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CSIRTUK ADVISORY - 3353 - iDefense - Advisories concerning vulnerabilities in IBM DB2 Universal Database

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Subject: CSIRTUK ADVISORY - 3353 - iDefense - Advisories concerning vulnerabilities in IBM DB2 Universal Database
From: "CSIRTUK" <CSIRTUK@xxxxxxxxxxxxxxx>
Date: Fri, 17 Aug 2007 10:42:41 +0100
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Thread-topic: CSIRTUK ADVISORY - 3353 - iDefense - Advisories concerning vulnerabilities in IBM DB2 Universal Database
________________________________________________________________________

CSIRTUK ADVISORY - 3353 dated 17.08.07 time 10:13

Centre for the Protection of National Infrastructure (CPNI)
________________________________________________________________________

 Further details about CPNI, including information about our products
can be
 found at www.cpni.gov.uk
________________________________________________________________________

Title
=====
iDefense Advisories concerning vulnerabilities in IBM DB2 Universal
Database

Detail
======
ID: 3353
Date: 17 August 2007 10:13

------------------------------------------------------------------------
--------
Title: 3353 - iDefense Advisories concerning vulnerabilities in IBM DB2
Universal Database
Abstract: Description of several vulnerabilities in IBM DB2 Universal
Database
Vendors affected:IBM
Operating Systems affected: Linux, Unix and Windows
Applications affected:DB2
Advisory type: Information
Warning Status: Information only
Potential Damage: Privilege escalation
Availability of fix: Available
Type of fix: Patch
Source: iDefense, Inc
Reliability of source: Trusted
Source URL: http://labs.idefense.com/intelligence/vulnerabilities/
CVE: CVE-2007-4271, CVE-2007-4272, CVE-2007-4273, CVE-2007-4275,
CVE-2007-4276, 

IBM DB2 Universal Database Directory Traversal Vulnerability

iDefense Security Advisory 08.16.07
http://labs.idefense.com/intelligence/vulnerabilities/
Aug 16, 2007

I. BACKGROUND

IBM Corp.'s DB2 Universal Database product is a large database server
product commonly used for high end databases. For more information,
visit the following URL.

http://ibm.com/db2/

II. DESCRIPTION

Local exploitation of a directory traversal vulnerability in IBM Corp.'s
DB2 Universal Database allows attackers to cause a denial of service
(DoS) condition or elevate privileges to root.

Some DB2 binaries that are installed setuid-root will save event
information to a log file. When creating the full path to the
destination file, an environment variable is concatenated with "/tmp/".
Since there is no checking for path traversal strings, such as "../",
within the environment variable, an attacker is able to create arbitrary
files on the system.

III. ANALYSIS

Exploitation allows local attackers to gain root privileges.

It should be noted that attackers do not appear to have any control over
the contents of the data written. As such, privilege escalation can
occur in combination with a vulnerability that relies on the ability to
create a specially crafted file name. Denying service to the machine is
trivial by writing to /etc/nologin or corrupting other critical system
files.

IV. DETECTION

iDefense confirmed the existence of this vulnerability in version 9.1
Fix Pack 2 of IBM Corp.'s DB2 Universal Database installed on a Linux
system. All prior versions, as well as builds for other UNIX-based
operating systems, are suspected to be vulnerable.

V. WORKAROUND

Setting more strict permissions on the DB2 instance directory can help
mitigate some of these vulnerabilities. Removing the setuid-bit from all
programs included with DB2 can also help mitigate exposure. Note, these
configuration changes have not been thoroughly tested and may cause
adverse behavior.

VI. VENDOR RESPONSE

IBM Corp. has addressed this vulnerability by releasing V9 Fix Pack 3
and version V8 FixPak 15 of its Universal Database product. More
information can be found at the following URLs.

V8: http://www-1.ibm.com/support/docview.wss?uid=swg21256235
V9: http://www-1.ibm.com/support/docview.wss?uid=swg21255572

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-4271 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

03/22/2007  Initial vendor notification
03/23/2007  Initial vendor response
08/16/2007  Coordinated public disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events http://labs.idefense.com/

X. LEGAL NOTICES

Copyright (c) 2007 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
e-mail customerservice@xxxxxxxxxxxx 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.

**********

IBM DB2 Universal Database Multiple File Creation Vulnerabilities

iDefense Security Advisory 08.16.07
http://labs.idefense.com/intelligence/vulnerabilities/
Aug 16, 2007

I. BACKGROUND

IBM Corp.'s DB2 Universal Database product is a large database server
product commonly used for high end databases. For more information,
visit the following URL.

http://ibm.com/db2/

II. DESCRIPTION

Local exploitation of multiple file creation vulnerabilities in IBM
Corp.'s DB2 Universal Database could allow attackers to elevate
privileges to the superuser.

These vulnerabilities are due to insufficient checking being performed
while handling files with elevated privileges. By setting certain
combinations of environment variables, an attacker is able to create or
append to arbitrary files on the system.

III. ANALYSIS

Exploitation allows local attackers to gain root privileges.

In at least one case, the attacker's umask will be honored when creating
files. In this case, the attacker could create world-writable root-owned
files anywhere on the system. By targeting specific system files, such
as /etc/ld.so.preload or various cron data file locations, an attacker
could execute arbitrary code with superuser privileges.

IV. DETECTION

iDefense confirmed the existence of this vulnerability in version 9.1
Fix Pack 2 of IBM Corp.'s DB2 Universal Database installed on a Linux
system. All prior versions, as well as builds for other UNIX-based
operating systems, are suspected to be vulnerable.

V. WORKAROUND

Setting more strict permissions on the DB2 instance directory can help
mitigate some of these vulnerabilities. Removing the setuid-bit from all
programs included with DB2 can also help mitigate exposure. Note, these
configuration changes have not been thoroughly tested and may cause
adverse behavior.

VI. VENDOR RESPONSE

IBM Corp. has addressed this vulnerability by releasing V9 Fix Pack 3
and version V8 FixPak 15 of its Universal Database product. More
information can be found at the following URLs.

V8: http://www-1.ibm.com/support/docview.wss?uid=swg21256235
V9: http://www-1.ibm.com/support/docview.wss?uid=swg21255572

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-4272 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

03/22/2007  Initial vendor notification
03/23/2007  Initial vendor response
08/16/2007  Coordinated public disclosure

IX. CREDIT

These vulnerabilities were discovered by Joshua J. Drake (iDefense Labs)
and an anonymous researcher.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events http://labs.idefense.com/

X. LEGAL NOTICES

Copyright (c) 2007 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
e-mail customerservice@xxxxxxxxxxxx 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.

**********

IBM DB2 Universal Database Directory Creation Vulnerability

iDefense Security Advisory 08.16.07
http://labs.idefense.com/intelligence/vulnerabilities/
Aug 16, 2007

I. BACKGROUND

IBM Corp.'s DB2 Universal Database product is a large database server
product commonly used for high end databases. For more information,
visit the following URL.

http://ibm.com/db2/

II. DESCRIPTION

Local exploitation of a directory creation vulnerability in IBM Corp.'s
DB2 Universal Database could allow attackers to elevate privileges to
the superuser.

This vulnerability exists due to insecure directory creation within
setuid-binaries included with DB2. While creating specific directory
structures, attacker created symbolic links will be followed. This
allows world-writable directories to be created anywhere on the file
system.

III. ANALYSIS

Exploitation allows local attackers to gain root privileges.

In order to execute arbitrary code, an attacker could create a
world-writable locale directory. By creating a specially crafted
localized message file, the attacker can cause a format string of their
choosing to be passed to a function in the printf(3) family. Using known
format string exploitation techniques, an attacker can then execute
arbitrary code as root. This should not be considered the only way to
gain root privileges with this vulnerability. However, iDefense has
confirmed this method in lab tests.

IV. DETECTION

iDefense confirmed the existence of this vulnerability in version 9.1
Fix Pack 2 of IBM Corp.'s DB2 Universal Database installed on a Linux
system. All prior versions, as well as builds for other UNIX-based
operating systems, are suspected to be vulnerable.

V. WORKAROUND

Setting more strict permissions on the DB2 instance directory can help
mitigate some of these vulnerabilities. Removing the setuid-bit from all
programs included with DB2 can also help mitigate exposure. Note, these
configuration changes have not been thoroughly tested and may cause
adverse behavior.

VI. VENDOR RESPONSE

IBM Corp. has addressed this vulnerability by releasing V9 Fix Pack 3
and version V8 FixPak 15 of its Universal Database product. More
information can be found at the following URLs.

V8: http://www-1.ibm.com/support/docview.wss?uid=swg21256235
V9: http://www-1.ibm.com/support/docview.wss?uid=swg21255572

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-4273 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

03/22/2007  Initial vendor notification
03/23/2007  Initial vendor response
08/16/2007  Coordinated public disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events http://labs.idefense.com/

X. LEGAL NOTICES

Copyright (c) 2007 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
e-mail customerservice@xxxxxxxxxxxx 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.

**********

IBM DB2 Universal Database Multiple Untrusted Search Path
Vulnerabilities

iDefense Security Advisory 08.16.07
http://labs.idefense.com/intelligence/vulnerabilities/
Aug 16, 2007

I. BACKGROUND

IBM Corp.'s DB2 Universal Database product is a large database server
product commonly used for high end databases. For more information,
visit the following URL.

http://ibm.com/db2/

II. DESCRIPTION

Local exploitation of multiple untrusted search path vulnerabilities in
IBM Corp.'s DB2 Universal Database could allow attackers to elevate
privileges to the superuser.

These vulnerabilities exist due to the execution of binaries or loading
of libraries within untrusted paths. In each case, the path to a binary
or library is generated based on an environment variable that is under
attacker control. Additionally, the files to be executed or loaded are
located in a directory under attacker control.

III. ANALYSIS

Exploitation allows local attackers to gain root privileges.

In cases where programs are executed, an attacker need only create a
specially crafted environment and file structure. In cases where a
library is loaded, creating a library containing a specially crafted
initialization section is sufficient.

In order to exploit some of these vulnerabilities, the attacker must be
a member of the "db2grp1" or a group corresponding with an installed
DB2 instance.

IV. DETECTION

iDefense confirmed the existence of this vulnerability in version 9.1
Fix Pack 2 of IBM Corp.'s DB2 Universal Database installed on a Linux
system. All prior versions, as well as builds for other UNIX-based
operating systems, are suspected to be vulnerable.

V. WORKAROUND

Setting more strict permissions on the DB2 instance directory can help
mitigate some of these vulnerabilities. Removing the setuid-bit from all
programs included with DB2 can also help mitigate exposure. Note, these
configuration changes have not been thoroughly tested and may cause
adverse behavior.

VI. VENDOR RESPONSE

IBM Corp. has addressed this vulnerability by releasing V9 Fix Pack 3
and version V8 FixPak 15 of its Universal Database product. More
information can be found at the following URLs.

V8: http://www-1.ibm.com/support/docview.wss?uid=swg21256235
V9: http://www-1.ibm.com/support/docview.wss?uid=swg21255572

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-4275 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

03/23/2007  Initial vendor notification
03/23/2007  Initial vendor response
08/16/2007  Coordinated public disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events http://labs.idefense.com/

X. LEGAL NOTICES

Copyright (c) 2007 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
e-mail customerservice@xxxxxxxxxxxx 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.

**********

IBM DB2 Universal Database buildDasPaths Buffer Overflow Vulnerability

iDefense Security Advisory 08.16.07
http://labs.idefense.com/intelligence/vulnerabilities/
Aug 16, 2007

I. BACKGROUND

IBM Corp.'s DB2 Universal Database product is a large database server
product commonly used for high end databases. For more information,
visit the following URL.

http://ibm.com/db2/

II. DESCRIPTION

Local exploitation of a buffer overflow vulnerability in IBM Corp.'s DB2
Universal Database could allow attackers to elevate privileges to the
superuser.

This vulnerability specifically exists due to insufficient validation of
the length of attacker supplied data. When an attacker specifies a
specially crafted string via certain environment variables, the string
is copied into a static sized buffer stored on the stack. By supplying
too much data, an attacker can overflow the buffer and overwrite
stack-stored execution control structures resulting in arbitrary code
execution.

III. ANALYSIS

Exploitation allows local attackers to gain root privileges.

Non-executable memory technology such as PaX, DEP, exec-shield, or other
NX or XD technology, can help prevent against exploitation of this type
vulnerability.

IV. DETECTION

iDefense confirmed the existence of this vulnerability in version 9.1
Fix Pack 2 of IBM Corp.'s DB2 Universal Database installed on a Linux
system. All prior versions, as well as builds for other UNIX-based
operating systems, are suspected to be vulnerable.

V. WORKAROUND

Setting more strict permissions on the DB2 instance directory can help
mitigate some of these vulnerabilities. Removing the setuid-bit from all
programs included with DB2 can also help mitigate exposure. Note, these
configuration changes have not been thoroughly tested and may cause
adverse behavior.

VI. VENDOR RESPONSE

IBM Corp. has addressed this vulnerability by releasing V9 Fix Pack 3
and version V8 FixPak 15 of its Universal Database product. More
information can be found at the following URLs.

V8: http://www-1.ibm.com/support/docview.wss?uid=swg21256235
V9: http://www-1.ibm.com/support/docview.wss?uid=swg21255572

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-4276 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

03/22/2007  Initial vendor notification
03/23/2007  Initial vendor response
08/16/2007  Coordinated public disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events http://labs.idefense.com/

X. LEGAL NOTICES

Copyright (c) 2007 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
e-mail customerservice@xxxxxxxxxxxx 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.

 


This advisory contains information released by the original author. Some
of the information may have changed since it was released. If the issue
affects you, it may be prudent to retrieve the advisory from the site of
the original source to ensure that you receive the most current
information concerning that problem. Reference to any specific
commercial product, process, or service by trade name, trademark
manufacturer, or otherwise, does not constitute or imply its
endorsement, recommendation, or favouring by CPNI. 

The views and opinions of authors expressed within this notice shall not
be used for advertising or product endorsement purposes. CPNI shall not
accept responsibility for any errors or omissions contained within this
advisory. In particular, they shall not be liable for any loss or damage
whatsoever, arising from or in connection with the usage of information
contained within this advisory.

CSIRTUK is a member of the Forum of Incident Response and Security Teams
(FIRST) and has contacts with other international Incident Response
Teams (IRTs) in order to foster cooperation and coordination in incident
prevention, to prompt rapid reaction to incidents, and to promote
information sharing amongst its members and the community at large. 

________________________________________________________________________

CPNI values your feedback.

1. Which of the following most reflects the value of the advisory to
you?
(Place an 'X' next to your choice)

Very useful:__ Useful:__ Not useful:__

2. If you did not find it useful, why not?


3. Any other comments? How could we improve our advisories?


Thank you for your contribution.

________________________________________________________________________

CSIRTUK wishes to acknowledge the contributions of iDefense & IBM for 
the information contained in this advisory.
________________________________________________________________________

This advisory contains information released by the original author. Some
of the
information may have changed since it was released. If the issue affects
you,
it may be prudent to retrieve the advisory from the site of the original
source to ensure that you receive the most current information
concerning that
problem.

Reference to any specific commercial product, process, or service by
trade
name, trademark manufacturer, or otherwise, does not constitute or imply
its
endorsement, recommendation, or favouring by CPNI. The views and
opinions of
authors expressed within this notice shall not be used for advertising
or
product endorsement purposes.

CPNI shall not accept responsibility for any errors or omissions
contained
within this advisory. In particular, they shall not be liable for any
loss or
damage whatsoever, arising from or in connection with the usage of
information
contained within this advisory.

CSIRTUK is a member of the Forum of Incident Response and Security Teams
(FIRST)
and has contacts with other international Incident Response Teams (IRTs)
in
order to foster cooperation and coordination in incident prevention, to
prompt
rapid reaction to incidents, and to promote information sharing amongst
its
members and the community at large.
________________________________________________________________________

<End of CPNI Advisory>


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