diff --git a/Lib/xml/etree/ElementTree.py b/Lib/xml/etree/ElementTree.py
index 6c1345a..7ebba1c 100644
--- a/Lib/xml/etree/ElementTree.py
+++ b/Lib/xml/etree/ElementTree.py
@@ -1086,8 +1086,19 @@ def _escape_attrib(text):
             text = text.replace(">", ">")
         if "\"" in text:
             text = text.replace("\"", """)
+        # The following business with carriage returns is to satisfy
+        # Section 2.11 of the XML specification, stating that 
+        # CR or CR LN should be replaced with just LN
+        # http://www.w3.org/TR/REC-xml/#sec-line-ends
+        if "\r\n" in text:
+            text = text.replace("\r\n", "\n")
+        if "\r" in text:
+            text = text.replace("\r", "\n")
+        #The following four lines are issue 17582
         if "\n" in text:
             text = text.replace("\n", "
")
+        if "\t" in text:
+            text = text.replace("\t", "	")
         return text
     except (TypeError, AttributeError):
         _raise_serialization_error(text)