Add security bugs fixed in 5.5.18

Author: kaplanlior

NEWS

@@ -265,6 +265,15 @@ PHP                                                                        NEWS
   . Fixed bug #67633 (A foreach on an array returned from a function not doing
     copy-on-write). (Nikita)
   . Fixed bug #51800 (proc_open on Windows hangs forever). (Anatol)
+  . Fixed bug #68044 (Integer overflow in unserialize() (32-bits only)).
+    (CVE-2014-3669) (Stas)
+
+- cURL:
+  . Fixed bug #68089 (NULL byte injection - cURL lib). (Stas)
+
+- EXIF:
+  . Fixed bug #68113 (Heap corruption in exif_thumbnail()). (CVE-2014-3670)
+    (Stas)
 
 - FPM:
   . Fixed bug #65641 (PHP-FPM incorrectly defines the SCRIPT_NAME variable