[ GLSA 200501-38 ] Perl: rmtree and DBI tmpfile vulnerabilities

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200501-38
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Perl: rmtree and DBI tmpfile vulnerabilities
      Date: January 26, 2005
      Bugs: #78634, #75696
        ID: 200501-38

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Synopsis
========

The Perl DBI library and File::Path::rmtree function are vulnerable to
symlink attacks.

Background
==========

Perl is a cross platform programming language. The DBI is the standard
database interface module for Perl.

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

    -------------------------------------------------------------------
     Package        /   Vulnerable   /                      Unaffected
    -------------------------------------------------------------------
  1  dev-perl/dbi         <= 1.38                          *>= 1.37-r1
                                                            >= 1.38-r1
  2  dev-lang/perl      <= 5.8.6-r1                        >= 5.8.6-r2
                                                          *>= 5.8.5-r3
                                                          *>= 5.8.4-r2
                                                          *>= 5.8.2-r2
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Javier Fernandez-Sanguino Pena discovered that the DBI library creates
temporary files in an insecure, predictable way (CAN-2005-0077). Paul
Szabo found out that "File::Path::rmtree" also handles temporary files
insecurely (CAN-2004-0452).

Impact
======

A local attacker could create symbolic links in the temporary files
directory that point to a valid file somewhere on the filesystem. When
the DBI library or File::Path::rmtree is executed, this could be used
to overwrite files with the rights of the user calling these functions.

Workaround
==========

There are no known workarounds at this time.

Resolution
==========

All Perl users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose dev-lang/perl

All DBI library users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose dev-perl/dbi

References
==========

  [ 1 ] CAN-2005-0077
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0077
  [ 2 ] CAN-2004-0452
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0452

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

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

  http://security.gentoo.org/glsa/glsa-200501-38.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 2005 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

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