[ GLSA 200812-09 ] OpenSC: Insufficient protection of smart card PIN

[Robert Buchholz <rbu () gentoo org>]

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200812-09
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: OpenSC: Insufficient protection of smart card PIN
      Date: December 10, 2008
      Bugs: #233543
        ID: 200812-09

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

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      < 0.11.6                           >= 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 ">=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

Attachment: signature.asc
Description: This is a digitally signed message part.