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
Applications affected:DB2
Warning Status: Imminent
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 © 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@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.
**********
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 © 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@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.
**********
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 © 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@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.
**********
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 © 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@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.
**********
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 © 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@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.
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.
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