Subversion 'mod_authz_svn' Access Control Bypass Vulnerabilities

BID:10800

Info

Subversion 'mod_authz_svn' Access Control Bypass Vulnerabilities

Bugtraq ID: 10800
Class: Access Validation Error
CVE: CVE-2004-1438
Remote: Yes
Local: No
Published: Jul 26 2004 12:00AM
Updated: Jul 12 2009 06:16AM
Credit: Ben Collins-Sussman reported these issues to the vendor.
Vulnerable: Subversion Subversion 1.0.5
Subversion Subversion 1.0.4
Subversion Subversion 1.0.3
Subversion Subversion 1.0.2
Subversion Subversion 1.0.1
Subversion Subversion 1.0
Redhat Fedora Core2
Gentoo Linux 1.4
Not Vulnerable: Subversion Subversion 1.1 .0-rc1
Subversion Subversion 1.0.6

Discussion

Subversion 'mod_authz_svn' Access Control Bypass Vulnerabilities

Subversion is reported to contain access control bypass vulnerabilities in its 'mod_authz_svn' Apache module.

These access control vulnerabilities present themselves when users have mixed access to a repository.

These vulnerabilities exist in several server operations, such as COPY and DELETE. These operations fail to properly implement the operator assigned access controls, allowing users improper access to repositories.

These issues are only present when using the WebDAV access method with the Apache 'mod_authz_svn' module, with the 'AuthzSVNAccessFile' configuration directive.

The vulnerabilities are present in version 1.0.5 and prior. Versions 1.0.6 and 1.1.0-rc1 have been released to address these vulnerabilities.

Exploit / POC

Subversion 'mod_authz_svn' Access Control Bypass Vulnerabilities

No exploit is required.

Solution / Fix

Subversion 'mod_authz_svn' Access Control Bypass Vulnerabilities

Solution:
The vendor has released version 1.0.6 and 1.1.0-rc1 that are immune to these issues.

RedHat Linux has released advisory FEDORA-2004-231 that addresses this issue for Fedore Core 2. Please see the referenced advisory for further information.

Gentoo Linux has released advisory GLSA 200407-20 addressing this issue. Please see the referenced advisory for further information. Users of affected packages are urged to execute the following with superuser privileges:
emerge sync
emerge -pv ">=dev-util/subversion-1.0.6"
emerge ">=dev-util/subversion-1.0.6"


Subversion Subversion 1.0

Subversion Subversion 1.0.1

Subversion Subversion 1.0.2

Subversion Subversion 1.0.3

Subversion Subversion 1.0.4

Subversion Subversion 1.0.5

References

Subversion 'mod_authz_svn' Access Control Bypass Vulnerabilities

References:

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