Merge pull request #56 from Synse/fix-backslash-url-re

Fix catastrophic backtracking in BACKSLASH_URL_RE

Author: azazelm3dj3d

iocextract.py

@@ -94,25 +94,15 @@
 BACKSLASH_URL_RE = re.compile(r"""
         \b
         (
-            [\:\/\\\w\[\]\(\)-]+
-            (?:
-                \x20?
-                \\?\.
-                \x20?
-                \S*?
-            )*?
+            [\.\:\/\\\w\[\]\(\)-]+
             (?:
                 \x20?
-                \\\.
-                \x20?
-                \S*?
-            )
-            (?:
+                \\
                 \x20?
-                \\?\.
+                \.
                 \x20?
                 \S*?
-            )*
+            )+
         )
     """ + END_PUNCTUATION + r"""
         (?=\s|[^\x00-\x7F]|$)