[原文]The sapdbwa_GetUserData function in MySQL MaxDB 188.8.131.52, and other versions before 184.108.40.206, allows remote attackers to cause a denial of service (crash) via invalid parameters to the WebDAV handler code, which triggers a null dereference that causes the SAP DB Web Agent to crash.
iDEFENSE Security Advisory 01.19.05 - Two remotely exploitable denial of service conditions have been found to exist in MySQL MaxDB and SAP DB Web Agent products. MaxDB 7.5.00.21 fixes these issues.
MySQL MaxDB Web Agent Multiple Denial of Service Vulnerabilities
iDEFENSE Security Advisory 01.19.05
January 19, 2005
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
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.
A remote attacker can send simple HTTP requests to cause MaxDB Web Agent
iDEFENSE has confirmed the existence of these vulnerabilities in MySQL
MaxDB 220.127.116.11 on Linux and Windows platforms. It is believed that all
versions prior to 18.104.22.168 are affected.
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:
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
following names to these issues:
MySQL MaxDB Web Agent Null HTTP Header Denial of Service Vulnerability
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
The discoverer of this vulnerability wishes to remain anonymous.
Get paid for vulnerability research
VII. LEGAL NOTICES
Copyright (c) 2005 iDEFENSE, Inc.
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDEFENSE. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically, please
email firstname.lastname@example.org for permission.
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
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,