===================================================================== CERT-Renater Note d'Information No. 2006/VULN211 _____________________________________________________________________ DATE : 28/04/2006 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running Sun Java System Directory Server 5.2. ====================================================================== Sun(sm) Alert Notification This is a preliminary Sun Alert notification. Sun provides these notices in an effort to allow customers to implement mitigation strategies while these issues are being investigated. The information contained in these documents is likely to change as more is learned about the applicable issues. At the time of publication, workarounds and/or final resolutions are not available for the issues. Preliminary Sun Alert notifications will be updated as more information becomes available. * Sun Alert ID: 102294 * Synopsis: Sun Java System Directory Server: Denial of Service May Occur Due to Large Memory Allocation for Specific LDAP Requests * Category: Security * Product: Sun Java System Directory Server 5.2 * BugIDs: 6384310 * Avoidance: None * State: Preliminary * Date Released: 26-Apr-2006 * Date Closed: * Date Modified: 1. Impact A local or remote unprivileged user may be able to prevent an LDAP server from responding to LDAP client requests. This is a Denial of Service (DoS) as LDAP clients referencing the LDAP server may experience hangs or slow performance. Users may no longer be able to login on affected LDAP client systems. This issue is also described in CVE-2006-0647 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0647 2. Contributing Factors This issue can occur in the following releases for all platforms (Solaris 8, 9, and 10 on Solaris SPARC and Solaris x86 Platforms, Linux, Windows, HP-UX, and AIX): Native Package Versions: * Sun ONE Directory Server 5.2 * Sun Java System Directory Server 5 2003Q4 (5.2patch1) * Sun Java System Directory Server 5 2004Q2 (5.2patch2) * Sun Java System Directory Server 5 2005Q1 (5.2patch3) * Sun Java System Directory Server 5 2005Q4 (5.2patch4) PatchZIP (Compressed Archive) versions: * Sun One Directory Server 5.2 * Sun Java System Directory Server 5.2 Patch2 * Sun Java System Directory Server 5.2 Patch3 * Sun Java System Directory Server 5.2 Patch4 Note: Sun ONE Directory Server 5.1 and earlier versions are not affected by this issue. To determine the version of Directory Server running on a system, the following command can be used: $ cd /bin/slapd/server[/64] $ ./ns-slapd -V -D 3. Symptoms Should the described issue occur, the LDAP server will no longer respond to client LDAP requests. The LDAP server process, ns-slapd, may not be running on the LDAP server. If the LDAP server process is no longer running, there may a message similar to the following about failing to calloc a random number of bytes in the error log: ERROR<5135> - Resource Limit - conn=-1 op=-1 msgId=-1 - Memory allocation error calloc of 8248 bytes failed; errno 11 4. Relief/Workaround There is no Workaround for this issue. To recover from an unresponsive LDAP server instance, the following command can be used to restart the LDAP server process: On UNIX systems (usually as root user): # /start-slapd On Windows systems, open the "Services" panel and start the service manually. 5. Resolution A final resolution is pending completion. This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements. Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================