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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| go.etcd.io/etcd(Go) | 3.4.0-rc.0 | 3.4.10 | N/A |
| go.etcd.io/etcd(Go) | 0 | 3.3.23 | N/A |
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