From 8d3fbacab4be105a9c72cc580a8b95b8701140c5 Mon Sep 17 00:00:00 2001
From: Remi Collet <remi@remirepo.net>
Date: Tue, 21 Jan 2020 10:51:41 +0100
Subject: mbstring:   Fix #79037 global buffer-overflow in
 mbfl_filt_conv_big5_wchar   CVE-2020-7060 standard:   Fix #79099 OOB read in
 php_strip_tags_ex   CVE-2020-7059

---
 php-bug79099.patch | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 php-bug79099.patch

(limited to 'php-bug79099.patch')

diff --git a/php-bug79099.patch b/php-bug79099.patch
new file mode 100644
index 0000000..67660c3
--- /dev/null
+++ b/php-bug79099.patch
@@ -0,0 +1,81 @@
+From 9db5a8f58dd26d547cf530beeb41155d97e700f0 Mon Sep 17 00:00:00 2001
+From: Stanislav Malyshev <stas@php.net>
+Date: Mon, 20 Jan 2020 21:33:17 -0800
+Subject: [PATCH] Fix #79099: OOB read in php_strip_tags_ex
+
+(cherry picked from commit 0f79b1bf301f455967676b5129240140c5c45b09)
+---
+ ext/standard/string.c                 |  6 ++---
+ ext/standard/tests/file/bug79099.phpt | 32 +++++++++++++++++++++++++++
+ 2 files changed, 35 insertions(+), 3 deletions(-)
+ create mode 100644 ext/standard/tests/file/bug79099.phpt
+
+diff --git a/ext/standard/string.c b/ext/standard/string.c
+index 569452ca93..9b75adc3b7 100644
+--- a/ext/standard/string.c
++++ b/ext/standard/string.c
+@@ -4770,7 +4770,7 @@ PHPAPI size_t php_strip_tags_ex(char *rbuf, int len, int *stateptr, char *allow,
+ 				if (state == 4) {
+ 					/* Inside <!-- comment --> */
+ 					break;
+-				} else if (state == 2 && *(p-1) != '\\') {
++				} else if (state == 2 && p >= buf + 1 && *(p-1) != '\\') {
+ 					if (lc == c) {
+ 						lc = '\0';
+ 					} else if (lc != '\\') {
+@@ -4797,7 +4797,7 @@ PHPAPI size_t php_strip_tags_ex(char *rbuf, int len, int *stateptr, char *allow,
+ 
+ 			case '!':
+ 				/* JavaScript & Other HTML scripting languages */
+-				if (state == 1 && *(p-1) == '<') {
++				if (state == 1 && p >= buf + 1 && *(p-1) == '<') {
+ 					state = 3;
+ 					lc = c;
+ 				} else {
+@@ -4824,7 +4824,7 @@ PHPAPI size_t php_strip_tags_ex(char *rbuf, int len, int *stateptr, char *allow,
+ 
+ 			case '?':
+ 
+-				if (state == 1 && *(p-1) == '<') {
++				if (state == 1 && p >= buf + 1 && *(p-1) == '<') {
+ 					br=0;
+ 					state=2;
+ 					break;
+diff --git a/ext/standard/tests/file/bug79099.phpt b/ext/standard/tests/file/bug79099.phpt
+new file mode 100644
+index 0000000000..7c842f4654
+--- /dev/null
++++ b/ext/standard/tests/file/bug79099.phpt
+@@ -0,0 +1,32 @@
++--TEST--
++Bug #79099 (OOB read in php_strip_tags_ex)
++--FILE--
++<?php
++$stream = fopen('php://memory', 'w+');
++fputs($stream, "<?\n\"\n");
++rewind($stream);
++var_dump(fgetss($stream));
++var_dump(fgetss($stream));
++fclose($stream);
++
++$stream = fopen('php://memory', 'w+');
++fputs($stream, "<\0\n!\n");
++rewind($stream);
++var_dump(fgetss($stream));
++var_dump(fgetss($stream));
++fclose($stream);
++
++$stream = fopen('php://memory', 'w+');
++fputs($stream, "<\0\n?\n");
++rewind($stream);
++var_dump(fgetss($stream));
++var_dump(fgetss($stream));
++fclose($stream);
++?>
++--EXPECT--
++string(0) ""
++string(0) ""
++string(0) ""
++string(0) ""
++string(0) ""
++string(0) ""
-- 
cgit