CVE-2024-10525

CVE-2024-10525 concerns Eclipse Mosquitto. A crafted SUBACK packet with no reason codes could cause out-of-bounds memory access in libmosquitto when handling on_subscribe, affecting mosquitto_sub and mosquitto_rr clients. Affected range is from 1.3.2 through 2.0.18 per the CVE summary. Connected ...

CVE-2023-0809

Eclipse Mosquitto CVE-2023-0809 affects Mosquitto 2.0.x up to before 2.0.16, where memory is excessively allocated by malicious initial packets that are not CONNECT packets. Several connected advisories document a memory leak that can lead to broker unresponsiveness (notably CVE-2023-0809 alongsi...

CVE-2023-28366

CVE-2023-28366 affects the Eclipse Mosquitto broker (versions 1.3.2–2.x prior to 2.0.16). The issue is a memory leak caused by mishandling of EAGAIN from libc send when a client sends many QoS 2 messages with duplicate message IDs and the broker does not respond to PUBREC. This can enable remote ...

CVE-2019-11779

CVE-2019-11779 affects Eclipse Mosquitto versions 1.5.0–1.6.5 (inclusive). A crafted MQTT SUBSCRIBE packet with a topic containing about 65,400 or more '/' characters can trigger a stack overflow in the broker, causing a denial of service. Public references show that the root cause is handling of...

CVE-2021-34431

CVE-2021-34431 affects Eclipse Mosquitto 1.6–2.0.10. The issue is a memory leak in the broker triggered when an authenticated client that previously connected with MQTT v5 sends a crafted CONNECT message, leading to a potential denial of service. The connected documents confirm the vulnerability ...

CVE-2023-3592

Eclipse Mosquitto CVE-2023-3592 affects Mosquitto prior to 2.0.16, where a memory leak occurs when clients send v5 CONNECT packets with a will message containing invalid property types. This memory leak can lead to broker unresponsiveness/DoS. Remediation from related advisories indicates upgradi...

CVE-2019-11778

CVE-2019-11778 affects Eclipse Mosquitto 1.6.0–1.6.4. When an MQTT v5 client connects, and the will delay interval is longer than the session expiry interval, a use-after-free error may occur, potentially causing a crash in some situations. The connected Red Hat/SUSE and OSV entries reiterate the...

CVE-2018-12550

CVE-2018-12550 affects Eclipse Mosquitto 1.0–1.5.5 when an ACL file is configured but empty or only comments/blank lines, causing the broker to treat the file as defined and switch from a default deny to a default allow policy. Public disclosures in connected docs confirm the vulnerability behavi...

CVE-2018-12551

CVE-2018-12551 affects Eclipse Mosquitto 1.0–1.5.5 when a password file is used for authentication: malformed data in the file can be treated as a valid username (e.g., a blank line), allowing bypass of authentication. Other security measures remain unaffected, and users relying on mosquitto_pass...

CVE-2018-12546

The CVE describes a vulnerability in Eclipse Mosquitto where, for versions 1.0–1.5.5, a retained message published to a topic remains delivered to future subscribers after that client’s access to the topic is revoked, potentially enabling effects not allowed by normal access controls. This is a s...

CVE-2024-8376

CVE-2024-8376 affects Eclipse Mosquitto up to version 2.0.18a, where an attacker can trigger memory leaking, segmentation fault or heap-use-after-free by sending crafted sequences of MQTT packets (CONNECT, DISCONNECT, SUBSCRIBE, UNSUBSCRIBE, PUBLISH). Public documents consistently cite these symp...

CVE-2021-34434

In Eclipse Mosquitto, CVE-2021-34434 affects versions 2.0 to 2.0.11 when using the dynamic security plugin: if a client’s ability to subscribe is revoked while a durable client is offline, existing subscriptions for that client are not revoked. Multiple connected advisories confirm the issue and ...

CVE-2017-9868

CVE-2017-9868 affects Mosquitto

CVE-2017-7651

CVE-2017-7651 affects Eclipse Mosquitto 1.4.14, where an unauthenticated attacker can trigger a denial-of-service by exhausting memory via crafted CONNECT packets during the MQTT connection phase, potentially impacting the broker. Connected sources corroborate remote DoS risk and reference patche...

CVE-2021-34432

Eclipse Mosquitto vulnerability CVE-2021-34432 affects versions 2.07 and earlier, where a PUBLISH packet with a zero-length topic can crash the server. This can enable a denial-of-service condition as described in multiple sources, with IBM IBM App Connect Enterprise/Integration Bus noting the im...

CVE-2017-7650

CVE-2017-7650 affects Eclipse Mosquitto up to version 1.4.11 (before 1.4.12). The vulnerability arises from pattern-based ACLs that can be bypassed when clients set their username or client id to '#' or '+', allowing locally or remotely connected clients to access MQTT topics they should not be a...

CVE-2017-7653

The CVE-2017-7653 issue affects the Eclipse Mosquitto broker up to version 1.4.15, where the broker does not reject strings that are not valid UTF-8. A malicious client can trigger a denial of service by sending an invalid UTF-8 topic string, causing other clients that reject invalid UTF-8 to dis...

CVE-2017-7652

CVE-2017-7652 affects Eclipse Mosquitto (notably around version 1.4.14) where reloading configuration on SIGHUP can exhaust file descriptors/sockets, preventing opening the config file. Publicly documented impact includes potential configuration reload failures due to FD exhaustion. Remediation g...

CVE-2021-41039

CVE-2021-41039 affects Eclipse Mosquitto versions 1.6–2.0.11, where an MQTT v5 client sending a large number of user-property properties can cause excessive CPU usage, potentially leading to denial of service. Public sources confirm the vulnerability and note fixes in later package updates: Debia...

CVE-2017-7654

CVE-2017-7654 affects the Mosquitto MQTT broker (up to version 1.4.15). The issue is a memory-leak in the broker that can be triggered by unauthenticated clients sending crafted CONNECT packets, leading to a denial of service. Affected: Eclipse Mosquitto 1.4.15 and earlier. Impact: DoS of the bro...

CVE-2018-12543

CVE-2018-12543 affects Eclipse Mosquitto versions 1.5 through 1.5.2. When a message is published with a topic starting with ‘$’ but not ‘$SYS’ (e.g., ‘$test/test’), an assertion is triggered and Mosquitto exits. The issue is triggered during processing of such topics and is resolved in the 1.5.3 ...

CVE-2017-7655

CVE-2017-7655 affects the Eclipse Mosquitto broker/library (versions 1.0–1.4.15). The root cause is a Null Dereference in the Mosquitto library, which could cause crashes for applications using the library and lead to a denial of service. Public advisories note remediation via upgrading Mosquitto...

CVE-2024-3935

CVE-2024-3935 affects Eclipse Mosquitto: 2.0.0–2.0.18 expose a double-free crash when a broker with an outgoing bridge uses topic remapping and receives a crafted PUBLISH from a remote connection. Connected advisories confirm the issue across multiple distributions and show remediation through up...

CVE-2021-28166

Eclipse Mosquitto broker (versions 2.0.0–2.0.9) is vulnerable to a NULL pointer dereference when an authenticated client that previously connected with MQTT v5 sends a crafted CONNACK message. Affected component: broker handling CONNACK under MQTT v5. Impact as per sources: availability impact HI...

CVE-2023-5632

Eclipse Mosquitto contains a denial-of-service issue (CVE-2023-5632): when establishing a connection to the broker without sending data, an EPOLLOUT event is added, causing excessive CPU usage. Affected versions are Mosquitto before and including 2.0.5; the issue is fixed in 2.0.6. Several feeds ...

CVE-2018-20145

CVE-2018-20145: Eclipse Mosquitto 1.5.x before 1.5.5 is affected. When per_listener_settings is true and the default listener is used with an acl_file configured, the ACL file is ignored, constituting an ACL bypass risk. Affected software: mosquitto 1.5.x prior to 1.5.5. Root cause: default-liste...