GLSA 200512-13: Dropbear: Privilege escalation

http://security.gentoo.org/

Severity:	high
Title:	Dropbear: Privilege escalation
Date:	12/23/2005
Bugs:	#116006
ID:	200512-13

Synopsis

A buffer overflow in Dropbear could allow authenticated users to execute arbitrary code as the root user.

Background

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

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/dropbear	< 0.47	>= 0.47	All supported architectures

Description

Under certain conditions Dropbear could fail to allocate a sufficient amount of memory, possibly resulting in a buffer overflow.

Impact

By sending specially crafted data to the server, authenticated users could exploit this vulnerability to execute arbitrary code with the permissions of the SSH server user, which is the root user by default.

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-0.47"

References

CVE-2005-4178

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200512-13.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.