[ GLSA 202107-10 ] TCG TPM2 Software Stack: Information disclosure

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Gentoo Linux Security Advisory                           GLSA 202107-10
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: TCG TPM2 Software Stack: Information disclosure
     Date: July 07, 2021
     Bugs: #746563
       ID: 202107-10

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Synopsis
========

A bug in TCG TPM2 Software Stack may result in information disclosure
to a local attacker.

Background
==========

TCG TPM2 Software Stack is a library to interface with trusted platform
modules.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-crypt/tpm2-tss           < 2.4.3                    >= 2.4.3

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

TCG TPM2 Software Stack did not appropriately apply FAPI policies to
protect data encrypted with the trusted platform module.

Impact
======

Data encrypted using TCG TPM2 Software Stack (tpm2-tss) may not be
protected from an attacker.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All tpm2-tss users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-crypt/tpm2-tss-2.4.3"

References
==========

[ 1 ] CVE-2020-24455
      https://nvd.nist.gov/vuln/detail/CVE-2020-24455

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

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

 https://security.gentoo.org/glsa/202107-10

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
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2021 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.

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

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