An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
{
"cpes": [
"cpe:2.3:a:envoyproxy:envoy:1.14.6:*:*:*:*:*:*:*",
"cpe:2.3:a:envoyproxy:envoy:1.15.3:*:*:*:*:*:*:*",
"cpe:2.3:a:envoyproxy:envoy:1.16.2:*:*:*:*:*:*:*",
"cpe:2.3:a:envoyproxy:envoy:1.17.1:*:*:*:*:*:*:*",
"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*"
],
"severity": "High"
}