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From 48f126157d36962e458bf12f90b50cfcef26eee9 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 25 Apr 2022 16:24:33 +0200
Subject: [PATCH 1/4] connect: store "conn_remote_port" in the info struct
To make it available after the connection ended.
Upstream-commit: 08b8ef4e726ba10f45081ecda5b3cea788d3c839
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
lib/connect.c | 1 +
lib/urldata.h | 6 +++++-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/lib/connect.c b/lib/connect.c
index f724646..12a8aae 100644
--- a/lib/connect.c
+++ b/lib/connect.c
@@ -614,6 +614,7 @@ void Curl_persistconninfo(struct connectdata *conn)
conn->data->info.conn_scheme = conn->handler->scheme;
conn->data->info.conn_protocol = conn->handler->protocol;
conn->data->info.conn_primary_port = conn->primary_port;
+ conn->data->info.conn_remote_port = conn->remote_port;
conn->data->info.conn_local_port = conn->local_port;
}
diff --git a/lib/urldata.h b/lib/urldata.h
index 4bb0a84..cadf0e5 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -1050,7 +1050,11 @@ struct PureInfo {
reused, in the connection cache. */
char conn_primary_ip[MAX_IPADR_LEN];
- long conn_primary_port;
+ long conn_primary_port;/* this is the destination port to the connection,
+ which might have been a proxy */
+ int conn_remote_port; /* this is the "remote port", which is the port
+ number of the used URL, independent of proxy or
+ not */
char conn_local_ip[MAX_IPADR_LEN];
long conn_local_port;
--
2.34.1
From 6307fa6f9784402ba58697f46ba04354225391b7 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 25 Apr 2022 16:24:33 +0200
Subject: [PATCH 2/4] transfer: redirects to other protocols or ports clear
auth
... unless explicitly permitted.
Bug: https://curl.se/docs/CVE-2022-27774.html
Reported-by: Harry Sintonen
Closes #8748
Upstream-commit: 620ea21410030a9977396b4661806bc187231b79
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
lib/transfer.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++
lib/url.c | 27 ++++++++++++++--------
lib/urldata.h | 1 +
3 files changed, 81 insertions(+), 10 deletions(-)
diff --git a/lib/transfer.c b/lib/transfer.c
index ad5a7ba..2022cba 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -1370,6 +1370,7 @@ CURLcode Curl_pretransfer(struct Curl_easy *data)
data->state.wildcardmatch = data->set.wildcard_enabled;
data->set.followlocation = 0; /* reset the location-follow counter */
data->state.this_is_a_follow = FALSE; /* reset this */
+ data->state.this_is_a_follow_without_auth = FALSE;
data->state.errorbuf = FALSE; /* no error has occurred */
data->state.httpversion = 0; /* don't assume any particular server version */
@@ -1554,6 +1555,68 @@ CURLcode Curl_follow(struct Curl_easy *data,
}
+ /* Clear auth if this redirects to a different port number or protocol,
+ unless permitted */
+ if(!data->set.allow_auth_to_other_hosts && (type != FOLLOW_FAKE)) {
+ int port;
+ bool clear = FALSE;
+
+ CURLU *u = curl_url();
+ if(!u)
+ return CURLE_OUT_OF_MEMORY;
+
+ uc = curl_url_set(u, CURLUPART_URL, newurl,
+ ((type == FOLLOW_REDIR) ? CURLU_URLENCODE : 0));
+ if(uc) {
+ infof(data, "Clear auth, curl_url_set() failed\n");
+ clear = TRUE;
+ }
+
+ if(!clear) {
+ if(data->set.use_port && data->state.allow_port)
+ /* a custom port is used */
+ port = (int)data->set.use_port;
+ else {
+ char *portnum;
+ uc = curl_url_get(u, CURLUPART_PORT, &portnum, CURLU_DEFAULT_PORT);
+ if(uc) {
+ infof(data, "Clear auth, failed to parse port number\n");
+ clear = TRUE;
+ }
+ else {
+ port = atoi(portnum);
+ free(portnum);
+ }
+ }
+ }
+ if(!clear && port != data->info.conn_remote_port) {
+ infof(data, "Clear auth, redirects to port from %u to %u\n",
+ data->info.conn_remote_port, port);
+ clear = TRUE;
+ }
+ if(!clear) {
+ char *scheme;
+ const struct Curl_handler *p;
+ uc = curl_url_get(u, CURLUPART_SCHEME, &scheme, 0);
+ if(uc) {
+ infof(data, "Clear auth, failed to parse scheme\n");
+ clear = TRUE;
+ }
+ else {
+ p = Curl_builtin_scheme(scheme);
+ if(p && (p->protocol != data->info.conn_protocol)) {
+ infof(data, "Clear auth, redirects scheme from %s to %s\n",
+ data->info.conn_scheme, scheme);
+ clear = TRUE;
+ }
+ free(scheme);
+ }
+ }
+ if(clear)
+ data->state.this_is_a_follow_without_auth = TRUE;
+ curl_url_cleanup(u);
+ }
+
if(type == FOLLOW_FAKE) {
/* we're only figuring out the new url if we would've followed locations
but now we're done so we can get out! */
diff --git a/lib/url.c b/lib/url.c
index ed3c933..7dd5267 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -3483,18 +3483,25 @@ static CURLcode override_login(struct Curl_easy *data,
struct connectdata *conn,
char **userp, char **passwdp, char **optionsp)
{
- if(data->set.str[STRING_USERNAME]) {
- free(*userp);
- *userp = strdup(data->set.str[STRING_USERNAME]);
- if(!*userp)
- return CURLE_OUT_OF_MEMORY;
+ if(data->state.this_is_a_follow
+ && data->state.this_is_a_follow_without_auth)
+ {
+ conn->bits.user_passwd = FALSE;
}
+ else {
+ if(data->set.str[STRING_USERNAME]) {
+ free(*userp);
+ *userp = strdup(data->set.str[STRING_USERNAME]);
+ if(!*userp)
+ return CURLE_OUT_OF_MEMORY;
+ }
- if(data->set.str[STRING_PASSWORD]) {
- free(*passwdp);
- *passwdp = strdup(data->set.str[STRING_PASSWORD]);
- if(!*passwdp)
- return CURLE_OUT_OF_MEMORY;
+ if(data->set.str[STRING_PASSWORD]) {
+ free(*passwdp);
+ *passwdp = strdup(data->set.str[STRING_PASSWORD]);
+ if(!*passwdp)
+ return CURLE_OUT_OF_MEMORY;
+ }
}
if(data->set.str[STRING_OPTIONS]) {
diff --git a/lib/urldata.h b/lib/urldata.h
index cadf0e5..026684b 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -1234,6 +1234,7 @@ struct UrlState {
curl_off_t current_speed; /* the ProgressShow() function sets this,
bytes / second */
bool this_is_a_follow; /* this is a followed Location: request */
+ bool this_is_a_follow_without_auth;
bool refused_stream; /* this was refused, try again */
/* host name, port number and protocol of the first (not followed) request.
--
2.34.1
From b142f97840dfb033a1776d5a2986385da7753224 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 25 Apr 2022 16:24:33 +0200
Subject: [PATCH 3/4] tests: verify the fix for CVE-2022-27774
- Test 973 redirects from HTTP to FTP, clear auth
- Test 974 redirects from HTTP to HTTP different port, clear auth
- Test 975 redirects from HTTP to FTP, permitted to keep auth
- Test 976 redirects from HTTP to HTTP different port, permitted to keep
auth
Upstream-commit: 5295e8d64ac6949ecb3f9e564317a608f51b90d8
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
tests/data/Makefile.inc | 1 +
tests/data/test973 | 90 +++++++++++++++++++++++++++++++++++++++++
tests/data/test974 | 88 ++++++++++++++++++++++++++++++++++++++++
tests/data/test975 | 90 +++++++++++++++++++++++++++++++++++++++++
tests/data/test976 | 89 ++++++++++++++++++++++++++++++++++++++++
5 files changed, 358 insertions(+)
create mode 100644 tests/data/test973
create mode 100644 tests/data/test974
create mode 100644 tests/data/test975
create mode 100644 tests/data/test976
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 58c9e31..6c920ff 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -108,6 +108,7 @@ test927 test928 test929 test930 test931 test932 test933 test934 test935 \
test936 test937 test938 test939 test940 test941 test942 test943 test944 \
test945 test946 test947 test948 test949 test950 test951 test952 \
\
+test973 test974 test975 test976 \
test980 test981 test982 test983 test984 test985 test986 \
\
test1000 test1001 test1002 test1003 test1004 test1005 test1006 test1007 \
diff --git a/tests/data/test973 b/tests/data/test973
new file mode 100644
index 0000000..6fe6ce0
--- /dev/null
+++ b/tests/data/test973
@@ -0,0 +1,90 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+FTP
+--location
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: ftp://127.0.0.1:8992/a/path/9730002
+
+</data>
+<data2>
+data
+ to
+ see
+that FTP
+works
+ so does it?
+</data2>
+
+<datacheck>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: ftp://127.0.0.1:8992/a/path/9730002
+
+data
+ to
+ see
+that FTP
+works
+ so does it?
+</datacheck>
+
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+ftp
+</server>
+ <name>
+HTTP with auth redirected to FTP w/o auth
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/973 -L -u joe:secret
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET /973 HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Authorization: Basic am9lOnNlY3JldA==
+Accept: */*
+
+USER anonymous
+PASS ftp@example.com
+PWD
+CWD a
+CWD path
+EPSV
+TYPE I
+SIZE 9730002
+RETR 9730002
+QUIT
+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test974 b/tests/data/test974
new file mode 100644
index 0000000..de02d89
--- /dev/null
+++ b/tests/data/test974
@@ -0,0 +1,88 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+--location
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: http://firsthost.com:9999/a/path/9740002
+
+</data>
+<data2>
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 4
+Connection: close
+Content-Type: text/html
+
+hey
+</data2>
+
+<datacheck>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: http://firsthost.com:9999/a/path/9740002
+
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 4
+Connection: close
+Content-Type: text/html
+
+hey
+</datacheck>
+
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+</server>
+ <name>
+HTTP with auth redirected to HTTP on a diff port w/o auth
+ </name>
+ <command>
+-x http://%HOSTIP:%HTTPPORT http://firsthost.com -L -u joe:secret
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET http://firsthost.com/ HTTP/1.1
+Host: firsthost.com
+Authorization: Basic am9lOnNlY3JldA==
+Accept: */*
+Proxy-Connection: Keep-Alive
+
+GET http://firsthost.com:9999/a/path/9740002 HTTP/1.1
+Host: firsthost.com:9999
+Accept: */*
+Proxy-Connection: Keep-Alive
+
+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test975 b/tests/data/test975
new file mode 100644
index 0000000..3a4eccf
--- /dev/null
+++ b/tests/data/test975
@@ -0,0 +1,90 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+FTP
+--location-trusted
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: ftp://127.0.0.1:8992/a/path/9750002
+
+</data>
+<data2>
+data
+ to
+ see
+that FTP
+works
+ so does it?
+</data2>
+
+<datacheck>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: ftp://127.0.0.1:8992/a/path/9750002
+
+data
+ to
+ see
+that FTP
+works
+ so does it?
+</datacheck>
+
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+ftp
+</server>
+ <name>
+HTTP with auth redirected to FTP allowing auth to continue
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/975 --location-trusted -u joe:secret
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET /975 HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Authorization: Basic am9lOnNlY3JldA==
+Accept: */*
+
+USER joe
+PASS secret
+PWD
+CWD a
+CWD path
+EPSV
+TYPE I
+SIZE 9750002
+RETR 9750002
+QUIT
+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test976 b/tests/data/test976
new file mode 100644
index 0000000..3b6fac7
--- /dev/null
+++ b/tests/data/test976
@@ -0,0 +1,89 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+--location-trusted
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: http://firsthost.com:9999/a/path/9760002
+
+</data>
+<data2>
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 4
+Connection: close
+Content-Type: text/html
+
+hey
+</data2>
+
+<datacheck>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: http://firsthost.com:9999/a/path/9760002
+
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 4
+Connection: close
+Content-Type: text/html
+
+hey
+</datacheck>
+
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+</server>
+ <name>
+HTTP with auth redirected to HTTP on a diff port --location-trusted
+ </name>
+ <command>
+-x http://%HOSTIP:%HTTPPORT http://firsthost.com --location-trusted -u joe:secret
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET http://firsthost.com/ HTTP/1.1
+Host: firsthost.com
+Authorization: Basic am9lOnNlY3JldA==
+Accept: */*
+Proxy-Connection: Keep-Alive
+
+GET http://firsthost.com:9999/a/path/9760002 HTTP/1.1
+Host: firsthost.com:9999
+Authorization: Basic am9lOnNlY3JldA==
+Accept: */*
+Proxy-Connection: Keep-Alive
+
+</protocol>
+</verify>
+</testcase>
--
2.34.1
From cf98bd64b9949c50d4726eb26745c2f7fdf3a075 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 25 Apr 2022 17:59:15 +0200
Subject: [PATCH 4/4] openssl: don't leak the SRP credentials in redirects
either
Follow-up to 620ea21410030
Reported-by: Harry Sintonen
Closes #8751
Upstream-commit: 139a54ed0a172adaaf1a78d6f4fff50b2c3f9e08
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
lib/http.c | 10 +++++-----
lib/http.h | 6 ++++++
lib/vtls/openssl.c | 3 ++-
3 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/lib/http.c b/lib/http.c
index 39fc7aa..d413738 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -689,10 +689,10 @@ output_auth_headers(struct connectdata *conn,
}
/*
- * allow_auth_to_host() tells if autentication, cookies or other "sensitive
- * data" can (still) be sent to this host.
+ * Curl_allow_auth_to_host() tells if authentication, cookies or other
+ * "sensitive data" can (still) be sent to this host.
*/
-static bool allow_auth_to_host(struct connectdata *conn)
+bool Curl_allow_auth_to_host(struct connectdata *conn)
{
struct Curl_easy *data = conn->data;
return (!data->state.this_is_a_follow ||
@@ -773,7 +773,7 @@ Curl_http_output_auth(struct connectdata *conn,
/* To prevent the user+password to get sent to other than the original host
due to a location-follow */
- if(allow_auth_to_host(conn)
+ if(Curl_allow_auth_to_host(conn)
|| conn->bits.netrc)
result = output_auth_headers(conn, authhost, request, path, FALSE);
else
@@ -1789,7 +1789,7 @@ CURLcode Curl_add_custom_headers(struct connectdata *conn,
checkprefix("Cookie:", headers->data)) &&
/* be careful of sending this potentially sensitive header to
other hosts */
- !allow_auth_to_host(conn))
+ !Curl_allow_auth_to_host(conn))
;
else {
result = Curl_add_bufferf(req_buffer, "%s\r\n", headers->data);
diff --git a/lib/http.h b/lib/http.h
index 1d373e8..56a6061 100644
--- a/lib/http.h
+++ b/lib/http.h
@@ -252,5 +252,11 @@ Curl_http_output_auth(struct connectdata *conn,
bool proxytunnel); /* TRUE if this is the request setting
up the proxy tunnel */
+/*
+ * Curl_allow_auth_to_host() tells if authentication, cookies or other
+ * "sensitive data" can (still) be sent to this host.
+ */
+bool Curl_allow_auth_to_host(struct connectdata *conn);
+
#endif /* HEADER_CURL_HTTP_H */
diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index 28eaa6d..6c8faa2 100644
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -2499,7 +2499,8 @@ static CURLcode ossl_connect_step1(struct connectdata *conn, int sockindex)
#endif
#ifdef USE_TLS_SRP
- if(ssl_authtype == CURL_TLSAUTH_SRP) {
+ if((ssl_authtype == CURL_TLSAUTH_SRP) &&
+ Curl_allow_auth_to_host(conn)) {
char * const ssl_username = SSL_SET_OPTION(username);
infof(data, "Using TLS-SRP username: %s\n", ssl_username);
--
2.34.1
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