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authorDaniel Stenberg <daniel@haxx.se>2018-01-19 13:19:25 +0100
committerDaniel Stenberg <daniel@haxx.se>2018-01-22 10:00:00 +0100
commitaf32cd3859336ab963591ca0df9b1e33a7ee066b (patch)
treeae91ca52a3cbbfabe89c74dda181abbbc40c1150
parent993dd5651a6c853bfe3870f6a69c7b329fa4e8ce (diff)
http: prevent custom Authorization headers in redirects
... unless CURLOPT_UNRESTRICTED_AUTH is set to allow them. This matches how curl already handles Authorization headers created internally. Note: this changes behavior slightly, for the sake of reducing mistakes. Added test 317 and 318 to verify. Reported-by: Craig de Stigter Bug: https://curl.haxx.se/docs/adv_2018-b3bf.html
-rw-r--r--docs/libcurl/opts/CURLOPT_HTTPHEADER.312
-rw-r--r--lib/http.c10
-rw-r--r--lib/setopt.c2
-rw-r--r--lib/urldata.h2
-rw-r--r--tests/data/Makefile.inc2
-rw-r--r--tests/data/test31794
-rw-r--r--tests/data/test31895
7 files changed, 212 insertions, 5 deletions
diff --git a/docs/libcurl/opts/CURLOPT_HTTPHEADER.3 b/docs/libcurl/opts/CURLOPT_HTTPHEADER.3
index c5ccb1a53..c9f29e393 100644
--- a/docs/libcurl/opts/CURLOPT_HTTPHEADER.3
+++ b/docs/libcurl/opts/CURLOPT_HTTPHEADER.3
@@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
-.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
@@ -77,6 +77,16 @@ the headers. They may be private or otherwise sensitive to leak.
Use \fICURLOPT_HEADEROPT(3)\fP to make the headers only get sent to where you
intend them to get sent.
+
+Custom headers are sent in all requests done by the easy handles, which
+implies that if you tell libcurl to follow redirects
+(\fBCURLOPT_FOLLOWLOCATION(3)\fP), the same set of custom headers will be sent
+in the subsequent request. Redirects can of course go to other hosts and thus
+those servers will get all the contents of your custom headers too.
+
+Starting in 7.58.0, libcurl will specifically prevent "Authorization:" headers
+from being sent to other hosts than the first used one, unless specifically
+permitted with the \fBCURLOPT_UNRESTRICTED_AUTH(3)\fP option.
.SH DEFAULT
NULL
.SH PROTOCOLS
diff --git a/lib/http.c b/lib/http.c
index c1cdf2da0..a5007670d 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -714,7 +714,7 @@ Curl_http_output_auth(struct connectdata *conn,
if(!data->state.this_is_a_follow ||
conn->bits.netrc ||
!data->state.first_host ||
- data->set.http_disable_hostname_check_before_authentication ||
+ data->set.allow_auth_to_other_hosts ||
strcasecompare(data->state.first_host, conn->host.name)) {
result = output_auth_headers(conn, authhost, request, path, FALSE);
}
@@ -1636,6 +1636,14 @@ CURLcode Curl_add_custom_headers(struct connectdata *conn,
checkprefix("Transfer-Encoding:", headers->data))
/* HTTP/2 doesn't support chunked requests */
;
+ else if(checkprefix("Authorization:", headers->data) &&
+ /* be careful of sending this potentially sensitive header to
+ other hosts */
+ (data->state.this_is_a_follow &&
+ data->state.first_host &&
+ !data->set.allow_auth_to_other_hosts &&
+ !strcasecompare(data->state.first_host, conn->host.name)))
+ ;
else {
CURLcode result = Curl_add_bufferf(req_buffer, "%s\r\n",
headers->data);
diff --git a/lib/setopt.c b/lib/setopt.c
index 66f30ea65..a5ef75c72 100644
--- a/lib/setopt.c
+++ b/lib/setopt.c
@@ -442,7 +442,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option,
* Send authentication (user+password) when following locations, even when
* hostname changed.
*/
- data->set.http_disable_hostname_check_before_authentication =
+ data->set.allow_auth_to_other_hosts =
(0 != va_arg(param, long)) ? TRUE : FALSE;
break;
diff --git a/lib/urldata.h b/lib/urldata.h
index 4dcd1a322..5c04ad172 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -1599,7 +1599,7 @@ struct UserDefined {
bool http_keep_sending_on_error; /* for HTTP status codes >= 300 */
bool http_follow_location; /* follow HTTP redirects */
bool http_transfer_encoding; /* request compressed HTTP transfer-encoding */
- bool http_disable_hostname_check_before_authentication;
+ bool allow_auth_to_other_hosts;
bool include_header; /* include received protocol headers in data output */
bool http_set_referer; /* is a custom referer used */
bool http_auto_referer; /* set "correct" referer when following location: */
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 7e3ca25d5..a2cf70bcd 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -55,7 +55,7 @@ test280 test281 test282 test283 test284 test285 test286 test287 test288 \
test289 test290 test291 test292 test293 test294 test295 test296 test297 \
test298 test299 test300 test301 test302 test303 test304 test305 test306 \
test307 test308 test309 test310 test311 test312 test313 test314 test315 \
-test316 test320 test321 test322 test323 test324 \
+test316 test317 test318 test320 test321 test322 test323 test324 \
test325 \
test350 test351 test352 test353 test354 \
test393 test394 test395 \
diff --git a/tests/data/test317 b/tests/data/test317
new file mode 100644
index 000000000..c6d8697be
--- /dev/null
+++ b/tests/data/test317
@@ -0,0 +1,94 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP proxy
+HTTP Basic auth
+HTTP proxy Basic auth
+followlocation
+</keywords>
+</info>
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 302 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake swsclose
+Content-Type: text/html
+Funny-head: yesyes
+Location: http://goto.second.host.now/3170002
+Content-Length: 8
+Connection: close
+
+contents
+</data>
+<data2>
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake swsclose
+Content-Type: text/html
+Funny-head: yesyes
+Content-Length: 9
+
+contents
+</data2>
+
+<datacheck>
+HTTP/1.1 302 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake swsclose
+Content-Type: text/html
+Funny-head: yesyes
+Location: http://goto.second.host.now/3170002
+Content-Length: 8
+Connection: close
+
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake swsclose
+Content-Type: text/html
+Funny-head: yesyes
+Content-Length: 9
+
+contents
+</datacheck>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+</server>
+ <name>
+HTTP with custom Authorization: and redirect to new host
+ </name>
+ <command>
+http://first.host.it.is/we/want/that/page/317 -x %HOSTIP:%HTTPPORT -H "Authorization: s3cr3t" --proxy-user testing:this --location
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET http://first.host.it.is/we/want/that/page/317 HTTP/1.1
+Host: first.host.it.is
+Proxy-Authorization: Basic dGVzdGluZzp0aGlz
+Accept: */*
+Proxy-Connection: Keep-Alive
+Authorization: s3cr3t
+
+GET http://goto.second.host.now/3170002 HTTP/1.1
+Host: goto.second.host.now
+Proxy-Authorization: Basic dGVzdGluZzp0aGlz
+Accept: */*
+Proxy-Connection: Keep-Alive
+
+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test318 b/tests/data/test318
new file mode 100644
index 000000000..838d1ba0f
--- /dev/null
+++ b/tests/data/test318
@@ -0,0 +1,95 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP proxy
+HTTP Basic auth
+HTTP proxy Basic auth
+followlocation
+</keywords>
+</info>
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 302 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake swsclose
+Content-Type: text/html
+Funny-head: yesyes
+Location: http://goto.second.host.now/3180002
+Content-Length: 8
+Connection: close
+
+contents
+</data>
+<data2>
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake swsclose
+Content-Type: text/html
+Funny-head: yesyes
+Content-Length: 9
+
+contents
+</data2>
+
+<datacheck>
+HTTP/1.1 302 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake swsclose
+Content-Type: text/html
+Funny-head: yesyes
+Location: http://goto.second.host.now/3180002
+Content-Length: 8
+Connection: close
+
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake swsclose
+Content-Type: text/html
+Funny-head: yesyes
+Content-Length: 9
+
+contents
+</datacheck>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+</server>
+ <name>
+HTTP with custom Authorization: and redirect to new host
+ </name>
+ <command>
+http://first.host.it.is/we/want/that/page/318 -x %HOSTIP:%HTTPPORT -H "Authorization: s3cr3t" --proxy-user testing:this --location-trusted
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET http://first.host.it.is/we/want/that/page/318 HTTP/1.1
+Host: first.host.it.is
+Proxy-Authorization: Basic dGVzdGluZzp0aGlz
+Accept: */*
+Proxy-Connection: Keep-Alive
+Authorization: s3cr3t
+
+GET http://goto.second.host.now/3180002 HTTP/1.1
+Host: goto.second.host.now
+Proxy-Authorization: Basic dGVzdGluZzp0aGlz
+Accept: */*
+Proxy-Connection: Keep-Alive
+Authorization: s3cr3t
+
+</protocol>
+</verify>
+</testcase>