diff -Nru libmemcached-1.0.18/debian/changelog libmemcached-1.0.18/debian/changelog
--- libmemcached-1.0.18/debian/changelog	2017-10-11 08:19:11.000000000 +0100
+++ libmemcached-1.0.18/debian/changelog	2019-01-17 15:33:09.000000000 +0000
@@ -1,3 +1,10 @@
+libmemcached (1.0.18-4.2ubuntu1) disco; urgency=medium
+
+  * Fix missing null termination in PROTOCOL_BINARY_CMD_SASL_LIST_MECHS
+    response handling (Closes: #1573594)
+
+ -- Ioanna Alifieraki <ioanna-maria.alifieraki@canonical.com>  Thu, 17 Jan 2019 15:33:09 +0000
+
 libmemcached (1.0.18-4.2) unstable; urgency=medium
 
   * Non-maintainer upload.
diff -Nru libmemcached-1.0.18/debian/patches/fix_missing_null_termination libmemcached-1.0.18/debian/patches/fix_missing_null_termination
--- libmemcached-1.0.18/debian/patches/fix_missing_null_termination	1970-01-01 01:00:00.000000000 +0100
+++ libmemcached-1.0.18/debian/patches/fix_missing_null_termination	2019-01-17 15:32:27.000000000 +0000
@@ -0,0 +1,16 @@
+Description: Fix missing null termination in PROTOCOL_BINARY_CMD_SASL_LIST_MECHS respond handling
+   * Fix missing null terminated buffer. Closes: #853497.
+Author: Ioanna Alifieraki <ioanna-maria.alifieraki@canonical.com>
+Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/libmemcached/+bug/1573594
+Last-Update: 2019-01-17
+
+--- libmemcached-1.0.18.orig/libmemcached/sasl.cc
++++ libmemcached-1.0.18/libmemcached/sasl.cc
+@@ -171,6 +171,7 @@ memcached_return_t memcached_sasl_authen
+   memcached_server_response_increment(server);
+ 
+   char mech[MEMCACHED_MAX_BUFFER];
++  memset(mech, 0, MEMCACHED_MAX_BUFFER);
+   memcached_return_t rc= memcached_response(server, mech, sizeof(mech), NULL);
+   if (memcached_failed(rc))
+   {
diff -Nru libmemcached-1.0.18/debian/patches/series libmemcached-1.0.18/debian/patches/series
--- libmemcached-1.0.18/debian/patches/series	2017-10-11 08:19:11.000000000 +0100
+++ libmemcached-1.0.18/debian/patches/series	2019-01-17 15:22:51.000000000 +0000
@@ -5,3 +5,4 @@
 move-ax_confix_aux_dir.patch
 no-docs-no-man.diff
 fix-gcc7-build.diff
+fix_missing_null_termination