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Re: Subversion 1.0.8 released. *SECURITY FIX*

From: Branko ─îibej <brane_at_xbc.nu>
Date: 2004-09-30 02:42:38 CEST

I've uploaded a new set of the 1.0.8 Win32 binaries, development
libraries and Python bindings:

  http://subversion.tigris.org/files/documents/15/17283/svn-win32-1.0.8.zip
  http://subversion.tigris.org/files/documents/15/17293/svn-win32-1.0.8_dev.zip
  http://subversion.tigris.org/files/documents/15/17281/svn-win32-1.0.8_pdb.7z
  http://subversion.tigris.org/files/documents/15/17292/svn-win32-1.0.8_py.zip

The MD5 checksums are:

  62c59a6d43e4d1d8f50cabbd50b7530b svn-win32-1.0.8.zip
  5d1c0aa75c896cad48a45649f4028320 svn-win32-1.0.8_dev.zip
  b01005d709788da422621cd68590d4e3 svn-win32-1.0.8_pdb.7z
  ddb90fda3b1ca9af174c5b7510997c4f svn-win32-1.0.8_py.zip

These binaries use statically-linked apr, apr-iconv and apr-util.

Ben Reser wrote:

>Subversion 1.0.8 is ready. Grab it from:
>
> http://subversion.tigris.org/tarballs/subversion-1.0.8.tar.gz
> http://subversion.tigris.org/tarballs/subversion-1.0.8.tar.bz2
> http://subversion.tigris.org/tarballs/subversion-1.0.8.zip
>
>The MD5 checksums are:
>
> 40b5b5edd4e0daec802661cd64d562e4 subversion-1.0.8.tar.gz
> b2378b7d9d00653249877531a61ef1db subversion-1.0.8.tar.bz2
> 9fec445c8ffdad08cd89515c62de9c4d subversion-1.0.8.zip
>
>PGP Signatures are available at:
> http://subversion.tigris.org/tarballs/subversion-1.0.8.tar.gz.asc
> http://subversion.tigris.org/tarballs/subversion-1.0.8.tar.bz2.asc
> http://subversion.tigris.org/tarballs/subversion-1.0.8.zip.asc
>
>PGP Signatures will be made by the following person(s) for this release:
> Ben Reser [1024D/641E358B] with fingerprint:
> 42F5 91FD E577 F545 FB40 8F6B 7241 856B 641E 358B
>
>
>This release fixes a security flaw. mod_authz_svn, the Apache httpd
>module which does path-based authorization on Subversion repositories,
> is not correctly protecting all metadata on unreadable paths.
>
>This metadata leakage affects the mod_authz_svn module in all released
>versions of Subversion (through 1.0.7), as well as the 1.1-rc1, -rc2
>and -rc3 release candidates. The leakage is fixed in the 1.0.8 and
>1.1-rc4 release, as well as the upcoming 1.1 final release.
>
>
>Details:
>=======
>
>If a Subversion commit affects paths that an administrator has marked
>"unreadable" using mod_authz_svn, then
>
> - "svn log -v" will list the existence of the unreadable paths;
> - "svn log -v" will show the commit's log message, which might be
> considered sensitive metadata in some situations;
> - "svn propget" is also able to fetch the log message of any commit;
> - "svn blame" and other commands that follow renames are able to
> acknowledge the existence of earlier versions of
> files that exist at unreadable locations.
>
>Severity:
>========
>
>Mild-to-medium severity, depending on your situation.
>
>This security issue is not about revealing the contents of protected
>files: it only reveals metadata about protected areas such as paths
>and log messages. This may or may not be important to your
>organization, depending on how you're using path-based authorization,
>and the sensitivity of the metadata.
>
>(Exception: in the case of "svn blame", and only in svn 1.1-rc2 and
>-rc3, it's possible that older unreadable versions of a file are being
>transported from server to client; the contents aren't displayed, but
>the data is still traveling over the network.)
>
>These issues only affects users of mod_authz_svn, not people using
>native httpd.conf directives (such as <Limit> or <LimitExcept>)
>directives to limit general readability on whole repositories.
>
>
>Workarounds:
>===========
>
>* Use mod_authz_svn to restrict writes only, not reads.
>
>* Break unreadable areas into separate repositories, and use native
> apache httpd.conf directives to make them unreadable.
>
>
>References:
>==========
>
> CAN-2004-0749: mod_authz_svn fails to protect metadata
>
>Recommendation:
>==============
>
>We recommend an upgrade to 1.0.8 or 1.1.0-rc4.
>
>Thanks,
>-The Subversion Team
>
>--------------------8-<-------cut-here---------8-<-----------------------
>
> User-visible-changes:
> * fixed: mod_authz_svn path and log-message metadata leaks.
> See CAN-2004-0749, and descriptive advisory at
> http://subversion.tigris.org/security/CAN-2004-0749-advisory.txt
>
-- Brane

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Received on Thu Sep 30 02:45:58 2004

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