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323 lines
9.5 KiB
323 lines
9.5 KiB
6 years ago
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From e6968d1d220891230bcca5340bfd364183ceaa31 Mon Sep 17 00:00:00 2001
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From: Daniel Stenberg <daniel@haxx.se>
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Date: Fri, 19 Jan 2018 13:19:25 +0100
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Subject: [PATCH] http: prevent custom Authorization headers in redirects
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... unless CURLOPT_UNRESTRICTED_AUTH is set to allow them. This matches how
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curl already handles Authorization headers created internally.
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Note: this changes behavior slightly, for the sake of reducing mistakes.
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Added test 317 and 318 to verify.
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Reported-by: Craig de Stigter
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Bug: https://curl.haxx.se/docs/adv_2018-b3bf.html
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Upstream-commit: af32cd3859336ab963591ca0df9b1e33a7ee066b
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Signed-off-by: Kamil Dudka <kdudka@redhat.com>
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---
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docs/libcurl/curl_easy_setopt.3 | 10 +++++
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lib/http.c | 10 ++++-
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lib/url.c | 2 +-
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lib/urldata.h | 2 +-
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tests/data/Makefile.am | 3 +-
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tests/data/test317 | 94 ++++++++++++++++++++++++++++++++++++++++
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tests/data/test318 | 95 +++++++++++++++++++++++++++++++++++++++++
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7 files changed, 212 insertions(+), 4 deletions(-)
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create mode 100644 tests/data/test317
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create mode 100644 tests/data/test318
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diff --git a/docs/libcurl/curl_easy_setopt.3 b/docs/libcurl/curl_easy_setopt.3
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index 4ce8207..cbebfba 100644
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--- a/docs/libcurl/curl_easy_setopt.3
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+++ b/docs/libcurl/curl_easy_setopt.3
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@@ -67,6 +67,16 @@ this when you debug/report problems. Another neat option for debugging is the
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A parameter set to 1 tells the library to include the header in the body
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output. This is only relevant for protocols that actually have headers
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preceding the data (like HTTP).
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+
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+Custom headers are sent in all requests done by the easy handles, which
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+implies that if you tell libcurl to follow redirects
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+(\fICURLOPT_FOLLOWLOCATION(3)\fP), the same set of custom headers will be sent
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+in the subsequent request. Redirects can of course go to other hosts and thus
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+those servers will get all the contents of your custom headers too.
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+
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+Starting in 7.58.0, libcurl will specifically prevent "Authorization:" headers
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+from being sent to other hosts than the first used one, unless specifically
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+permitted with the \fICURLOPT_UNRESTRICTED_AUTH(3)\fP option.
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.IP CURLOPT_NOPROGRESS
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Pass a long. If set to 1, it tells the library to shut off the progress meter
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completely. It will also prevent the \fICURLOPT_PROGRESSFUNCTION\fP from
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diff --git a/lib/http.c b/lib/http.c
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index b73e58c..c15208d 100644
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--- a/lib/http.c
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+++ b/lib/http.c
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@@ -666,7 +666,7 @@ Curl_http_output_auth(struct connectdata *conn,
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if(!data->state.this_is_a_follow ||
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conn->bits.netrc ||
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!data->state.first_host ||
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- data->set.http_disable_hostname_check_before_authentication ||
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+ data->set.allow_auth_to_other_hosts ||
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Curl_raw_equal(data->state.first_host, conn->host.name)) {
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result = output_auth_headers(conn, authhost, request, path, FALSE);
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}
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@@ -1550,6 +1550,14 @@ CURLcode Curl_add_custom_headers(struct connectdata *conn,
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Connection: */
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checkprefix("Connection", headers->data))
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;
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+ else if(checkprefix("Authorization:", headers->data) &&
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+ /* be careful of sending this potentially sensitive header to
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+ other hosts */
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+ (conn->data->state.this_is_a_follow &&
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+ conn->data->state.first_host &&
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+ !conn->data->set.allow_auth_to_other_hosts &&
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+ !strequal(conn->data->state.first_host, conn->host.name)))
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+ ;
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else {
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CURLcode result = Curl_add_bufferf(req_buffer, "%s\r\n",
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headers->data);
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diff --git a/lib/url.c b/lib/url.c
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index 71d4d8b..ba53131 100644
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--- a/lib/url.c
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+++ b/lib/url.c
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@@ -912,7 +912,7 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
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* Send authentication (user+password) when following locations, even when
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* hostname changed.
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*/
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- data->set.http_disable_hostname_check_before_authentication =
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+ data->set.allow_auth_to_other_hosts =
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(0 != va_arg(param, long))?TRUE:FALSE;
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break;
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diff --git a/lib/urldata.h b/lib/urldata.h
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index b4f18e7..1dd62ae 100644
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--- a/lib/urldata.h
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+++ b/lib/urldata.h
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@@ -1528,7 +1528,7 @@ struct UserDefined {
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bool http_fail_on_error; /* fail on HTTP error codes >= 300 */
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bool http_follow_location; /* follow HTTP redirects */
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bool http_transfer_encoding; /* request compressed HTTP transfer-encoding */
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- bool http_disable_hostname_check_before_authentication;
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+ bool allow_auth_to_other_hosts;
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bool include_header; /* include received protocol headers in data output */
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bool http_set_referer; /* is a custom referer used */
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bool http_auto_referer; /* set "correct" referer when following location: */
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diff --git a/tests/data/Makefile.am b/tests/data/Makefile.am
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index 3b31581..56cb286 100644
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--- a/tests/data/Makefile.am
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+++ b/tests/data/Makefile.am
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@@ -36,7 +36,8 @@ test276 test277 test278 test279 test280 test281 test282 test283 test284 \
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test285 test286 test287 test288 test289 test290 test291 test292 test293 \
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test294 test295 test296 test297 test298 test299 test300 test301 test302 \
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test303 test304 test305 test306 test307 test308 test309 test310 test311 \
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-test312 test313 test320 test321 test322 test323 test324 test350 test351 \
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+test312 test313 test317 test318 \
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+test320 test321 test322 test323 test324 test350 test351 \
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test352 test353 test354 test400 test401 test402 test403 test404 test405 \
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test406 test407 test408 test409 test500 test501 test502 test503 test504 \
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test505 test506 test507 test508 test510 test511 test512 test513 test514 \
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diff --git a/tests/data/test317 b/tests/data/test317
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new file mode 100644
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index 0000000..c6d8697
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--- /dev/null
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+++ b/tests/data/test317
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@@ -0,0 +1,94 @@
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+<testcase>
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+<info>
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+<keywords>
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+HTTP
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+HTTP proxy
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+HTTP Basic auth
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+HTTP proxy Basic auth
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+followlocation
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+</keywords>
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+</info>
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+#
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+# Server-side
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+<reply>
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+<data>
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+HTTP/1.1 302 OK
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+Date: Thu, 09 Nov 2010 14:49:00 GMT
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+Server: test-server/fake swsclose
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+Content-Type: text/html
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+Funny-head: yesyes
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+Location: http://goto.second.host.now/3170002
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+Content-Length: 8
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+Connection: close
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+
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+contents
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+</data>
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+<data2>
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+HTTP/1.1 200 OK
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+Date: Thu, 09 Nov 2010 14:49:00 GMT
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+Server: test-server/fake swsclose
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+Content-Type: text/html
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+Funny-head: yesyes
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+Content-Length: 9
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+
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+contents
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+</data2>
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+
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+<datacheck>
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+HTTP/1.1 302 OK
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+Date: Thu, 09 Nov 2010 14:49:00 GMT
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+Server: test-server/fake swsclose
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+Content-Type: text/html
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+Funny-head: yesyes
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+Location: http://goto.second.host.now/3170002
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+Content-Length: 8
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+Connection: close
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+
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+HTTP/1.1 200 OK
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+Date: Thu, 09 Nov 2010 14:49:00 GMT
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+Server: test-server/fake swsclose
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+Content-Type: text/html
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+Funny-head: yesyes
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+Content-Length: 9
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+
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+contents
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+</datacheck>
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+</reply>
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+
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+#
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+# Client-side
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+<client>
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+<server>
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+http
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+</server>
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+ <name>
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+HTTP with custom Authorization: and redirect to new host
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+ </name>
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+ <command>
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+http://first.host.it.is/we/want/that/page/317 -x %HOSTIP:%HTTPPORT -H "Authorization: s3cr3t" --proxy-user testing:this --location
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+</command>
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+</client>
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+
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+#
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+# Verify data after the test has been "shot"
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+<verify>
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+<strip>
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+^User-Agent:.*
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+</strip>
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+<protocol>
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+GET http://first.host.it.is/we/want/that/page/317 HTTP/1.1
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+Proxy-Authorization: Basic dGVzdGluZzp0aGlz
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+Host: first.host.it.is
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+Accept: */*
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+Proxy-Connection: Keep-Alive
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+Authorization: s3cr3t
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+
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+GET http://goto.second.host.now/3170002 HTTP/1.1
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+Proxy-Authorization: Basic dGVzdGluZzp0aGlz
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+Host: goto.second.host.now
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+Accept: */*
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+Proxy-Connection: Keep-Alive
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+
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+</protocol>
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+</verify>
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+</testcase>
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diff --git a/tests/data/test318 b/tests/data/test318
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new file mode 100644
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index 0000000..838d1ba
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--- /dev/null
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+++ b/tests/data/test318
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@@ -0,0 +1,95 @@
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+<testcase>
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+<info>
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+<keywords>
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+HTTP
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+HTTP proxy
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+HTTP Basic auth
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+HTTP proxy Basic auth
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+followlocation
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+</keywords>
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+</info>
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+#
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+# Server-side
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+<reply>
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+<data>
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+HTTP/1.1 302 OK
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+Date: Thu, 09 Nov 2010 14:49:00 GMT
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+Server: test-server/fake swsclose
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+Content-Type: text/html
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+Funny-head: yesyes
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+Location: http://goto.second.host.now/3180002
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+Content-Length: 8
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+Connection: close
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+
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+contents
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+</data>
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+<data2>
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+HTTP/1.1 200 OK
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+Date: Thu, 09 Nov 2010 14:49:00 GMT
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+Server: test-server/fake swsclose
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+Content-Type: text/html
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+Funny-head: yesyes
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+Content-Length: 9
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+
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+contents
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+</data2>
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+
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+<datacheck>
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+HTTP/1.1 302 OK
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+Date: Thu, 09 Nov 2010 14:49:00 GMT
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+Server: test-server/fake swsclose
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+Content-Type: text/html
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+Funny-head: yesyes
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+Location: http://goto.second.host.now/3180002
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+Content-Length: 8
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+Connection: close
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+
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+HTTP/1.1 200 OK
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+Date: Thu, 09 Nov 2010 14:49:00 GMT
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+Server: test-server/fake swsclose
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+Content-Type: text/html
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+Funny-head: yesyes
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+Content-Length: 9
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+
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+contents
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+</datacheck>
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+</reply>
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+
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+#
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+# Client-side
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+<client>
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+<server>
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+http
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+</server>
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+ <name>
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+HTTP with custom Authorization: and redirect to new host
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+ </name>
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+ <command>
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+http://first.host.it.is/we/want/that/page/318 -x %HOSTIP:%HTTPPORT -H "Authorization: s3cr3t" --proxy-user testing:this --location-trusted
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+</command>
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+</client>
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+
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+#
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+# Verify data after the test has been "shot"
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+<verify>
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+<strip>
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+^User-Agent:.*
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+</strip>
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+<protocol>
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+GET http://first.host.it.is/we/want/that/page/318 HTTP/1.1
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+Proxy-Authorization: Basic dGVzdGluZzp0aGlz
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+Host: first.host.it.is
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+Accept: */*
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+Proxy-Connection: Keep-Alive
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+Authorization: s3cr3t
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+
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+GET http://goto.second.host.now/3180002 HTTP/1.1
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+Proxy-Authorization: Basic dGVzdGluZzp0aGlz
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+Host: goto.second.host.now
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+Accept: */*
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+Proxy-Connection: Keep-Alive
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+Authorization: s3cr3t
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+
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+</protocol>
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+</verify>
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+</testcase>
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--
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2.13.6
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