This bug was fixed in the package dropbear - 2014.65-1ubuntu2
--------------- dropbear (2014.65-1ubuntu2) vivid; 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 - 2014.65-1ubuntu2
---------------
dropbear (2014.65-1ubuntu2) vivid; 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