3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
104 lines
4 KiB
Text
104 lines
4 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
|
|
|
|
=============================================================================
|
|
FreeBSD-SA-02:03 Security Advisory
|
|
FreeBSD, Inc.
|
|
|
|
Topic: mod_auth_pgsql port authentication bypass
|
|
|
|
Category: ports
|
|
Module: mod_auth_pgsql
|
|
Announced: 2002-01-04
|
|
Credits: RUS CERT <URL:http://cert.uni-stuttgart.de/>
|
|
Affects: Ports collection prior to the correction date
|
|
Corrected: 2001-10-02 11:33:49 UTC
|
|
FreeBSD only: NO
|
|
|
|
I. Background
|
|
|
|
mod_auth_pgsql is an Apache module which allows the Apache web server
|
|
to use a PostgreSQL database for user and/or group authentication.
|
|
|
|
II. Problem Description
|
|
|
|
The mod_auth_pgsql port, versions prior to mod_auth_pgsql-0.9.9,
|
|
contain a vulnerability that may allow a remote user to cause
|
|
arbitrary SQL code to be execute. mod_auth_pgsql constructs a SQL
|
|
statement to be executed by the PostgreSQL server in order to lookup
|
|
user information. The username given by the remote user is inserted
|
|
into the SQL statement without any quoting or other safety checks.
|
|
|
|
The mod_auth_pgsql port is not installed by default, nor is it "part of
|
|
FreeBSD" as such: it is part of the FreeBSD ports collection, which
|
|
contains over 6000 third-party applications in a ready-to-install
|
|
format. The ports collection shipped with FreeBSD 4.4 contains this
|
|
problem since it was discovered after the release.
|
|
|
|
FreeBSD makes no claim about the security of these third-party
|
|
applications, although an effort is underway to provide a security
|
|
audit of the most security-critical ports.
|
|
|
|
III. Impact
|
|
|
|
A remote user may insert arbitrary SQL code into the username during
|
|
authentication, leading to several exploit opportunities. In
|
|
particular, the attacker may cause mod_auth_pgsql to use a known fixed
|
|
password hash for user verification, allowing him to authenticate as
|
|
any user and obtain unauthorized access to web server data.
|
|
|
|
IV. Workaround
|
|
|
|
1) Deinstall the mod_auth_pgsql port/package if you have it installed.
|
|
|
|
V. Solution
|
|
|
|
1) Upgrade your entire ports collection and rebuild the port.
|
|
|
|
2) Deinstall the old package and install a new package dated after the
|
|
correction date, obtained from the following directories:
|
|
|
|
[i386]
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/www/mod_auth_pgsql-0.9.9.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/www/mod_auth_pgsql-0.9.9.tgz
|
|
|
|
[alpha]
|
|
Packages are not automatically generated for the alpha architecture at
|
|
this time due to lack of build resources.
|
|
|
|
3) Download a new port skeleton for the mod_auth_pgsql port from:
|
|
|
|
http://www.freebsd.org/ports/
|
|
|
|
and use it to rebuild the port.
|
|
|
|
4) Use the portcheckout utility to automate option (3) above. The
|
|
portcheckout port is available in /usr/ports/devel/portcheckout or the
|
|
package can be obtained from:
|
|
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
|
|
|
|
VI. Correction details
|
|
|
|
The following list contains the $FreeBSD$ revision numbers of each
|
|
file that was corrected in the FreeBSD source
|
|
|
|
Path Revision
|
|
- -------------------------------------------------------------------------
|
|
ports/www/mod_auth_pgsql/Makefile 1.3
|
|
ports/www/mod_auth_pgsql/distinfo 1.2
|
|
- -------------------------------------------------------------------------
|
|
|
|
VII. References
|
|
|
|
<URL:http://cert.uni-stuttgart.de/advisories/apache_auth.php>
|
|
-----BEGIN PGP SIGNATURE-----
|
|
Version: GnuPG v1.0.6 (FreeBSD)
|
|
Comment: For info see http://www.gnupg.org
|
|
|
|
iQCVAwUBPDZOBVUuHi5z0oilAQHfNgQAgp9FKI4P0XfSzBdbcdOnqPCBJji4TPLS
|
|
gENpCcvT55dWcGjYr0XsJrsk1NhF3Qq0TR8CnN2OmWaxx1ugoqwdc6o0vqzYIQ5H
|
|
DAwBK4tbYOBYmram7A+0VBbTxPlHTnTop56i3/w2xaxafMHdlrzB2zCO7pimU83i
|
|
2MAKa0dLwS4=
|
|
=l5iu
|
|
-----END PGP SIGNATURE-----
|