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-rw-r--r--php-cve-2024-2756.patch197
1 files changed, 197 insertions, 0 deletions
diff --git a/php-cve-2024-2756.patch b/php-cve-2024-2756.patch
new file mode 100644
index 0000000..6e13a30
--- /dev/null
+++ b/php-cve-2024-2756.patch
@@ -0,0 +1,197 @@
+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
+