Gentoo: 201310-17 pmake: Insecure temporary file usage
Posted by Benjamin D. Thomas   
Gentoo pmake uses temporary files in an insecure manner, allowing for symlink attacks.
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Gentoo Linux Security Advisory                           GLSA 201310-17
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                                            http://security.gentoo.org/
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 Severity: Low
    Title: pmake: Insecure temporary file usage
     Date: October 28, 2013
     Bugs: #367891
       ID: 201310-17

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Synopsis
========

pmake uses temporary files in an insecure manner, allowing for symlink
attacks.

Background
==========

pmake is Debian's version of NetBSD's make, a tool to build programs in
parallel.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-devel/pmake            < 1.111.3.1              >= 1.111.3.1

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

/usr/share/mk/bsd.lib.mk and /usr/share/mk/bsd.prog.mk create temporary
files insecurely, with predictable names (/tmp/_depend[PID]), and
without using $TMPDIR.

Impact
======

The make include files allow local users to overwrite arbitrary files
via a symlink attack.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All pmake users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-devel/pmake-1.111.3.1"

References
==========

[ 1 ] CVE-2011-1920
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-1920

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

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

 http://security.gentoo.org/glsa/glsa-201310-17.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.

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