full-disclosure - [ GLSA 200410-16 ] PostgreSQL: Insecure temporary file use in make_oidjoins

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From: koon at gentoo.org (Thierry Carrez)
Subject: [ GLSA 200410-16 ] PostgreSQL: Insecure temporary file use in make_oidjoins_check

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Gentoo Linux Security Advisory                           GLSA 200410-16
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: PostgreSQL: Insecure temporary file use in
            make_oidjoins_check
      Date: October 18, 2004
      Bugs: #66371
        ID: 200410-16

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Synopsis
========

The make_oidjoins_check script, part of the PostgreSQL package, is
vulnerable to symlink attacks, potentially allowing a local user to
overwrite arbitrary files with the rights of the user running the
utility.

Background
==========

PostgreSQL is an open source database based on the POSTGRES database
management system. It includes several contributed scripts including
the make_oidjoins_check script.

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

    -------------------------------------------------------------------
     Package            /   Vulnerable   /                  Unaffected
    -------------------------------------------------------------------
  1  dev-db/postgresql      <= 7.4.5-r1                    >= 7.4.5-r2
                                                          *>= 7.3.7-r2

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

The make_oidjoins_check script insecurely creates temporary files in
world-writeable directories with predictable names.

Impact
======

A local attacker could create symbolic links in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When
make_oidjoins_check is called, this would result in file overwrite with
the rights of the user running the utility, which could be the root
user.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All PostgreSQL users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=dev-db/postgresql-7.4.5-r2"
    # emerge ">=dev-db/postgresql-7.4.5-r2"

Upgrade notes: PostgreSQL 7.3.x users should upgrade to the latest
available 7.3.x version to retain database compatibility.

References
==========

  [ 1 ] Trustix Advisory #2004-0050
        http://www.trustix.org/errata/2004/0050/

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

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

  http://security.gentoo.org/glsa/glsa-200410-16.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@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 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/1.0

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