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authorRemi Collet <remi@remirepo.net>2024-06-05 10:42:39 +0200
committerRemi Collet <remi@php.net>2024-06-05 10:42:39 +0200
commitec848d5c6c8a9508202a4c3e1e61ad2d5a06568b (patch)
tree85f27e01b3f089726d1dc49e8fccf4fe0b1a5b98 /php-cve-2024-5458.patch
parent827a76739becbd6187f314db6291363b57975efc (diff)
Fix filter bypass in filter_var FILTER_VALIDATE_URLHEADmaster
CVE-2024-5458
Diffstat (limited to 'php-cve-2024-5458.patch')
-rw-r--r--php-cve-2024-5458.patch188
1 files changed, 188 insertions, 0 deletions
diff --git a/php-cve-2024-5458.patch b/php-cve-2024-5458.patch
new file mode 100644
index 0000000..88c4db2
--- /dev/null
+++ b/php-cve-2024-5458.patch
@@ -0,0 +1,188 @@
+From f232d87846394315071ae115fcb8f1c4d1771eb3 Mon Sep 17 00:00:00 2001
+From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
+Date: Wed, 22 May 2024 22:25:02 +0200
+Subject: [PATCH 1/2] Fix GHSA-w8qr-v226-r27w
+
+We should not early-out with success status if we found an ipv6
+hostname, we should keep checking the rest of the conditions.
+Because integrating the if-check of the ipv6 hostname in the
+"Validate domain" if-check made the code hard to read, I extracted the
+condition out to a separate function. This also required to make
+a few pointers const in order to have some clean code.
+
+(cherry picked from commit 4066610b47e22c24cbee91be434a94357056a479)
+(cherry picked from commit 08be64e40197fc12dca5f802d16748d9c3cb4cb4)
+(cherry picked from commit 76362f9526afbd5565003d981f9507aaf62337f2)
+(cherry picked from commit 87a7b8dab75e221a1fcd74cf34dc650f7253c12c)
+(cherry picked from commit b919ad0323dbc3e1e1ac0f6ba8ec2ad380579918)
+---
+ ext/filter/logical_filters.c | 35 ++++++++++---------
+ ext/filter/tests/ghsa-w8qr-v226-r27w.phpt | 41 +++++++++++++++++++++++
+ 2 files changed, 61 insertions(+), 15 deletions(-)
+ create mode 100644 ext/filter/tests/ghsa-w8qr-v226-r27w.phpt
+
+diff --git a/ext/filter/logical_filters.c b/ext/filter/logical_filters.c
+index 7a37f80e46..76a753f60c 100644
+--- a/ext/filter/logical_filters.c
++++ b/ext/filter/logical_filters.c
+@@ -81,7 +81,7 @@
+ #define FORMAT_IPV4 4
+ #define FORMAT_IPV6 6
+
+-static int _php_filter_validate_ipv6(char *str, size_t str_len);
++static int _php_filter_validate_ipv6(const char *str, size_t str_len);
+
+ static int php_filter_parse_int(const char *str, size_t str_len, zend_long *ret) { /* {{{ */
+ zend_long ctx_value;
+@@ -532,6 +532,14 @@ static int is_userinfo_valid(char *str)
+ return 1;
+ }
+
++static zend_bool php_filter_is_valid_ipv6_hostname(const char *s, size_t l)
++{
++ const char *e = s + l;
++ const char *t = e - 1;
++
++ return *s == '[' && *t == ']' && _php_filter_validate_ipv6(s + 1, l - 2);
++}
++
+ void php_filter_validate_url(PHP_INPUT_FILTER_PARAM_DECL) /* {{{ */
+ {
+ php_url *url;
+@@ -551,7 +559,7 @@ void php_filter_validate_url(PHP_INPUT_FILTER_PARAM_DECL) /* {{{ */
+ }
+
+ if (url->scheme != NULL && (!strcasecmp(url->scheme, "http") || !strcasecmp(url->scheme, "https"))) {
+- char *e, *s, *t;
++ const char *s;
+ size_t l;
+
+ if (url->host == NULL) {
+@@ -560,17 +568,14 @@ void php_filter_validate_url(PHP_INPUT_FILTER_PARAM_DECL) /* {{{ */
+
+ s = url->host;
+ l = strlen(s);
+- e = url->host + l;
+- t = e - 1;
+-
+- /* An IPv6 enclosed by square brackets is a valid hostname */
+- if (*s == '[' && *t == ']' && _php_filter_validate_ipv6((s + 1), l - 2)) {
+- php_url_free(url);
+- return;
+- }
+
+- // Validate domain
+- if (!_php_filter_validate_domain(url->host, l, FILTER_FLAG_HOSTNAME)) {
++ if (
++ /* An IPv6 enclosed by square brackets is a valid hostname.*/
++ !php_filter_is_valid_ipv6_hostname(s, l) &&
++ /* Validate domain.
++ * This includes a loose check for an IPv4 address. */
++ !_php_filter_validate_domain(url->host, l, FILTER_FLAG_HOSTNAME)
++ ) {
+ php_url_free(url);
+ RETURN_VALIDATION_FAILED
+ }
+@@ -691,15 +696,15 @@ static int _php_filter_validate_ipv4(char *str, size_t str_len, int *ip) /* {{{
+ }
+ /* }}} */
+
+-static int _php_filter_validate_ipv6(char *str, size_t str_len) /* {{{ */
++static int _php_filter_validate_ipv6(const char *str, size_t str_len) /* {{{ */
+ {
+ int compressed = 0;
+ int blocks = 0;
+ int n;
+ char *ipv4;
+- char *end;
++ const char *end;
+ int ip4elm[4];
+- char *s = str;
++ const char *s = str;
+
+ if (!memchr(str, ':', str_len)) {
+ return 0;
+diff --git a/ext/filter/tests/ghsa-w8qr-v226-r27w.phpt b/ext/filter/tests/ghsa-w8qr-v226-r27w.phpt
+new file mode 100644
+index 0000000000..0092408ee5
+--- /dev/null
++++ b/ext/filter/tests/ghsa-w8qr-v226-r27w.phpt
+@@ -0,0 +1,41 @@
++--TEST--
++GHSA-w8qr-v226-r27w
++--EXTENSIONS--
++filter
++--FILE--
++<?php
++
++function test(string $input) {
++ var_dump(filter_var($input, FILTER_VALIDATE_URL));
++}
++
++echo "--- These ones should fail ---\n";
++test("http://t[est@127.0.0.1");
++test("http://t[est@[::1]");
++test("http://t[est@[::1");
++test("http://t[est@::1]");
++test("http://php.net\\@aliyun.com/aaa.do");
++test("http://test[@2001:db8:3333:4444:5555:6666:1.2.3.4]");
++test("http://te[st@2001:db8:3333:4444:5555:6666:1.2.3.4]");
++test("http://te[st@2001:db8:3333:4444:5555:6666:1.2.3.4");
++
++echo "--- These ones should work ---\n";
++test("http://test@127.0.0.1");
++test("http://test@[2001:db8:3333:4444:5555:6666:1.2.3.4]");
++test("http://test@[::1]");
++
++?>
++--EXPECT--
++--- These ones should fail ---
++bool(false)
++bool(false)
++bool(false)
++bool(false)
++bool(false)
++bool(false)
++bool(false)
++bool(false)
++--- These ones should work ---
++string(21) "http://test@127.0.0.1"
++string(50) "http://test@[2001:db8:3333:4444:5555:6666:1.2.3.4]"
++string(17) "http://test@[::1]"
+--
+2.45.1
+
+From 573b921a612068f66f6540b69b0a9bc9f372ecf1 Mon Sep 17 00:00:00 2001
+From: Remi Collet <remi@remirepo.net>
+Date: Tue, 4 Jun 2024 16:48:08 +0200
+Subject: [PATCH 2/2] NEWS
+
+(cherry picked from commit a1ff81b786bd519597e770795be114f5171f0648)
+(cherry picked from commit ec1d5e6468479e64acc7fb8cb955f053b64ea9a0)
+(cherry picked from commit cfe1b1acead13b6af163f3ce947d3a1dbded82a0)
+(cherry picked from commit 6b6444a1b72d6249cfa592f20395efe67ca55f73)
+(cherry picked from commit 8d4db37794eff4761a336d7cee53d47f0eb0d313)
+---
+ NEWS | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/NEWS b/NEWS
+index fed03499f6..1f6f1376b4 100644
+--- a/NEWS
++++ b/NEWS
+@@ -1,6 +1,12 @@
+ PHP NEWS
+ |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+
++Backported from 8.1.29
++
++- Filter:
++ . Fixed bug GHSA-w8qr-v226-r27w (Filter bypass in filter_var FILTER_VALIDATE_URL).
++ (CVE-2024-5458) (nielsdos)
++
+ Backported from 8.1.28
+
+ - Standard:
+--
+2.45.1
+