GLSA 200812-09 OpenSC: Insufficient protection of smart card PIN
Posted on: 12/10/2008 07:00 PM

A new security update has been released for Gentoo Linux - OpenSC: Insufficient protection of smart card PIN. Here the announcement:

Gentoo Linux Security Advisory GLSA 200812-09
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http://security.gentoo.org/
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Severity: Normal
Title: OpenSC: Insufficient protection of smart card PIN
Date: December 10, 2008
Bugs: #233543
ID: 200812-09

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Synopsis
========

Smart cards formatted using OpenSC do not sufficiently protect the PIN,
allowing attackers to reset it.

Background
==========

OpenSC is a smart card application that allows reading and writing via
PKCS#11.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/opensc lt; 0.11.6 gt;= 0.11.6

Description
===========

Chaskiel M Grundman reported that OpenSC uses weak permissions (ADMIN
file control information of 00) for the 5015 directory on smart cards
and USB crypto tokens running Siemens CardOS M4.

Impact
======

A physically proximate attacker can exploit this vulnerability to
change the PIN on a smart card and use it for authentication, leading
to privilege escalation.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSC users should upgrade to the latest version, and then check
and update their smart cards:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=dev-libs/opensc-0.11.6"
# pkcs15-tool --test-update
# pkcs15-tool --test-update --update

References
==========

[ 1 ] CVE-2008-2235
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2235

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200812-09.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
http://bugs.gentoo.org.

License
=======

Copyright 2008 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



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