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Gentoo Linux Security Advisory                           GLSA 200407-20
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: Subversion: Vulnerability in mod_authz_svn
      Date: July 26, 2004
      Bugs: #57747
        ID: 200407-20

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Synopsis
========

Users with write access to parts of a Subversion repository may bypass
read restrictions in mod_authz_svn and read any part of the repository
they wish.

Background
==========

Subversion is an advanced version control system, similar to CVS, which
supports additional functionality such as the ability to move, copy and
delete files and directories. A Subversion server may be run as an
Apache module, a standalone server (svnserve), or on-demand over ssh (a
la CVS' ":ext:" protocol). The mod_authz_svn Apache module works
 with
Subversion in Apache to limit access to parts of Subversion
repositories based on policy set by the administrator.

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

    -------------------------------------------------------------------
     Package              /   Vulnerable   /                Unaffected
    -------------------------------------------------------------------
  1  dev-util/subversion      <= 1.0.4-r1                     >= 1.0.6

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

Users with write access to part of a Subversion repository may bypass
read restrictions on any part of that repository. This can be done
using an "svn copy" command to copy the portion of a repository the
user wishes to read into an area where they have write access.

Since copies are versioned, any such copy attempts will be readily
apparent.

Impact
======

This is a low-risk vulnerability. It affects only users of Subversion
who are running servers inside Apache and using mod_authz_svn.
Additionally, this vulnerability may be exploited only by users with
write access to some portion of a repository.

Workaround
==========

Keep sensitive content separated into different Subversion
repositories, or disable the Apache Subversion server and use svnserve
instead.

Resolution
==========

All Subversion users should upgrade to the latest available version:

    # emerge sync

    # emerge -pv ">=dev-util/subversion-1.0.6"
    # emerve ">=dev-util/subversion-1.0.6"

References
==========

  [ 1 ] ChangeLog for Subversion 1.0.6
        http://svn.collab.net/repos/svn/tags/1.0.6/CHANGES

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

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

    http://security.gentoo.org/glsa/glsa-200407-20.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 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