This bug was fixed in the package dropbear - 2013.60-1ubuntu2.1
--------------- dropbear (2013.60-1ubuntu2.1) trusty; urgency=medium
* Enable hmac-sha2-256 and hmac-sha2-512 MAC algorithms (LP: #1409798) -- Richard Hansen <email address hidden> Wed, 04 Feb 2015 16:11:03 -0600
This bug was fixed in the package dropbear - 2013.60-1ubuntu2.1
--------------- 1ubuntu2. 1) trusty; urgency=medium
dropbear (2013.60-
* Enable hmac-sha2-256 and hmac-sha2-512 MAC algorithms (LP: #1409798)
-- Richard Hansen <email address hidden> Wed, 04 Feb 2015 16:11:03 -0600