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From 7a90808f97cee0c12ae5c219eddc522721740d71 Mon Sep 17 00:00:00 2001
From: "Christoph M. Becker" <cmbecker69@gmx.de>
Date: Wed, 13 May 2020 09:36:52 +0200
Subject: [PATCH 1/2] Fix #77423: parse_url() will deliver a wrong host to user
To avoid that `parse_url()` returns an erroneous host, which would be
valid for `FILTER_VALIDATE_URL`, we make sure that only userinfo which
is valid according to RFC 3986 is treated as such.
For consistency with the existing url parsing code, we use ctype
functions, although that is not necessarily correct.
(cherry picked from commit 2d3d72412a6734e19a38ed10f385227a6238e4a6)
(cherry picked from commit 31459f94f2780e748e15d5c2951ba20adbba2366)
---
ext/standard/tests/strings/url_t.phpt | 6 ++--
ext/standard/tests/url/bug77423.phpt | 30 +++++++++++++++++++
.../tests/url/parse_url_basic_001.phpt | 6 ++--
.../tests/url/parse_url_basic_003.phpt | 2 +-
.../tests/url/parse_url_basic_005.phpt | 2 +-
ext/standard/url.c | 21 +++++++++++++
6 files changed, 57 insertions(+), 10 deletions(-)
create mode 100644 ext/standard/tests/url/bug77423.phpt
diff --git a/ext/standard/tests/strings/url_t.phpt b/ext/standard/tests/strings/url_t.phpt
index e172061ec2..80e164a08e 100644
--- a/ext/standard/tests/strings/url_t.phpt
+++ b/ext/standard/tests/strings/url_t.phpt
@@ -575,15 +575,13 @@ $sample_urls = array (
string(16) "some_page_ref123"
}
---> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123: array(7) {
+--> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123: array(6) {
["scheme"]=>
string(4) "http"
["host"]=>
- string(11) "www.php.net"
+ string(26) "secret@hideout@www.php.net"
["port"]=>
int(80)
- ["user"]=>
- string(14) "secret@hideout"
["path"]=>
string(10) "/index.php"
["query"]=>
diff --git a/ext/standard/tests/url/bug77423.phpt b/ext/standard/tests/url/bug77423.phpt
new file mode 100644
index 0000000000..be03fe95e2
--- /dev/null
+++ b/ext/standard/tests/url/bug77423.phpt
@@ -0,0 +1,30 @@
+--TEST--
+Bug #77423 (parse_url() will deliver a wrong host to user)
+--FILE--
+<?php
+$urls = array(
+ "http://php.net\@aliyun.com/aaa.do",
+ "https://example.com\uFF03@bing.com",
+);
+foreach ($urls as $url) {
+ var_dump(filter_var($url, FILTER_VALIDATE_URL));
+ var_dump(parse_url($url));
+}
+?>
+--EXPECT--
+bool(false)
+array(3) {
+ ["scheme"]=>
+ string(4) "http"
+ ["host"]=>
+ string(19) "php.net\@aliyun.com"
+ ["path"]=>
+ string(7) "/aaa.do"
+}
+bool(false)
+array(2) {
+ ["scheme"]=>
+ string(5) "https"
+ ["host"]=>
+ string(26) "example.com\uFF03@bing.com"
+}
diff --git a/ext/standard/tests/url/parse_url_basic_001.phpt b/ext/standard/tests/url/parse_url_basic_001.phpt
index e468066a42..c9e9d32de0 100644
--- a/ext/standard/tests/url/parse_url_basic_001.phpt
+++ b/ext/standard/tests/url/parse_url_basic_001.phpt
@@ -507,15 +507,13 @@ echo "Done";
string(16) "some_page_ref123"
}
---> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123: array(7) {
+--> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123: array(6) {
["scheme"]=>
string(4) "http"
["host"]=>
- string(11) "www.php.net"
+ string(26) "secret@hideout@www.php.net"
["port"]=>
int(80)
- ["user"]=>
- string(14) "secret@hideout"
["path"]=>
string(10) "/index.php"
["query"]=>
diff --git a/ext/standard/tests/url/parse_url_basic_003.phpt b/ext/standard/tests/url/parse_url_basic_003.phpt
index 70dc4bb90b..431de27009 100644
--- a/ext/standard/tests/url/parse_url_basic_003.phpt
+++ b/ext/standard/tests/url/parse_url_basic_003.phpt
@@ -68,7 +68,7 @@ echo "Done";
--> http://secret:@www.php.net/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net"
--> http://:hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net"
--> http://secret:hideout@www.php.net/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net"
---> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net"
+--> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(26) "secret@hideout@www.php.net"
--> http://secret:hid:out@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net"
--> nntp://news.php.net : string(12) "news.php.net"
--> ftp://ftp.gnu.org/gnu/glic/glibc.tar.gz : string(11) "ftp.gnu.org"
diff --git a/ext/standard/tests/url/parse_url_basic_005.phpt b/ext/standard/tests/url/parse_url_basic_005.phpt
index b2ca06ff96..b2c1a1d6dd 100644
--- a/ext/standard/tests/url/parse_url_basic_005.phpt
+++ b/ext/standard/tests/url/parse_url_basic_005.phpt
@@ -68,7 +68,7 @@ echo "Done";
--> http://secret:@www.php.net/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(6) "secret"
--> http://:hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(0) ""
--> http://secret:hideout@www.php.net/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(6) "secret"
---> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(14) "secret@hideout"
+--> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : NULL
--> http://secret:hid:out@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(6) "secret"
--> nntp://news.php.net : NULL
--> ftp://ftp.gnu.org/gnu/glic/glibc.tar.gz : NULL
diff --git a/ext/standard/url.c b/ext/standard/url.c
index 0278bd47e8..8da9da3d6a 100644
--- a/ext/standard/url.c
+++ b/ext/standard/url.c
@@ -92,6 +92,22 @@ PHPAPI php_url *php_url_parse(char const *str)
return php_url_parse_ex(str, strlen(str));
}
+static int is_userinfo_valid(const char *str, size_t len)
+{
+ char *valid = "-._~!$&'()*+,;=:";
+ char *p = str;
+ while (p - str < len) {
+ if (isalpha(*p) || isdigit(*p) || strchr(valid, *p)) {
+ p++;
+ } else if (*p == '%' && p - str <= len - 3 && isdigit(*(p+1)) && isxdigit(*(p+2))) {
+ p += 3;
+ } else {
+ return 0;
+ }
+ }
+ return 1;
+}
+
/* {{{ php_url_parse
*/
PHPAPI php_url *php_url_parse_ex(char const *str, int length)
@@ -230,13 +246,18 @@ PHPAPI php_url *php_url_parse_ex(char const *str, int length)
ret->pass = estrndup(pp, (p-pp));
php_replace_controlchars_ex(ret->pass, (p-pp));
} else {
+ if (!is_userinfo_valid(s, p-s)) {
+ goto check_port;
+ }
ret->user = estrndup(s, (p-s));
php_replace_controlchars_ex(ret->user, (p-s));
+
}
s = p + 1;
}
+check_port:
/* check for port */
if (s < ue && *s == '[' && *(e-1) == ']') {
/* Short circuit portscan,
--
2.29.2
From d45b940106cb5a3bfc43f7a9616dde23f9ad1f43 Mon Sep 17 00:00:00 2001
From: Remi Collet <remi@remirepo.net>
Date: Mon, 4 Jan 2021 14:20:55 +0100
Subject: [PATCH 2/2] NEWS
(cherry picked from commit c784479182b92b9b3b96a7be42aa86a6c6d0b693)
---
NEWS | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/NEWS b/NEWS
index 7ca1c46721..43e3b8faf3 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,12 @@
PHP NEWS
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+Backported from 7.3.26
+
+- Standard:
+ . Fixed bug #77423 (FILTER_VALIDATE_URL accepts URLs with invalid userinfo).
+ (CVE-2020-7071) (cmb)
+
Backported from 7.2.34
- Core:
--
2.29.2
|
