openSUSE Security Update: Security update for dropbear
______________________________________________________________________________

Announcement ID:    openSUSE-SU-2016:1917-1
Rating:             critical
References:         #990363 
Affected Products:
                    openSUSE 13.1
______________________________________________________________________________

   An update that contains security fixes can now be installed.

Description:

   This update for dropbear fixes four security issues (bnc#990363):

   - A format string injection vulnerability allowed remotes attacker to run
     arbitrary code as root if specific usernames including "%" symbols could
     be created on the target system. If a dbclient user can control
     usernames or host arguments, or untrusted input is processed,
     potentially arbitrary code could have been executed as the dbclient user.
   - When importing malicious OpenSSH key files via dropbearconvert,
     arbitrary code could have been executed as the local dropbearconvert user
   - If particular -m or -c arguments were provided, as used in scripts,
     dbclient could have executed arbitrary code
   - dbclient or dropbear server could have exposed process memory to the
     running user if compiled with DEBUG_TRACE and running with -v

   Dropbear was updated to the upstream 2016.74 release, including fixes for
   the following upstream issues:

   - Port forwarding failure when connecting to domains that have both IPv4
     and IPv6 addresses
   - 100% CPU use while waiting for rekey to complete
   - Fix crash when fallback initshells() is used scp failing when the local
     user doesn't exist

   The following upstream improvements are included:

   - Support syslog in dbclient, option -o usesyslog=yes
   - Kill a proxycommand when dbclient exits
   - Option to exit when a TCP forward fails
   - Allow specifying commands eg "dropbearmulti dbclient ..." instead of
     symlinks


Patch Instructions:

   To install this openSUSE Security Update use YaST online_update.
   Alternatively you can run the command listed for your product:

   - openSUSE 13.1:

      zypper in -t patch 2016-918=1

   To bring your system up-to-date, use "zypper patch".


Package List:

   - openSUSE 13.1 (i586 x86_64):

      dropbear-2016.74-2.10.1
      dropbear-debuginfo-2016.74-2.10.1
      dropbear-debugsource-2016.74-2.10.1


References:

   https://bugzilla.suse.com/990363