GLSA 201702-23: Dropbear: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Dropbear: Multiple vulnerabilities
Date:	02/20/2017
Bugs:	#605560
ID:	201702-23

Synopsis

Multiple vulnerabilities have been found in Dropbear, the worst of which allows remote attackers to execute arbitrary code.

Background

Dropbear is an SSH server and client designed with a small memory footprint.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/dropbear	< 2016.74	>= 2016.74	All supported architectures

Description

Multiple vulnerabilities have been discovered in Dropbear. Please review the CVE identifiers referenced below for details.

Impact

A remote attacker could possibly execute arbitrary code with root privileges if usernames containing special characters can be created on a system. Also, a dbclient user who can control username or host arguments could potentially run arbitrary code with the privileges of the process.

In addition, a remote attacker could entice a user to process a specially crafted SSH key using dropbearconvert, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All Dropbear users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=net-misc/dropbear-2016.74"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201702-23.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.