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Date: Wed, 14 Sep 2016 19:59:04 +0800
From: Matt Johnston <>
Subject: CVE request for Dropbear SSH <2016.74


Dropbear 2016.74 fixed security issues, can I please have 5
CVEs assigned. The first one has different exposure for
client/server parts so I assume it should have separate

(please CC replies)

2016.74 - 21 July 2016

- Security: 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.

  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.

- Security: dropbearconvert import of OpenSSH keys could run arbitrary code as
  the local dropbearconvert user when parsing malicious key files

- Security: 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.

- Security: dbclient or dropbear server could expose process memory to the
  running user if compiled with DEBUG_TRACE and running with -v

  The security issues were reported by an anonymous researcher working with
  Beyond Security's SecuriTeam Secure Disclosure

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