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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0248 -- [Win][UNIX/Linux] SAP MaxDB Signedness Error Heap Corruption Vulnerability 11 March 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: SAP MaxDB 7.6.0.37 and prior Publisher: iDEFENSE Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact: Execute Arbitrary Code/Commands Denial of Service Access: Remote/Unauthenticated CVE Names: CVE-2008-0307 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=669 Comment: This advisory references vulnerabilities in products which run on platforms other than Linux. It is recommended that administrators running SAP MaxDB check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- iDefense Security Advisory 03.10.08 http://labs.idefense.com/intelligence/vulnerabilities/ Mar 10, 2008 I. BACKGROUND SAP's MaxDB is a database software product. MaxDB was released as open source from version 7.5 up to version 7.6.00. Later versions are no longer open source but are available for download from the SAP SDN website (sdn.sap.com) as a community edition with free community support for public use beyond the scope of SAP applications. The "vserver" program is responsible for accepting and handling communication with remote database clients. For more information, visit the product's website at the following URL. https://www.sdn.sap.com/irj/sdn/maxdb II. DESCRIPTION Remote exploitation of a signedness error in the "vserver" component of SAP AG's MaxDB could allow attackers to execute arbitrary code. After accepting a connection, the "vserver" process forks and reads parameters from the client into various structures. When doing so, it trusts values sent from the client to be valid. By sending a specially crafted request, an attacker can cause heap corruption. This leads to a potentially exploitable memory corruption condition. III. ANALYSIS Exploitation allows an attacker to execute arbitrary code in the context of the running service. In order to exploit this vulnerability, an attacker must be able to establish a TCP session on port 7210 with the target host. Additionally, the attacker must know the name of an active database on the server. Since this service uses the fork() system call once a connection has been accepted, an attacker can repeatedly attempt to exploit this vulnerability. Some exploitation attempts may result in the database process ceasing to run, in which case further exploitation attempts will not be possible. IV. DETECTION iDefense has confirmed the existence of this vulnerability in SAP AG's MaxDB version 7.6.0.37 on Linux. Other versions may also be affected. V. WORKAROUND Employing firewalls to limit access to the affected service will mitigate exposure to this vulnerability. VI. VENDOR RESPONSE SAP AG has addressed this vulnerability by releasing a new version of MaxDB. For more information, consult SAP note 1140135. VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0307 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 12/06/2007 Initial vendor notification 12/10/2007 Initial vendor response 03/10/2008 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 © 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 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-------------------- 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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. 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 iQCVAwUBR9YfuSh9+71yA2DNAQKzkgQAm2tnbj4nmGFwS+1ahM3nrfEFT9qdR4Cd vDNOopoYaFGgiNkODXR9yA9qjDyhIwp2jp88qsWjph8jE1kLeNEokt3/89JMxvX6 rIraDD11h57DJ1d9hJKb8ET1GtMYPRbfWOInFnarC5osUuB89tN8oNqoDVhJbCF8 LdcQFMx5WFI= =RViC -----END PGP SIGNATURE-----