[ GLSA 200611-23 ] Mono: Insecure temporary file creation

[Raphael Marichez <falco () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200611-23
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Mono: Insecure temporary file creation
      Date: November 28, 2006
      Bugs: #150264
        ID: 200611-23

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Synopsis
========

Mono is vulnerable to linking attacks, potentially allowing a local
user to overwrite arbitrary files.

Background
==========

Mono provides the necessary software to develop and run .NET client and
server applications.

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

    -------------------------------------------------------------------
     Package        /   Vulnerable   /                      Unaffected
    -------------------------------------------------------------------
  1  dev-lang/mono     < 1.1.13.8.1                      >= 1.1.13.8.1

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

Sebastian Krahmer of the SuSE Security Team discovered that the
System.CodeDom.Compiler classes of Mono create temporary files with
insecure permissions.

Impact
======

A local attacker could create links in the temporary file directory,
pointing to a valid file somewhere on the filesystem. When an affected
class is called, this could 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 Mono users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-lang/mono-1.1.13.8.1"

References
==========

  [ 1 ] CVE-2006-5072
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5072

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

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

  http://security.gentoo.org/glsa/glsa-200611-23.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/2.5

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