From: Lars Strojny <lstrojny@php.net>
Date: Thu, 30 Oct 2008 14:22:21 +0000 (+0000)
Subject: The real fix for the gettext overflow bug
X-Git-Tag: BEFORE_HEAD_NS_CHANGE~129
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6d2dfa4eb047d9a2463ee3873ecea06f6e94fa94;p=php

The real fix for the gettext overflow bug
 - The overflow issue was not limited to domains, but also present for msgids
 - [DOC] msgids are now limited to 4096 chars, domains to 1024
---

diff --git a/ext/gettext/gettext.c b/ext/gettext/gettext.c
index bc957bfa53..67687bd1af 100644
--- a/ext/gettext/gettext.c
+++ b/ext/gettext/gettext.c
@@ -136,12 +136,35 @@ ZEND_GET_MODULE(php_gettext)
 #endif
 
 #define PHP_GETTEXT_MAX_DOMAIN_LENGTH 1024
+#define PHP_GETTEXT_MAX_MSGID_LENGTH 4096
+
 #define PHP_GETTEXT_DOMAIN_LENGTH_CHECK \
 	if (domain_len > PHP_GETTEXT_MAX_DOMAIN_LENGTH) { \
 		php_error_docref(NULL TSRMLS_CC, E_WARNING, "domain passed too long"); \
 		RETURN_FALSE; \
 	}
 
+#define PHP_GETTEXT_MSGID_LENGTH_CHECK \
+	char *check_name = "msgid"; \
+	int check_len   = msgid_len; \
+	PHP_GETTEXT_LENGTH_CHECK
+
+#define PHP_GETTEXT_LENGTH_CHECK \
+	if (check_len > PHP_GETTEXT_MAX_MSGID_LENGTH) { \
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s passed too long", check_name); \
+		RETURN_FALSE; \
+	}
+
+#define PHP_GETTEXT_MULTI_MSGID_LENGTH_CHECK \
+	int check_len; \
+	char *check_name; \
+	check_name = "msgid1"; \
+	check_len = msgid_len1; \
+	PHP_GETTEXT_LENGTH_CHECK \
+	check_name = "msgid2"; \
+	check_len = msgid_len2; \
+	PHP_GETTEXT_LENGTH_CHECK
+
 PHP_MINFO_FUNCTION(php_gettext)
 {
 	php_info_print_table_start();
@@ -184,10 +207,13 @@ PHP_NAMED_FUNCTION(zif_gettext)
 {
 	char *msgid_str;
 	int msgid_len;
-	
+
 	if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s&", &msgid_str, &msgid_len, UG(ascii_conv))) {
 		return;
 	}
+
+	PHP_GETTEXT_MSGID_LENGTH_CHECK
+
 	RETURN_STRING(gettext(msgid_str), ZSTR_DUPLICATE);
 }
 /* }}} */
@@ -204,6 +230,7 @@ PHP_NAMED_FUNCTION(zif_dgettext)
 	}
 
 	PHP_GETTEXT_DOMAIN_LENGTH_CHECK
+	PHP_GETTEXT_MSGID_LENGTH_CHECK
 
 	RETURN_STRING(dgettext(domain_str, msgid_str), ZSTR_DUPLICATE);
 }
@@ -222,6 +249,7 @@ PHP_NAMED_FUNCTION(zif_dcgettext)
 	}
 
 	PHP_GETTEXT_DOMAIN_LENGTH_CHECK
+	PHP_GETTEXT_MSGID_LENGTH_CHECK
 
 	RETURN_STRING(dcgettext(domain_str, msgid_str, category), ZSTR_DUPLICATE);
 }
@@ -263,11 +291,13 @@ PHP_NAMED_FUNCTION(zif_ngettext)
 	char *msgid_str1, *msgid_str2, *msgstr;
 	int msgid_len1, msgid_len2;
 	long count;
-	
+
 	if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s&s&l", &msgid_str1, &msgid_len1, UG(ascii_conv), &msgid_str2, &msgid_len2, UG(ascii_conv), &count)) {
 		RETURN_FALSE;
 	}
-	
+
+	PHP_GETTEXT_MULTI_MSGID_LENGTH_CHECK
+
 	if ((msgstr = ngettext(msgid_str1, msgid_str2, count))) {
 		RETURN_STRING(msgstr, ZSTR_DUPLICATE);
 	} else {
@@ -291,6 +321,7 @@ PHP_NAMED_FUNCTION(zif_dngettext)
 	}
 
 	PHP_GETTEXT_DOMAIN_LENGTH_CHECK
+	PHP_GETTEXT_MULTI_MSGID_LENGTH_CHECK
 
 	if ((msgstr = dngettext(domain_str, msgid_str1, msgid_str2, count))) {
 		RETURN_STRING(msgstr, ZSTR_DUPLICATE);
@@ -315,6 +346,7 @@ PHP_NAMED_FUNCTION(zif_dcngettext)
 	}
 
 	PHP_GETTEXT_DOMAIN_LENGTH_CHECK
+	PHP_GETTEXT_MULTI_MSGID_LENGTH_CHECK
 
 	if ((msgstr = dcngettext(domain_str, msgid_str1, msgid_str2, count, category))) {
 		RETURN_STRING(msgstr, ZSTR_DUPLICATE);
diff --git a/ext/gettext/tests/44938.phpt b/ext/gettext/tests/44938.phpt
new file mode 100644
index 0000000000..f2d594aa5c
--- /dev/null
+++ b/ext/gettext/tests/44938.phpt
@@ -0,0 +1,85 @@
+--TEST--
+#44938: gettext functions crash with overlong strings
+--SKIPIF--
+<?php
+if (!extension_loaded("gettext")) {
+	die("skip\n");
+}
+--FILE--
+<?php
+$overflown = str_repeat('C', 8476509);
+$msgid     = "msgid";
+$domain    = "domain";
+$category  = "cat";
+
+var_dump(bindtextdomain($overflown, 'path'));
+
+var_dump(dngettext($overflown, $msgid, $msgid, 1));
+var_dump(dngettext($domain, $overflown, $msgid, 1));
+var_dump(dngettext($domain, $msgid, $overflown, 1));
+
+var_dump(gettext($overflown));
+
+var_dump(ngettext($overflown, $msgid, -1));
+var_dump(ngettext($msgid, $overflown, -1));
+
+var_dump(dcgettext($overflown, $msgid, -1));
+var_dump(dcgettext($domain, $overflown, -1));
+
+var_dump(dcngettext($overflown, $msgid, $msgid, -1, -1));
+var_dump(dcngettext($domain, $overflown, $msgid, -1, -1));
+var_dump(dcngettext($domain, $msgid, $overflown, -1, -1));
+
+var_dump(dgettext($overflown, $msgid));
+var_dump(dgettext($domain, $overflown));
+
+var_dump(textdomain($overflown));
+?>
+==DONE==
+--EXPECTF--
+
+Warning: bindtextdomain(): domain passed too long in %s on line %d
+bool(false)
+
+Warning: dngettext(): domain passed too long in %s on line %d
+bool(false)
+
+Warning: dngettext(): msgid1 passed too long in %s on line %d
+bool(false)
+
+Warning: dngettext(): msgid2 passed too long in %s on line %d
+bool(false)
+
+Warning: gettext(): msgid passed too long in %s on line %d
+bool(false)
+
+Warning: ngettext(): msgid1 passed too long in %s on line %d
+bool(false)
+
+Warning: ngettext(): msgid2 passed too long in %s on line %d
+bool(false)
+
+Warning: dcgettext(): domain passed too long in %s on line %d
+bool(false)
+
+Warning: dcgettext(): msgid passed too long in %s on line %d
+bool(false)
+
+Warning: dcngettext(): domain passed too long in %s on line %d
+bool(false)
+
+Warning: dcngettext(): msgid1 passed too long in %s on line %d
+bool(false)
+
+Warning: dcngettext(): msgid2 passed too long in %s on line %d
+bool(false)
+
+Warning: dgettext(): domain passed too long in %s on line %d
+bool(false)
+
+Warning: dgettext(): msgid passed too long in %s on line %d
+bool(false)
+
+Warning: textdomain(): domain passed too long in %s on line %d
+bool(false)
+==DONE==