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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0130 -- [Win][Linux][HP-UX][Solaris][AIX] IBM DB2 Universal Database - Two Vulnerabilities 13 February 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM DB2 Universal Database Administration Server IBM DB2 Universal Database db2pd Publisher: iDEFENSE Operating System: Windows Linux variants AIX HP-UX Solaris Impact: Execute Arbitrary Code/Commands Root Compromise Access: Remote/Unauthenticated Existing Account CVE Names: CVE-2007-5757 CVE-2007-3676 CVE-2008-0696 CVE-2008-0697 CVE-2008-0698 CVE-2008-0699 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=653 http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=654 Comment: This bulletin contains two (2) iDefense Vulnerability Advisories Only the Linux and Unix versions are vulnerable to the authenticated root compromise vulnerability. Revision History: February 13 2008: Added CVEs February 8 2008: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- IBM DB2 Universal Database Administration Server Memory Corruption Vulnerability I. BACKGROUND IBM Corp.'s DB2 Universal Database product is a large database server product commonly used for high end databases. The DB2 Administration Server (DAS) provides functionality that implements the Java-based DB2 Control Center GUI. For more information, visit IBM's DB2 product site at the following URL. http://ibm.com/db2/ II. DESCRIPTION Remote exploitation of a memory corruption vulnerability within version 9.1 of IBM Corp.'s DB2 Universal Database Administration Server (DAS) allows attackers to crash the service or potentially execute arbitrary code in the context of the affected service. When handling certain remote administration requests, the Administration Server uses a 32-bit pointer value supplied by the remote client. By supplying carefully chosen address values, an attacker can cause memory corruption or force the program to access invalid memory locations. III. ANALYSIS Exploitation allows attackers to crash the service or execute arbitrary code within the context of the affected service. No authentication credentials are required. The attacker only needs the ability to establish a TCP session with the DAS on TCP port 523. By default this service runs as "dasusr1" on Linux and "db2admin" on Windows. In the Linux version of the DAS, the process is monitored by a fault monitoring process and will restart automatically after a few seconds. This monitoring process does not exist in the Windows version. IV. DETECTION iDefense has confirmed the existence of this vulnerability in the DAS (db2dassrm) as included with DB2 9.1 with Fix Pack 2 for both Linux and Windows platforms. Previous versions, as well as builds for other platforms, are suspected to be vulnerable. V. WORKAROUND Employing firewalls to limit access to the affected service will mitigate exposure to this vulnerability. VI. VENDOR RESPONSE IBM Corp. has addressed these vulnerabilities by releasing V9 Fix Pack 4 and V8 FixPak 16 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-2007-3676 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 06/18/2007 Initial vendor notification 06/20/2007 Initial vendor response 08/14/2007 V8 Fix Pack 15 made available 08/15/2007 V9 Fix Pack 3 made available 10/10/2007 V9 Fix Pack 3a made available 11/13/2007 V9 Fix Pack 4 made available 01/28/2008 V8 Fix Pack 16 made available 02/05/2008 V8 Fix Pack 16 fix list made available 02/07/2008 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 2008 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 customer service 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 db2pd Arbitrary Library Loading Vulnerability 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 library loading vulnerability in IBM Corp.'s DB2 Universal Database could allow attackers to gain root privileges. When the DB2INSTANCE environment variable is set, the libdb2 library will use the corresponding user's directory in place of the DB2 instance directory. This allows an unprivileged local user to control the directory structure on which several set-uid root binaries operate. This vulnerability exists due to the way the db2pd binary loads a library. The program will construct the path to a library to be loaded by concatenating the path to the instance directory with the static string "/sqllib/lib/libdb2fmtdmp.so". When an attacker sets the DB2INSTANCE environment variable to their user name, the binary will load the library from their directory. III. ANALYSIS Exploitation allows local attackers to gain root privileges. In order to exploit this vulnerability, an attacker must be able to execute the set-uid root db2pd binary. IV. DETECTION iDefense has confirmed the existence of this vulnerability in IBM Corp.'s DB2 Universal Database 9.1 with FixPack 2 installed on a Linux system. Other versions, including those for other UNIX systems, are also suspected to be vulnerable. V. WORKAROUND In order to mitigate exposure to this vulnerability, implement one of the following workarounds. Using strict permissions for the DB2 instance directory will prevent non-inst ance users from accessing the set-uid root binaries. Remove the set-uid bit from the db2pd binary. VI. VENDOR RESPONSE IBM Corp. has addressed these vulnerabilities by releasing V9 Fix Pack 4 and version V8 FixPak 16 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-2007-5757 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 11/13/2007 V9 Fix Pack 4 made available 01/28/2008 V8 Fix Pack 16 made available 02/05/2008 V8 Fix list made available 02/07/2008 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 2008 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 customer service 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-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBR7JuxSh9+71yA2DNAQKU0QQAlf818tNfGyrHy8HHzd+DiqaXrb0JoQrj TjFkbuxWeALWVC7lQwF+EtKV7pP5HtLMGPwXLPB9Qb98RkNBDNTdgbCbvVVehaKS kdSXDG4qQVymaDRv2plVt4ii3/Q6NmT1+32w1WN4H7tSAOIZ/qN0U0GxBYW4LGI4 zJA4rxfdVwE= =wMru -----END PGP SIGNATURE-----