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

high Nessus Plugin ID 92654

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Synopsis

The remote openSUSE host is missing a security update.

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

Solution

Update the affected dropbear packages.

See Also

https://bugzilla.opensuse.org/show_bug.cgi?id=990363

Plugin Details

Severity: High

ID: 92654

File Name: openSUSE-2016-918.nasl

Version: 2.3

Type: Local

Agent: unix

Published: 8/1/2016

Updated: 1/19/2021

Supported Sensors: Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Vulnerability Information

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

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

Patch Publication Date: 7/31/2016