dbclient in Dropbear SSH client before 0.49 does not sufficiently warn the user when it detects a hostkey mismatch, which might allow remote attackers to conduct man-in-the-middle attacks.
https://exchange.xforce.ibmcloud.com/vulnerabilities/32762
http://www.vupen.com/english/advisories/2007/0785
http://www.securityfocus.com/bid/22761