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AUSCERT External Security Bulletin Redistribution
ESB-2005.0336 -- iDEFENSE Security Advisory 04.25.05
Multiple MySQL MaxDB Webtool Remote Vulnerabilities
26 April 2005
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AusCERT Security Bulletin Summary
---------------------------------
Product: MySQL MaxDB
Publisher: iDEFENSE
Operating System: Linux variants
UNIX variants
Windows
Impact: Administrator Compromise
Access: Remote/Unauthenticated
CVE Names: CAN-2005-0684
Original Bulletin:
http://www.idefense.com/application/poi/display?id=234&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=235&type=vulnerabilities
Comment: This ESB contains two iDEFENSE advisories relating to stack
overflow vulnerabilities in the web administration service of MaxDB.
Both vulnerabilities have been fixed in MaxDB v7.5.00.26
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MySQL MaxDB Webtool Remote Stack Overflow Vulnerability
iDEFENSE Security Advisory 04.25.05
http://www.idefense.com/application/poi/display?id=234&type=vulnerabilities
April 25, 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.
II. DESCRIPTION
Remote exploitation of a stack-based buffer overflow vulnerability in
MySQL MaxDB could allow attackers to execute arbitrary code.
The vulnerability specifically exists due to improper handling of HTTP
GET queries containing a percent sign (%). When an attacker issues an
HTTP GET request specifying a percent sign followed by a long string as
the file parameter, a stack-based overflow occurs. Although exceptions
within the process can be raised with smaller strings, it is necessary
to provide a string of approximately 4,000 bytes in length to overwrite
the process Structured Exception Handler (SEH). Using this method, is
possible to gain control of execution flow and execute arbitrary code.
It is also possible to simply overwrite the program's saved instruction
pointer. However, it would be necessary to provide several valid
pointers in the buffer along the way in order to avoid premature
exceptions.
III. ANALYSIS
Successful exploitation of the vulnerability can allow remote attackers
to execute code with SYSTEM privileges. Note that the vulnerability is
in the web administration service, which should be configured not to
allow connections from untrusted hosts or listen on public-facing
network interfaces.
IV. DETECTION
iDEFENSE has confirmed the existence of this vulnerability in MySQL
MaxDB 7.5.00.23.
V. WORKAROUND
Employ firewalls, access control lists or other TCP/UDP restriction
mechanism to limit access to administrative systems and services.
VI. VENDOR RESPONSE
This vulnerability is addressed in MySQL MaxDB 7.5.00.26 available for
download at:
http://dev.mysql.com/downloads/maxdb/7.5.00.html
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CAN-2005-0684 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org), which standardizes names for
security problems. This is one of two vulnerabilities that have been
assigned CAN-2005-0684.
VIII. DISCLOSURE TIMELINE
03/08/2005 Initial vendor notification
03/11/2005 Initial vendor response
04/25/2005 Coordinated 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
Free tools, research and upcoming events
http://labs.idefense.com
X. 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 customerservice@idefense.com 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,
this information.
- ---------------------------------------------------------------------------
MySQL MaxDB Webtool Remote Lock-Token Stack Overflow Vulnerability
iDEFENSE Security Advisory 04.25.05
http://www.idefense.com/application/poi/display?id=235&type=vulnerabilities
April 25, 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.
II. DESCRIPTION
Remote exploitation of a stack-based buffer overflow vulnerability in
MySQL MaxDB could allow attackers to execute arbitrary code.
The vulnerability specifically exists due to a lack of bounds checking
in the WebDAV functionality of the web tool. When an attacker issues an
HTTP request with the unlock method, along with a long Lock-Token
string, a stack-based overflow occurs. The offending code follows:
MaxDB_ORG/sys/src/SAPDB/WebDAV/Handler/WDVHandler_CommonUtils.c:
WDVH_Bool getLockTokenHeader(sapdbwa_HttpRequestP request,
WDVH_Char *sLockToken,
WDVH_Char *errormsg)
{
WDVH_Char *temp1, *temp2, *temp4, *temp5;
WDVH_UInt4 length;
WDVH_Char temp3[WDVH_MAX_IF_HEADER_LEN];
if (request==NULL || sLockToken==NULL || errormsg==NULL)
return WDVH_False;
temp4 = (char*)sapdbwa_GetHeader(request,"Lock-Token");
if (temp4 != NULL) {
strcpy(temp3,temp4);
[...]
The variable temp3 is a fixed-length stack buffer. The function
sapdbwa_GetHeader() returns the user supplied value for Lock-Token. This
user-supplied value is then copied into the fixed-size buffer using a
strcpy() call. Due to no boundary checking, it is possible to overflow
the stack buffer and overwrite stack memory, ultimately leading to
control of execution flow and execution of arbitrary code.
III. ANALYSIS
Successful exploitation of the vulnerability can allow remote attackers
to execute code with SYSTEM privileges. Note that the vulnerability is
in the web administration service, which should be configured to not
allow connections from untrusted hosts or listening on public-facing
network interfaces.
IV. DETECTION
iDEFENSE has confirmed the existence of this vulnerability in MySQL
MaxDB 7.5.00.23.
V. WORKAROUND
Employ firewalls, access control lists or other TCP/UDP-restriction
mechanisms to limit access to administrative systems and services.
VI. VENDOR RESPONSE
This vulnerability is addressed in MySQL MaxDB 7.5.00.26 available for
download at:
http://dev.mysql.com/downloads/maxdb/7.5.00.html
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CAN-2005-0684 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org), which standardizes names for
security problems. This is one of two vulnerabilities that have been
assigned CAN-2005-0684.
VIII. DISCLOSURE TIMELINE
03/08/2005 Initial vendor notification
03/11/2005 Initial vendor response
04/25/2005 Coordinated 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
Free tools, research and upcoming events
http://labs.idefense.com
X. 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 customerservice@idefense.com 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,
this information.
- --------------------------END INCLUDED TEXT--------------------
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