openSUSE Security Update : dropbear (openSUSE-2016-912)

high Nessus Plugin ID 92598

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: 92598

File Name: openSUSE-2016-912.nasl

Version: 2.3

Type: local

Agent: unix

Published: 7/28/2016

Updated: 1/19/2021

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Nessus

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:13.2, cpe:/o:novell:opensuse:42.1

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

Patch Publication Date: 7/27/2016