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.
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{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "2.0.11-1ubuntu1.1", "binary_name": "libmosquitto-dev" }, { "binary_version": "2.0.11-1ubuntu1.1", "binary_name": "libmosquitto1" }, { "binary_version": "2.0.11-1ubuntu1.1", "binary_name": "libmosquitto1-dbgsym" }, { "binary_version": "2.0.11-1ubuntu1.1", "binary_name": "libmosquittopp-dev" }, { "binary_version": "2.0.11-1ubuntu1.1", "binary_name": "libmosquittopp1" }, { "binary_version": "2.0.11-1ubuntu1.1", "binary_name": "libmosquittopp1-dbgsym" }, { "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", "binary_name": "mosquitto-clients-dbgsym" }, { "binary_version": "2.0.11-1ubuntu1.1", "binary_name": "mosquitto-dbgsym" }, { "binary_version": "2.0.11-1ubuntu1.1", "binary_name": "mosquitto-dev" } ] }