    * Fix `mosquitto_passwd -U` backup file creation.


    2.0.16

    Security:

    * CVE-2023-28366: Fix memory leak in broker when clients send multiple QoS 2 messages with the same     message ID, but then never respond to the PUBREC commands.
    * CVE-2023-0809: Fix excessive memory being allocated based on malicious initial packets that are not     CONNECT packets.
    * CVE-2023-3592: Fix memory leak when clients send v5 CONNECT packets with a will message that contains     invalid property types.
    * Broker will now reject Will messages that attempt to publish to $CONTROL/.
    * Broker now validates usernames provided in a TLS certificate or TLS-PSK identity are valid UTF-8.
    * Fix potential crash when loading invalid persistence file.
    * Library will no longer allow single level wildcard certificates, e.g. *.com

    Broker:

    * Fix $SYS messages being expired after 60 seconds and hence unchanged values disappearing.
    * Fix some retained topic memory not being cleared immediately after used.
    * Fix error handling related to the `bind_interface` option.
    * Fix std* files not being redirected when daemonising, when built with assertions removed.
    * Fix default settings incorrectly allowing TLS v1.1.
    * Use line buffered mode for stdout. Closes #2354.
    * Fix bridges with non-matching cleansession/local_cleansession being expired on start after restoring     from persistence.
    * Fix connections being limited to 2048 on Windows. The limit is now 8192, where supported.
    * Broker will log warnings if sensitive files are world readable/writable, or if the owner/group is not     the same as the user/group the broker is running as. In future versions the broker will refuse to open     these files.
    * mosquitto_memcmp_const is now more constant time.
    * Only register with DLT if DLT logging is enabled.
    * Fix any possible case where a json string might be incorrectly loaded. This could have caused a crash if     a textname or textdescription field of a role was not a string, when loading the dynsec config from file     only.
    * Dynsec plugin will not allow duplicate clients/groups/roles when loading config from file, which matches     the behaviour for when creating them.
    * Fix heap overflow when reading corrupt config with log_dest file.

    Client library:

    * Use CLOCK_BOOTTIME when available, to keep track of time. This solves the problem of the client OS     sleeping and the client hence not being able to calculate the actual time for keepalive purposes.
    * Fix default settings incorrectly allowing TLS v1.1.
    * Fix high CPU use on slow TLS connect.

    Clients:

    * Fix incorrect topic-alias property value in mosquitto_sub json output.
    * Fix confusing message on TLS certificate verification.

    Apps:

    * mosquitto_passwd uses mkstemp() for backup files.
    * `mosquitto_ctrl dynsec init` will refuse to overwrite an existing file, without a race-condition.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-e7ed15ab9e advisory.

    2.0.17

    Broker:

    * Fix `max_queued_messages 0` stopping clients from receiving messages
    * Fix `max_inflight_messages` not being set correctly.

    Apps:

    * Fix `mosquitto_passwd -U` backup file creation.


    2.0.16

    Security:

    * CVE-2023-28366: Fix memory leak in broker when clients send multiple QoS 2 messages with the same     message ID, but then never respond to the PUBREC commands.
    * CVE-2023-0809: Fix excessive memory being allocated based on malicious initial packets that are not     CONNECT packets.
    * CVE-2023-3592: Fix memory leak when clients send v5 CONNECT packets with a will message that contains     invalid property types.
    * Broker will now reject Will messages that attempt to publish to $CONTROL/.
    * Broker now validates usernames provided in a TLS certificate or TLS-PSK identity are valid UTF-8.
    * Fix potential crash when loading invalid persistence file.
    * Library will no longer allow single level wildcard certificates, e.g. *.com

    Broker:

    * Fix $SYS messages being expired after 60 seconds and hence unchanged values disappearing.
    * Fix some retained topic memory not being cleared immediately after used.
    * Fix error handling related to the `bind_interface` option.
    * Fix std* files not being redirected when daemonising, when built with assertions removed.
    * Fix default settings incorrectly allowing TLS v1.1.
    * Use line buffered mode for stdout. Closes #2354.
    * Fix bridges with non-matching cleansession/local_cleansession being expired on start after restoring     from persistence.
    * Fix connections being limited to 2048 on Windows. The limit is now 8192, where supported.
    * Broker will log warnings if sensitive files are world readable/writable, or if the owner/group is not     the same as the user/group the broker is running as. In future versions the broker will refuse to open     these files.
    * mosquitto_memcmp_const is now more constant time.
    * Only register with DLT if DLT logging is enabled.
    * Fix any possible case where a json string might be incorrectly loaded. This could have caused a crash if     a textname or textdescription field of a role was not a string, when loading the dynsec config from file     only.
    * Dynsec plugin will not allow duplicate clients/groups/roles when loading config from file, which matches     the behaviour for when creating them.
    * Fix heap overflow when reading corrupt config with log_dest file.

    Client library:

    * Use CLOCK_BOOTTIME when available, to keep track of time. This solves the problem of the client OS     sleeping and the client hence not being able to calculate the actual time for keepalive purposes.
    * Fix default settings incorrectly allowing TLS v1.1.
    * Fix high CPU use on slow TLS connect.

    Clients:

    * Fix incorrect topic-alias property value in mosquitto_sub json output.
    * Fix confusing message on TLS certificate verification.

    Apps:

    * mosquitto_passwd uses mkstemp() for backup files.
    * `mosquitto_ctrl dynsec init` will refuse to overwrite an existing file, without a race-condition.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
257694	Linux Distros Unpatched Vulnerability : CVE-2023-28366	Nessus	Misc.	high
194396	RHEL 8 : Satellite 6.14.2 Async Security Update (Important) (RHSA-2024:0797)	Nessus	Red Hat Local Security Checks	critical
194360	RHEL 8 : Red Hat Satellite 6 (RHSA-2024:1061)	Nessus	Red Hat Local Security Checks	critical
187729	GLSA-202401-09 : Eclipse Mosquitto: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	high
186038	Ubuntu 20.04 ESM / 22.04 LTS / 23.04 : Mosquitto vulnerabilities (USN-6492-1)	Nessus	Ubuntu Local Security Checks	medium
185219	Fedora 39 : mosquitto (2023-9adc4be8b0)	Nessus	Fedora Local Security Checks	critical
182418	Debian DSA-5511-1 : mosquitto - security update	Nessus	Debian Local Security Checks	critical
180438	Fedora 38 : libwebsockets / mosquitto (2023-6a87c003c4)	Nessus	Fedora Local Security Checks	critical
180432	Fedora 37 : mosquitto (2023-e7ed15ab9e)	Nessus	Fedora Local Security Checks	critical

Detections

Analytics

CVE-2023-28366

high

Tenable Plugins

high

critical

critical

high

medium

critical

critical

critical

critical