MySQL MaxDB Web Agent Multiple Denial of Service Vulnerabilities

iDEFENSE Security Advisory 01.19.05
www.idefense.com/application/poi/display?id=187&type=vulnerabilities
January 19, 2005

I. BACKGROUND

MaxDB by MySQL is a re-branded and enhanced version of SAP DB, SAP AG's
open source database. MaxDB is a heavy-duty, SAP-certified open source
database that offers high availability, scalability and a comprehensive
feature set. MaxDB complements the MySQL database server, targeted for
large mySAP ERP environments and other applications that require maximum
enterprise-level database functionality. Further details are available
at:

   http://www.mysql.com/products/maxdb/

II. DESCRIPTION

Two remotely exploitable denial of service conditions have been found to
exist in MySQL MaxDB and SAP DB Web Agent products.

The first vulnerability specifically exists due to a null pointer
dereference in the sapdbwa_GetUserData() function. A remote attacker can
request the webdav handler code with invalid parameters to cause a null
pointer dereference resulting in a crash of SAP DB Web Agent.

The second vulnerability is due to insufficient handling of malformed
HTTP headers. A remote attacker can submit a HTTP request with invalid
headers to cause a denial of service.

III. ANALYSIS

A remote attacker can send simple HTTP requests to cause MaxDB Web Agent
to crash.

IV. DETECTION

iDEFENSE has confirmed the existence of these vulnerabilities in MySQL 
MaxDB 7.5.0.0 on Linux and Windows platforms. It is believed that all
versions prior to 7.5.0.21 are affected. 

V. WORKAROUND

Employ firewalls, access control lists or other TCP/UDP restriction
mechanisms to limit access to administrative systems and services.

VI. VENDOR RESPONSE

The vulnerability has been addressed in MaxDB 7.5.00.21.

Updated binaries (version 7.5.00.23) are available from:

    http://dev.mysql.com/downloads/maxdb/7.5.00.html

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
following names to these issues:

CAN-2005-0081
MySQL MaxDB Web Agent Null HTTP Header Denial of Service Vulnerability

CAN-2005-0082
MySQL MaxDB Web Agent GetUserData Denial of Service Vulnerability

VIII. DISCLOSURE TIMELINE

08/20/2004   Initial vendor notification
08/24/2004   Initial vendor response
01/19/2005   Public disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

Get paid for vulnerability research
http://www.idefense.com/poi/teams/vcp.jsp

VII. LEGAL NOTICES

Copyright (c) 2005 iDEFENSE, Inc.

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Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
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