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# This test ensures that h2 requests with invalid pseudo-headers are properly
# rejected. Also, the host header must be ignored if authority is present. This
# is necessary to avoid http/2 desync attacks through haproxy as described here
# https://portswigger.net/research/http2
varnishtest "h2 desync attacks"
feature ignore_unknown_macro
server s1 {
rxreq
expect req.http.host == "hostname"
txresp
} -start
# haproxy frontend
haproxy hap -conf {
defaults
mode http
listen feSrvH1
bind "fd@${feSrvH1}"
http-request return status 200
listen feSrvH2
bind "fd@${feSrvH2}" proto h2
http-request return status 200
listen fe1
bind "fd@${fe1}" proto h2
server srv-hapSrv "${hap_feSrvH1_addr}:${hap_feSrvH1_port}"
listen fe2
bind "fd@${fe2}" proto h2
server srv-hapSrv "${hap_feSrvH2_addr}:${hap_feSrvH2_port}" proto h2
listen fe3
bind "fd@${fe3}" proto h2
server s1 "${s1_addr}:${s1_port}"
} -start
# valid request
client c1 -connect ${hap_fe1_sock} {
txpri
stream 0 {
txsettings
rxsettings
txsettings -ack
rxsettings
expect settings.ack == true
} -run
stream 1 {
txreq \
-method "GET" \
-scheme "http" \
-url "/"
rxresp
expect resp.status == 200
} -run
} -run
# valid request
client c2 -connect ${hap_fe2_sock} {
txpri
stream 0 {
txsettings
rxsettings
txsettings -ack
rxsettings
expect settings.ack == true
} -run
stream 1 {
txreq \
-method "GET" \
-scheme "http" \
-url "/"
rxresp
expect resp.status == 200
} -run
} -run
# invalid path
client c3-path -connect ${hap_fe1_sock} {
txpri
stream 0 {
txsettings
rxsettings
txsettings -ack
rxsettings
expect settings.ack == true
} -run
stream 1 {
txreq \
-method "GET" \
-scheme "http" \
-url "hello-world"
rxrst
} -run
} -run
# invalid scheme
client c4-scheme -connect ${hap_fe1_sock} {
txpri
stream 0 {
txsettings
rxsettings
txsettings -ack
rxsettings
expect settings.ack == true
} -run
stream 1 {
txreq \
-method "GET" \
-scheme "http://localhost/?" \
-url "/"
rxresp
expect resp.status == 400
} -run
} -run
# invalid method
client c5-method -connect ${hap_fe2_sock} {
txpri
stream 0 {
txsettings
rxsettings
txsettings -ack
rxsettings
expect settings.ack == true
} -run
stream 1 {
txreq \
-method "GET?" \
-scheme "http" \
-url "/"
rxresp
expect resp.status == 400
} -run
} -run
# different authority and host headers
# in this case, host should be ignored in favor of the authority
client c6-host-authority -connect ${hap_fe3_sock} {
txpri
stream 0 {
txsettings
rxsettings
txsettings -ack
rxsettings
expect settings.ack == true
} -run
stream 1 {
txreq \
-method "GET" \
-scheme "http" \
-url "/" \
-hdr ":authority" "hostname" \
-hdr "host" "other_host"
} -run
} -run
server s1 -wait
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