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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0688 -- [Win][Netware][Linux][Solaris][AIX] Novell eDirectory LDAP Search Request Heap Corruption Vulnerability 11 July 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Novell eDirectory 8.8.2 Support Pack 2 Novell eDirectory 8.7.3 Support Pack 9 Publisher: iDEFENSE Operating System: Netware Solaris Linux variants AIX Windows Impact: Execute Arbitrary Code/Commands Access: Remote/Unauthenticated CVE Names: CVE-2008-1809 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=724 - --------------------------BEGIN INCLUDED TEXT-------------------- iDefense Security Advisory 07.09.08 http://labs.idefense.com/intelligence/vulnerabilities/ Jul 09, 2008 I. BACKGROUND Novell eDirectory is cross-platform directory server that implements the Lightweight Directory Access Protocol (LDAP). The search request is used to search a directory tree for objects that match a search filter. For more information, see the vendor's site found at the following URL. http://www.novell.com/products/edirectory/ II. DESCRIPTION Remote exploitation of a heap buffer overflow vulnerability in Novell Inc.'s eDirectory could allow an attacker to execute arbitrary code with the privileges of the affected service. The vulnerability exists due to an incorrect calculation when allocating a heap buffer to store the search parameters. By passing NULL search parameters, it is possible to overflow a heap based buffer with the string "(null)". This can result in the corruption of heap management structures, and depending on the layout of the heap, possibly function pointers. III. ANALYSIS Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the affected service, usually root. Since the data that overflows the buffer is not controlled by the attacker, exploitation is non-trivial. IV. DETECTION iDefense has confirmed the existence of this vulnerability in eDirectory version 8.8 SP2 for Linux. Other versions may also be affected. V. WORKAROUND It is possible to disable the LDAP service from running via the ndsmodules.conf file which is usually located in /etc/opt/novell/eDirectory/conf. However, doing so greatly reduces the functionality of this software. VI. VENDOR RESPONSE Novell Inc. has addressed this vulnerability with the release of FTF2 for eDirectory 8.8 SP2 (8.8.2) and SP10b for eDirectory 8.7.3. For more information visit the following URL. http://www.novell.com/support/viewContent.do?externalId=3843876 VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-1809 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 03/10/2008 Initial vendor notification 03/13/2008 Initial vendor response 07/09/2008 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 iQCVAwUBSHarayh9+71yA2DNAQK0ywP9GwwvNoXQcHVkYrEK+W2cStv5BeljsGx9 Tdr5QyOcErcQSqRpL0e5aXiDLUTHsDzy8AwzIGmsaAUzLYW0VUVGw0sI1lXlbRs+ +yHV41bfm8o69c2QTv5ZIdkuMkOm7RTZO14HVKf/Pd1bREHuTmzx7FmU02IbndEM KvjbEkyYmbg= =koSD -----END PGP SIGNATURE-----