Description
Message printout was vulnerable to format string injection.
If specific usernames including "%" symbols can be created on a system
(validated by getpwnam()) then an attacker could run arbitrary code as
root when connecting to Dropbear server. Also, a dbclient user who can
control username or host arguments could potentially run arbitrary code
as the dbclient user. This could be a problem if scripts or webpages
pass untrusted input to the dbclient program (CVE-2016-7406).
dropbearconvert import of OpenSSH keys could run arbitrary code as the
local dropbearconvert user when parsing malicious key files
(CVE-2016-7607).
dbclient could run arbitrary code as the local dbclient user if
particular -m or -c arguments are provided. This could be an issue where
dbclient is used in scripts (CVE-2016-7408).