openSUSE Security Update : dropbear (openSUSE-2016-918)

High Nessus Plugin ID 92654


The remote openSUSE host is missing a security update.


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


Update the affected dropbear packages.

See Also

Plugin Details

Severity: High

ID: 92654

File Name: openSUSE-2016-918.nasl

Version: $Revision: 2.1 $

Type: local

Agent: unix

Published: 2016/08/01

Modified: 2016/08/01

Dependencies: 12634

Risk Information

Risk Factor: High

Vulnerability Information

CPE: p-cpe:/a:novell:opensuse:dropbear, p-cpe:/a:novell:opensuse:dropbear-debuginfo, p-cpe:/a:novell:opensuse:dropbear-debugsource, cpe:/o:novell:opensuse:13.1

Required KB Items: Host/local_checks_enabled, Host/SuSE/release, Host/SuSE/rpm-list, Host/cpu

Patch Publication Date: 2016/07/31