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

http://security.gentoo.org/

Severity:	normal
Title:	OpenSC: Insufficient protection of smart card PIN
Date:	12/10/2008
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	Architecture(s)
dev-libs/opensc	< 0.11.6	>= 0.11.6	All supported architectures

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

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 https://bugs.gentoo.org.