[GHSA-8pgv-569h-w5rw] otelgrpc DoS vulnerability due to unbound cardinality metrics

[agmond]

Updates

• Affected products

Comments
The vulnerability first introduced in instrumentation/google.golang.org/grpc/otelgrpc/v0.37.0

Commit:
open-telemetry/opentelemetry-go-contrib@04c5dcb

See the new code inserted in instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go, line 342-348:

defer func(t time.Time) {
			elapsedTime := time.Since(t) / time.Millisecond
			attr = append(attr, semconv.RPCGRPCStatusCodeKey.Int64(int64(statusCode)))
			cfg.rpcServerDuration.Record(ctx, int64(elapsedTime), attr...)
		}(time.Now())

This is the code that has been later fixed in v0.46.0 (commit: open-telemetry/opentelemetry-go-contrib@b44dfc9), see lines 389-390.

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