GHSA-9wmc-rg4h-28wv — github.com/kumahq/kuma affected by CVE-2023-44487

Quick fix

GHSA-9wmc-rg4h-28wv — github.com/kumahq/kuma: upgrade to the fixed version with the command below.

go get github.com/kumahq/kuma@v2.4.3

Details

### Impact Envoy and Go HTTP/2 protocol stack is vulnerable to the "Rapid Reset" class of exploits, which send a sequence of HEADERS frames optionally followed by RST_STREAM frames.

This can be exercised if you use the builtin gateway and receive untrusted http2 traffic.

### Patches

https://github.com/kumahq/kuma/pull/8023 https://github.com/kumahq/kuma/pull/8001 https://github.com/kumahq/kuma/pull/8034

### Workarounds Disable http2 on the gateway listener with a MeshProxyPatch or ProxyTemplate.

### References https://github.com/advisories/GHSA-qppj-fm5r-hxr3 https://github.com/golang/go/issues/63417 https://github.com/envoyproxy/envoy/security/advisories/GHSA-jhv4-f7mr-xx76 https://cloud.google.com/blog/products/identity-security/how-it-works-the-novel-http2-rapid-reset-ddos-attack https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/?sf269548684=1 https://www.envoyproxy.io/docs/envoy/latest/configuration/best_practices/edge