Fix bug #68089 - do not accept options with embedded \0

Conflicts:
	ext/curl/interface.c

ext/curl/interface.c

@@ -169,6 +169,11 @@ static int php_curl_option_str(php_curl *ch, long option, const char *str, const
 {
 	CURLcode error = CURLE_OK;
 
+	if (strlen(str) != len) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Curl option contains invalid characters (\\0)");
+		return 0;
+	}
+
 #if LIBCURL_VERSION_NUM >= 0x071100
 	if (make_copy) {
 #endif

ext/curl/tests/bug68089.phpt

@@ -0,0 +1,18 @@
+--TEST--
+Bug #68089 (NULL byte injection - cURL lib)
+--SKIPIF--
+<?php 
+include 'skipif.inc';
+
+?>
+--FILE--
+<?php
+$url = "file:///etc/passwd\0http://google.com";
+$ch = curl_init();
+var_dump(curl_setopt($ch, CURLOPT_URL, $url));
+?>
+Done
+--EXPECTF--
+Warning: curl_setopt(): Curl option contains invalid characters (\0) in %s/bug68089.php on line 4
+bool(false)
+Done