In etcd before versions 3.3.23 and 3.4.10, the etcd gateway is a simple TCP proxy to allow for basic service discovery and access. However, it is possible to include the gateway address as an endpoint. This results in a denial of service, since the endpoint can become stuck in a loop of requesting itself until there are no more available file descriptors to accept connections on the gateway.
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "medium", "binaries": [ { "etcd-server-dbgsym": "3.2.17+dfsg-1ubuntu0.1+esm1", "golang-etcd-server-dev": "3.2.17+dfsg-1ubuntu0.1+esm1", "etcd": "3.2.17+dfsg-1ubuntu0.1+esm1", "etcd-client-dbgsym": "3.2.17+dfsg-1ubuntu0.1+esm1", "etcd-server": "3.2.17+dfsg-1ubuntu0.1+esm1", "etcd-client": "3.2.17+dfsg-1ubuntu0.1+esm1" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "etcd-server-dbgsym": "3.2.26+dfsg-6ubuntu0.1", "golang-etcd-server-dev": "3.2.26+dfsg-6ubuntu0.1", "etcd": "3.2.26+dfsg-6ubuntu0.1", "etcd-client-dbgsym": "3.2.26+dfsg-6ubuntu0.1", "etcd-server": "3.2.26+dfsg-6ubuntu0.1", "etcd-client": "3.2.26+dfsg-6ubuntu0.1" } ] }