secengjeff/rapidresetclientTool for testing mitigations and exposure to Rapid Reset DDoS (CVE-2023-44487)
Rapid Reset Client is a tool for testing mitigations and exposure to CVE-2023-44487 (Rapid Reset DDoS attack vector). It implements a minimal HTTP/2 client that opens a single TCP socket, negotiates TLS, ignores the certificate, and exchanges SETTINGS frames. The client then sends rapid HEADERS frames followed by RST_STREAM frames. It monitors for (but does not handle) server frames after initial setup, other than to send to stdout. This functionality is easily removed from source if it's too annoying.
Tested on go1.21.3 on arm64.
git clone https://github.com/secengjeff/rapidresetclient.git
cd rapidresetclient
go get golang.org/x/net/http2
go get golang.org/x/net/http2/hpack
go build -o rapidresetclient
requests: Number of requests to send (default is 5)
url: Server URL (default is https://localhost:443)
wait: Wait time in milliseconds between starting workers (default is 0)
delay: Delay in milliseconds between sending HEADERS and RST_STREAM frames (default is 0)
concurrency: Maximum number of concurrent workers (default is 0)
Send 10 HTTP/2 requests (HEADERS and RST_STREAM frames) over a single connection to https://example.com using 5 workers, a 10 ms delay between sending HEADERS and RST_STREAM frames, and a wait time of 100 ms between each invocation.
./rapidresetclient -requests=10 -url https://example.com -wait=100 -delay=10 -concurrency=5
http2 - Package that exposes low-level HTTP/2 primitives
http2/hpack - HTTP/2 header compression package
See also the list of contributors
This project is licensed under the Apache License - see the LICENSE file for details
This work is based on the initial analysis of CVE-2023-44487 by Juho Snellman and Daniele Iamartino at Google.