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From c213de619a532d35e8f7abe4a245433dbf21c960 Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Sun, 17 Mar 2024 21:04:47 +0100
Subject: [PATCH 1/4] Fix GHSA-wpj3-hf5j-x4v4: __Host-/__Secure- cookie bypass
due to partial CVE-2022-31629 fix
The check happened too early as later code paths may perform more
mangling rules. Move the check downwards right before adding the actual
variable.
(cherry picked from commit 093c08af25fb323efa0c8e6154aa9fdeae3d3b53)
(cherry picked from commit 2e07a3acd7a6b53c55325b94bed97748d7697b53)
(cherry picked from commit a6c1c62a25ac23b08a86af11d68f0e2eaafc102b)
(cherry picked from commit 46b570a1e4aeb4a414898fcc09503ac388d16256)
---
ext/standard/tests/ghsa-wpj3-hf5j-x4v4.phpt | 63 +++++++++++++++++++++
main/php_variables.c | 41 +++++++++-----
2 files changed, 90 insertions(+), 14 deletions(-)
create mode 100644 ext/standard/tests/ghsa-wpj3-hf5j-x4v4.phpt
diff --git a/ext/standard/tests/ghsa-wpj3-hf5j-x4v4.phpt b/ext/standard/tests/ghsa-wpj3-hf5j-x4v4.phpt
new file mode 100644
index 0000000000..77fcb68089
--- /dev/null
+++ b/ext/standard/tests/ghsa-wpj3-hf5j-x4v4.phpt
@@ -0,0 +1,63 @@
+--TEST--
+ghsa-wpj3-hf5j-x4v4 (__Host-/__Secure- cookie bypass due to partial CVE-2022-31629 fix)
+--COOKIE--
+..Host-test=ignore_1;
+._Host-test=ignore_2;
+.[Host-test=ignore_3;
+_.Host-test=ignore_4;
+__Host-test=ignore_5;
+_[Host-test=ignore_6;
+[.Host-test=ignore_7;
+[_Host-test=ignore_8;
+[[Host-test=ignore_9;
+..Host-test[]=ignore_10;
+._Host-test[]=ignore_11;
+.[Host-test[]=ignore_12;
+_.Host-test[]=ignore_13;
+__Host-test[]=legitimate_14;
+_[Host-test[]=legitimate_15;
+[.Host-test[]=ignore_16;
+[_Host-test[]=ignore_17;
+[[Host-test[]=ignore_18;
+..Secure-test=ignore_1;
+._Secure-test=ignore_2;
+.[Secure-test=ignore_3;
+_.Secure-test=ignore_4;
+__Secure-test=ignore_5;
+_[Secure-test=ignore_6;
+[.Secure-test=ignore_7;
+[_Secure-test=ignore_8;
+[[Secure-test=ignore_9;
+..Secure-test[]=ignore_10;
+._Secure-test[]=ignore_11;
+.[Secure-test[]=ignore_12;
+_.Secure-test[]=ignore_13;
+__Secure-test[]=legitimate_14;
+_[Secure-test[]=legitimate_15;
+[.Secure-test[]=ignore_16;
+[_Secure-test[]=ignore_17;
+[[Secure-test[]=ignore_18;
+--FILE--
+<?php
+var_dump($_COOKIE);
+?>
+--EXPECT--
+array(3) {
+ ["__Host-test"]=>
+ array(1) {
+ [0]=>
+ string(13) "legitimate_14"
+ }
+ ["_"]=>
+ array(2) {
+ ["Host-test["]=>
+ string(13) "legitimate_15"
+ ["Secure-test["]=>
+ string(13) "legitimate_15"
+ }
+ ["__Secure-test"]=>
+ array(1) {
+ [0]=>
+ string(13) "legitimate_14"
+ }
+}
diff --git a/main/php_variables.c b/main/php_variables.c
index bd59134fc9..3e0e8d767e 100644
--- a/main/php_variables.c
+++ b/main/php_variables.c
@@ -59,6 +59,21 @@ PHPAPI void php_register_variable_safe(char *var, char *strval, size_t str_len,
php_register_variable_ex(var, &new_entry, track_vars_array);
}
+/* Discard variable if mangling made it start with __Host-, where pre-mangling it did not start with __Host-
+ * Discard variable if mangling made it start with __Secure-, where pre-mangling it did not start with __Secure- */
+static zend_bool php_is_forbidden_variable_name(const char *mangled_name, size_t mangled_name_len, const char *pre_mangled_name)
+{
+ if (mangled_name_len >= sizeof("__Host-")-1 && strncmp(mangled_name, "__Host-", sizeof("__Host-")-1) == 0 && strncmp(pre_mangled_name, "__Host-", sizeof("__Host-")-1) != 0) {
+ return 1;
+ }
+
+ if (mangled_name_len >= sizeof("__Secure-")-1 && strncmp(mangled_name, "__Secure-", sizeof("__Secure-")-1) == 0 && strncmp(pre_mangled_name, "__Secure-", sizeof("__Secure-")-1) != 0) {
+ return 1;
+ }
+
+ return 0;
+}
+
PHPAPI void php_register_variable_ex(char *var_name, zval *val, zval *track_vars_array)
{
char *p = NULL;
@@ -109,20 +124,6 @@ PHPAPI void php_register_variable_ex(char *var_name, zval *val, zval *track_vars
}
var_len = p - var;
- /* Discard variable if mangling made it start with __Host-, where pre-mangling it did not start with __Host- */
- if (strncmp(var, "__Host-", sizeof("__Host-")-1) == 0 && strncmp(var_name, "__Host-", sizeof("__Host-")-1) != 0) {
- zval_ptr_dtor_nogc(val);
- free_alloca(var_orig, use_heap);
- return;
- }
-
- /* Discard variable if mangling made it start with __Secure-, where pre-mangling it did not start with __Secure- */
- if (strncmp(var, "__Secure-", sizeof("__Secure-")-1) == 0 && strncmp(var_name, "__Secure-", sizeof("__Secure-")-1) != 0) {
- zval_ptr_dtor_nogc(val);
- free_alloca(var_orig, use_heap);
- return;
- }
-
if (var_len==0) { /* empty variable name, or variable name with a space in it */
zval_dtor(val);
free_alloca(var_orig, use_heap);
@@ -220,6 +221,12 @@ PHPAPI void php_register_variable_ex(char *var_name, zval *val, zval *track_vars
return;
}
} else {
+ if (php_is_forbidden_variable_name(index, index_len, var_name)) {
+ zval_ptr_dtor_nogc(val);
+ free_alloca(var_orig, use_heap);
+ return;
+ }
+
gpc_element_p = zend_symtable_str_find(symtable1, index, index_len);
if (!gpc_element_p) {
zval tmp;
@@ -258,6 +265,12 @@ plain_var:
zval_ptr_dtor(&gpc_element);
}
} else {
+ if (php_is_forbidden_variable_name(index, index_len, var_name)) {
+ zval_ptr_dtor_nogc(val);
+ free_alloca(var_orig, use_heap);
+ return;
+ }
+
/*
* According to rfc2965, more specific paths are listed above the less specific ones.
* If we encounter a duplicate cookie name, we should skip it, since it is not possible
--
2.44.0
From ee591001f7a3db7405b4fa027659768c2355df6d Mon Sep 17 00:00:00 2001
From: Remi Collet <remi@remirepo.net>
Date: Wed, 10 Apr 2024 08:59:32 +0200
Subject: [PATCH 2/4] NEWS
(cherry picked from commit 366cc249b7d54707572beb7096e8f6c65ee79719)
(cherry picked from commit dcdd49ef3bfbd8ccc778850d6a0f9b98adf625d4)
(cherry picked from commit 8642473b624f809b768180b104c013f74e3a99a0)
---
NEWS | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/NEWS b/NEWS
index 286f3df0f4..e55195bc56 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,12 @@
PHP NEWS
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+Backported from 8.1.28
+
+- Standard:
+ . Fixed bug GHSA-wpj3-hf5j-x4v4 (__Host-/__Secure- cookie bypass due to
+ partial CVE-2022-31629 fix). (CVE-2024-2756) (nielsdos)
+
Backported from 8.0.30
- Libxml:
--
2.44.0
|
