The dbclient and server in Dropbear SSH before 2016.74, when compiled with DEBUG_TRACE, allows local users to read process memory via the -v argument, related to a failed remote ident.
https://security.gentoo.org/glsa/201702-23
https://secure.ucc.asn.au/hg/dropbear/rev/6a14b1f6dc04
https://bugzilla.redhat.com/show_bug.cgi?id=1376353