iDefense Security Advisory 07.15.08 http://labs.idefense.com/intelligence/vulnerabilities/ Jul 15, 2008
I. BACKGROUND Internet Directory is Oracle's implementation of the Lightweight Directory Access Protocol (LDAP) v3 service. It is used in conjunction with Oracle Identity Management to implement user administration in the Oracle environment. More information can be found at the following URL. http://www.oracle.com/technology/products/oid/index.html II. DESCRIPTION Remote exploitation of a pre-authentication input validation vulnerability in Oracle Corp.'s Oracle Internet Directory allows an attacker to conduct a denial of service attack on a vulnerable host. Internet Directory consists of two processes. One process acts as a listener. It handles incoming connections and passes them off to the second process. The second process, which handles requests, contains the vulnerability. When processing a malformed LDAP request, it is possible to cause the handler to dereference a NULL pointer. This results in the process crashing. Future connection requests will be accepted by the listener process, and then immediately closed when it finds that there is no handler process running. III. ANALYSIS Exploitation of this vulnerability allows an attacker to deny service to legitimate users of the directory server. In order to exploit this issue, an attacker must be able to establish an LDAP session with the vulnerable server. This is typically done via TCP port 389 or the SSL-enabled TCP port 636. No authentication is needed. In order to restore functionality, the listener process must be stopped and restarted. IV. DETECTION iDefense confirmed the existence of this vulnerability in Oracle Internet Directory for Windows version 10.1.4.0.1 with the April 2007 CPU installed. Previous versions may also be affected. V. WORKAROUND iDefense is currently unaware of any workarounds for this issue. VI. VENDOR RESPONSE Oracle Corp. has addressed this vulnerability with the release of their July 2008 Critical Patch Update. For more information, visit the following URL. http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpujul2008.html VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-2595 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 05/11/2007 Initial vendor notification 05/11/2007 Initial vendor response 07/15/2008 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by Joxean Koret. 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 [EMAIL PROTECTED] 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. _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
