[gentoo-announce] [ GLSA 201309-20 ] Dropbear: Multiple vulnerabilities

[news 28]

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Gentoo Linux Security Advisory GLSA 201309-20

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http://security.gentoo.org/

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Severity: Normal

Title: Dropbear: Multiple vulnerabilities

Date: September 26, 2013

Bugs: #328409, #405607

ID: 201309-20

 

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Synopsis

========

 

Multiple vulnerabilities have been found in Dropbear, the worst of

which could lead to arbitrary code execution.

 

Background

==========

 

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

footprint.

 

Affected packages

=================

 

-------------------------------------------------------------------

Package / Vulnerable / Unaffected

-------------------------------------------------------------------

1 net-misc/dropbear < 2012.55 >= 2012.55

 

Description

===========

 

Multiple vulnerabilities have been discovered in Dropbear. Please

review the CVE identifier and Gentoo bug referenced below for details.

 

Impact

======

 

A remote attacker could send a specially crafted request to trigger a

use-after-free condition, possibly resulting in arbitrary code

execution or a Denial of Service condition. Additionally, the bundled

version of libtommath has an error in its prime number generation,

which could result in the generation of weak keys.

 

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-2012.55"

 

References

==========

 

[ 1 ] CVE-2012-0920

http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0920

[ 2 ] libtommath Gentoo bug

https://bugs.gentoo.org/show_bug.cgi?id=328383

 

Availability

============

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-201309-20.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 ( -at -) gentoo.org or alternatively, you may file a bug at

https://bugs.gentoo.org.

 

License

=======

 

Copyright 2013 Gentoo Foundation, Inc; referenced text

belongs to its owner(s).

 

The contents of this document are licensed under the

Creative Commons - Attribution / Share Alike license.

 

http://creativecommons.org/licenses/by-sa/2.5