haproxy/reg-tests/http-messaging/h1_to_h1.vtc

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varnishtest "HTTP request tests: H1 to H1 (HTX mode supported only for HAProxy >= 1.9)"
# Run it with HAPROXY_PROGRAM=$PWD/haproxy varnishtest -l -k -t 1 "$1"
feature ignore_unknown_macro
server s1 {
##
## Handle GET requests
##
rxreq
expect req.bodylen == 0
expect req.body == ""
txresp \
-status 200 \
-body "response 1"
rxreq
expect req.bodylen == 0
expect req.body == ""
txresp \
-status 200 \
-body "response 2"
rxreq
expect req.bodylen == 38
expect req.body == "this must be delivered, like it or not"
txresp \
-status 200 \
-body "response 3"
rxreq
expect req.bodylen == 0
expect req.body == ""
txresp \
-status 200 \
-body "response 4"
accept
##
## Handle HEAD requests
##
rxreq
expect req.bodylen == 0
expect req.body == ""
txresp \
-status 200 \
-body "response 1"
accept
rxreq
expect req.bodylen == 0
expect req.body == ""
txresp \
-status 200 \
-body "response 2"
accept
rxreq
expect req.bodylen == 38
expect req.body == "this must be delivered, like it or not"
txresp \
-status 200 \
-body "response 3"
accept
rxreq
expect req.bodylen == 0
expect req.body == ""
txresp \
-status 200 \
-body "response 4"
accept
##
## Handle POST requests
##
# POST request without body
rxreq
expect req.bodylen == 0
expect req.body == ""
txresp \
-status 200 \
-body "response 1"
# POST request without body
rxreq
expect req.bodylen == 0
expect req.body == ""
txresp \
-status 200 \
-body "response 2"
# POST request with a body
rxreq
expect req.bodylen == 12
expect req.body == "this is sent"
txresp \
-status 200 \
-body "response 3"
# POST request without body
rxreq
expect req.bodylen == 0
expect req.body == ""
txresp \
-status 200 \
-body "response 4"
} -repeat 3 -start
haproxy h1 -conf {
global
# WT: limit false-positives causing "HTTP header incomplete" due to
# idle server connections being randomly used and randomly expiring
# under us.
tune.idle-pool.shared off
defaults
mode http
timeout connect "${HAPROXY_TEST_TIMEOUT-5s}"
timeout client "${HAPROXY_TEST_TIMEOUT-5s}"
timeout server "${HAPROXY_TEST_TIMEOUT-5s}"
listen feh1
bind "fd@${feh1}"
#bind "fd@${feh2}" proto h2
server s1 ${s1_addr}:${s1_port}
} -start
# GET requests
client c1h1 -connect ${h1_feh1_sock} {
# first request is valid
txreq \
-req "GET" \
-url "/test1.html"
rxresp
expect resp.status == 200
expect resp.body == "response 1"
# second request is valid and advertises C-L:0
txreq \
-req "GET" \
-url "/test2.html" \
-hdr "content-length: 0"
rxresp
expect resp.status == 200
expect resp.body == "response 2"
# third request sends a body with a GET
txreq \
-req "GET" \
-url "/test3.html" \
-body "this must be delivered, like it or not"
rxresp
expect resp.status == 200
expect resp.body == "response 3"
# fourth request is valid and advertises C-L:0, and close, and is
# followed by a string "this is not sent\r\n\r\n" which must be
# dropped.
txreq \
-req "GET" \
-url "/test4.html" \
-hdr "content-length: 0" \
-hdr "connection: close"
# "this is not sent"
sendhex "74787973207973206E6F742073656E740D0A0D0A"
rxresp
expect resp.status == 200
expect resp.body == "response 4"
# the connection is expected to be closed and no more response must
# arrive here.
expect_close
} -run
# HEAD requests
# Note: for now they fail with varnishtest, which expects the amount of
# data advertised in the content-length response.
client c2h1 -connect ${h1_feh1_sock} {
# first request is valid
txreq \
-req "HEAD" \
-url "/test11.html"
rxresp
expect resp.status == 200
expect resp.body == ""
# second request is valid and advertises C-L:0
txreq \
-req "HEAD" \
-url "/test12.html" \
-hdr "content-length: 0"
rxresp
expect resp.status == 200
expect resp.body == ""
# third request sends a body with a HEAD
txreq \
-req "HEAD" \
-url "/test13.html" \
-body "this must be delivered, like it or not"
rxresp
expect resp.status == 200
expect resp.body == ""
# fourth request is valid and advertises C-L:0, and close, and is
# followed by a string "this is not sent\r\n\r\n" which must be
# dropped.
txreq \
-req "HEAD" \
-url "/test14.html" \
-hdr "content-length: 0" \
-hdr "connection: close"
# "this is not sent"
sendhex "74787973207973206E6F742073656E740D0A0D0A"
rxresp
expect resp.status == 200
expect resp.body == ""
# the connection is expected to be closed and no more response must
# arrive here.
expect_close
} -run
client c3h1 -connect ${h1_feh1_sock} {
# first request is valid
txreq \
-req "POST" \
-url "/test21.html"
rxresp
expect resp.status == 200
expect resp.body == "response 1"
# second request is valid and advertises C-L:0
txreq \
-req "POST" \
-url "/test22.html" \
-hdr "content-length: 0"
rxresp
expect resp.status == 200
expect resp.body == "response 2"
# third request is valid and advertises (and sends) some contents
txreq \
-req "POST" \
-url "/test23.html" \
-body "this is sent"
rxresp
expect resp.status == 200
expect resp.body == "response 3"
# fourth request is valid and advertises C-L:0, and close, and is
# followed by a string "this is not sent\r\n\r\n" which must be
# dropped.
txreq \
-req "POST" \
-url "/test24.html" \
-hdr "content-length: 0" \
-hdr "connection: close"
# "this is not sent"
sendhex "74787973207973206E6F742073656E740D0A0D0A"
rxresp
expect resp.status == 200
expect resp.body == "response 4"
# the connection is expected to be closed and no more response must
# arrive here.
expect_close
} -run
BUG/MAJOR: http: reject any empty content-length header value The content-length header parser has its dedicated function, in order to take extreme care about invalid, unparsable, or conflicting values. But there's a corner case in it, by which it stops comparing values when reaching the end of the header. This has for a side effect that an empty value or a value that ends with a comma does not deserve further analysis, and it acts as if the header was absent. While this is not necessarily a problem for the value ending with a comma as it will be cause a header folding and will disappear, it is a problem for the first isolated empty header because this one will not be recontructed when next ones are seen, and will be passed as-is to the backend server. A vulnerable HTTP/1 server hosted behind haproxy that would just use this first value as "0" and ignore the valid one would then not be protected by haproxy and could be attacked this way, taking the payload for an extra request. In field the risk depends on the server. Most commonly used servers already have safe content-length parsers, but users relying on haproxy to protect a known-vulnerable server might be at risk (and the risk of a bug even in a reputable server should never be dismissed). A configuration-based work-around consists in adding the following rule in the frontend, to explicitly reject requests featuring an empty content-length header that would have not be folded into an existing one: http-request deny if { hdr_len(content-length) 0 } The real fix consists in adjusting the parser so that it always expects a value at the beginning of the header or after a comma. It will now reject requests and responses having empty values anywhere in the C-L header. This needs to be backported to all supported versions. Note that the modification was made to functions h1_parse_cont_len_header() and http_parse_cont_len_header(). Prior to 2.8 the latter was in h2_parse_cont_len_header(). One day the two should be refused but the former is also used by Lua. The HTTP messaging reg-tests were completed to test these cases. Thanks to Ben Kallus of Dartmouth College and Narf Industries for reporting this! (this is in GH #2237).
2023-08-09 06:32:48 +00:00
client c4h1 -connect ${h1_feh1_sock} {
# this request is invalid and advertises an invalid C-L ending with an
# empty value, which results in a stream error.
txreq \
-req "GET" \
-url "/test31.html" \
-hdr "content-length: 0," \
-hdr "connection: close"
rxresp
expect resp.status == 400
expect_close
} -run
client c5h1 -connect ${h1_feh1_sock} {
# this request is invalid and advertises an empty C-L, which results
# in a stream error.
txreq \
-req "GET" \
-url "/test41.html" \
-hdr "content-length:" \
-hdr "connection: close"
rxresp
expect resp.status == 400
expect_close
} -run