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Gentoo Linux Security Advisory                           GLSA 200602-14
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: noweb: Insecure temporary file creation
      Date: February 26, 2006
      Bugs: #122705
        ID: 200602-14

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Synopsis
========

noweb is vulnerable to symlink attacks, potentially allowing a local
user to overwrite arbitrary files.

Background
==========

noweb is a simple, extensible, and language independent literate
programming tool.

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

    -------------------------------------------------------------------
     Package         /  Vulnerable  /                       Unaffected
    -------------------------------------------------------------------
  1  app-text/noweb      < 2.9-r5                            >= 2.9-r5

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

Javier Fernandez-Sanguino has discovered that the lib/toascii.nw and
shell/roff.mm scripts insecurely create temporary files with
predictable filenames.

Impact
======

A local attacker could create symbolic links in the temporary file
directory, pointing to a valid file somewhere on the filesystem. When
an affected script is called, this would result in the file being
overwritten with the rights of the user running the script.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All noweb users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-text/noweb-2.9-r5"

References
==========

  [ 1 ] CVE-2005-3342
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3342

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

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

  http://security.gentoo.org/glsa/glsa-200602-14.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 2006 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/2.0