Subversion: Vulnerability in mod_authz_svn — GLSA 200407-20

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.

Affected Packages

dev-util/subversion on all architectures
Affected versions <= 1.0.4-r1
Unaffected versions >= 1.0.6


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.


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.


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.


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


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"


Release Date
July 26, 2004

Latest Revision
May 22, 2006: 02



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