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[ GLSA 200407-20 ] Subversion: Vulnerability in mod_authz_svn
From: "Joshua J. Berry" <condordes () gentoo org>
Date: Mon, 26 Jul 2004 11:26:37 -0700

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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

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