01 August 2008
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0764 -- [Win][UNIX/Linux] SAP MaxDB dbmsrv Untrusted Execution Path Vulnerability 1 August 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: SAP MaxDB Publisher: iDEFENSE Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact: Increased Privileges Execute Arbitrary Code/Commands Access: Existing Account CVE Names: CVE-2008-1810 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=729 - --------------------------BEGIN INCLUDED TEXT-------------------- iDefense Security Advisory 07.30.08 http://labs.idefense.com/intelligence/vulnerabilities/ Jul 30, 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 "dbmsrv" program is set-uid "sdb", set-gid "sdba", and installed by default. For more information, visit the product's website at the following URL. https://www.sdn.sap.com/irj/sdn/maxdb II. DESCRIPTION Local exploitation of an untrusted path vulnerability in the "dbmsrv" program, as distributed with SAP AG's MaxDB, allow attackers to elevate privileges to that of the "sdb" user. When a local user runs the "dbmcli" program, the MaxDB executes a "dbmsrv" process on the user's behalf. The "dbmsrv" process, which is responsible for executing user commands, runs as the user "sdb" with group "sdba". This vulnerability exists due to improper sanitization of the "PATH" environment variable. By prefixing the "PATH" environment variable with a path under the attacker control, one is able to execute arbitrary code with "sdb:sdba" privileges. III. ANALYSIS Exploitation allows an attacker to execute arbitrary code with privileges of the database owner, usually "sdb". To exploit this vulnerability, an attacker must have the ability to create executables on the system. IV. DETECTION iDefense has confirmed the existence of this vulnerability in SAP MaxDB version 7.6.03.15 on Linux. Other versions may also be vulnerable. V. WORKAROUND iDefense is currently unaware of any workaround for this issue. VI. VENDOR RESPONSE SAP AG has addressed this vulnerability by releasing a new version of MaxDB. For more information, consult SAP note 1178438. VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-1810 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 03/27/2008 Initial vendor notification 04/01/2008 Initial vendor response 07/30/2008 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 firstname.lastname@example.org for permission. 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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: firstname.lastname@example.org 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 iQCVAwUBSJKm9Sh9+71yA2DNAQL06QP+O4oUqMfluqvqPL4YrTg9CNbFdFI5hAvB ABgs8xai+KtA/tPMX05g31DAcbdWsxIYK6Z7nWmXMgPOzOV+CGQNZ8IEXjwRMqTm 5ndIIWWG/RdheJFjeLynjvmFR6P+U2C8lyMekKaPUHMGk8OyAChDHegkLLgXL4zW 7GtoT43ENfA= =liXS -----END PGP SIGNATURE-----