openSUSE Security Update: Security update for dropbear ______________________________________________________________________________ Announcement ID: openSUSE-SU-2016:1891-1 Rating: critical References: #990363 Affected Products: openSUSE Leap 42.1 openSUSE 13.2 ______________________________________________________________________________ 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 Leap 42.1: zypper in -t patch openSUSE-2016-912=1 - openSUSE 13.2: zypper in -t patch openSUSE-2016-912=1 To bring your system up-to-date, use "zypper patch". Package List: - openSUSE Leap 42.1 (i586 x86_64): dropbear-2016.74-11.1 dropbear-debuginfo-2016.74-11.1 dropbear-debugsource-2016.74-11.1 - openSUSE 13.2 (i586 x86_64): dropbear-2016.74-2.6.1 dropbear-debuginfo-2016.74-2.6.1 dropbear-debugsource-2016.74-2.6.1 References: https://bugzilla.suse.com/990363