__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SGI nsd LDAP Implementation Vulnerability [SGI Security Advisory 20030407-01-P] April 28, 2003 19:00 GMT Number N-084 ______________________________________________________________________________ PROBLEM: A vulnerability exists in the IRIX's LDAP name service implementation. It does not detect whether an LDAP server provides the USERPASSWORD attribute for each entry in the password database. PLATFORM: Irix 6.5 DAMAGE: This vulnerability could allow a user to log in without any password. SOLUTION: Upgrade or apply appropriate patch. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. The nsd daemon and the libns_ldap.so ASSESSMENT: library are installed by default on IRIX 6.5 systems. This vulnerability may allow a user to log into an LDAP server without a password. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/N-084.shtml ORIGINAL BULLETIN: ftp://patches.sgi.com/support/free/security/ advisories/20030407-01-P ______________________________________________________________________________ [***** Start SGI Security Advisory 20030407-01-P *****] -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SGI Security Advisory Title : Vulnerability in nsd LDAP Implementation Number : 20030407-01-P Date : April 25, 2003 Reference: CVE CAN-2003-0174 Reference: SGI BUGS 834042 874955 Fixed in : IRIX 6.5.20 (when available) or patch 5063 ______________________________________________________________________________ - ----------------------- - --- Issue Specifics --- - ----------------------- It has been reported that IRIX's LDAP name service implementation does not detect whether an LDAP server provides the USERPASSWORD attribute for each entry in the password database. This could allow a user to log in without any password. SGI has investigated the issues and recommends the following steps for neutralizing the exposure. It is HIGHLY RECOMMENDED that these measures be implemented on ALL vulnerable SGI systems. These issues have been corrected with a patch and in future releases of IRIX. - -------------- - --- Impact --- - -------------- The nsd daemon and the libns_ldap.so library are installed by default on IRIX 6.5 systems as part of eoe.sw.base. To determine the version of IRIX you are running, execute the following command: # /bin/uname -R That will return a result similar to the following: # 6.5 6.5.16f The first number ("6.5") is the release name, the second ("6.5.16f" in this case) is the extended release name. The extended release name is the "version" we refer to throughout this document. - ---------------------------- - --- Temporary Workaround --- - ---------------------------- If you need to use LDAP, there is no effective workaround available for these problems. SGI recommends either upgrading to IRIX 6.5.20 (when available), or installing the appropriate patch from the listing below. - ---------------- - --- Solution --- - ---------------- SGI has provided a series of patches for these vulnerabilities. Our recommendation is to upgrade to IRIX 6.5.20 (when available), or install the appropriate patch. Security patches are available on both http://support.sgi.com/ and ftp://patches.sgi.com/support/free/security/patches/ OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x unknown Note 1 IRIX 4.x unknown Note 1 IRIX 5.x unknown Note 1 IRIX 6.0.x unknown Note 1 IRIX 6.1 unknown Note 1 IRIX 6.2 unknown Note 1 IRIX 6.3 unknown Note 1 IRIX 6.4 unknown Note 1 IRIX 6.5 yes Notes 2, 3 & 5 IRIX 6.5.1 yes Notes 2, 3 & 5 IRIX 6.5.2 yes Notes 2, 3 & 5 IRIX 6.5.3 yes Notes 2, 3 & 5 IRIX 6.5.4 yes Notes 2, 3 & 5 IRIX 6.5.5 yes Notes 2, 3 & 5 IRIX 6.5.6 yes Notes 2, 3 & 5 IRIX 6.5.7 yes Notes 2, 3 & 5 IRIX 6.5.8 yes Notes 2, 3 & 5 IRIX 6.5.9 yes Notes 2, 3 & 5 IRIX 6.5.10 yes Notes 2, 3 & 5 IRIX 6.5.11 yes Notes 2, 3 & 5 IRIX 6.5.12 yes Notes 2, 3 & 5 IRIX 6.5.13 yes Notes 2, 3 & 5 IRIX 6.5.14 yes Notes 2, 3 & 5 IRIX 6.5.15 yes 5063 Notes 2, 4 & 5 IRIX 6.5.16 yes 5063 Notes 2, 4 & 5 IRIX 6.5.17 yes 5063 Notes 2, 4 & 5 IRIX 6.5.18 yes 5063 Notes 2, 4 & 5 IRIX 6.5.19 yes 5063 Notes 2, 4 & 5 IRIX 6.5.20 no Note 5 NOTES 1) This version of the IRIX operating has been retired. Upgrade to an actively supported IRIX operating system. See http://support.sgi.com/ for more information. 2) If you have not received an IRIX 6.5.X CD for IRIX 6.5, contact your SGI Support Provider or URL: http://support.sgi.com/ 3) Upgrade to IRIX 6.5.20 (when available) 4) Install the patch or upgrade to IRIX 6.5.20 (when available) 5) After the upgrade to IRIX 6.5.20 or the appropriate patch has been applied, the system administrator may choose to reject all password database entries that do not have a USERPASSWORD attribute. This may be achieved by adding the following line to the file /var/ns/ldap.conf, in the sections that define the passwd.byname and passwd.byuid tables: require USERPASSWORD When this has been done, entries that do not have any data for the USERPASSWORD attribute will not appear in the password database. ##### Patch File Checksums #### The actual patch will be a tar file containing the following files: Filename: README.patch.5063 Algorithm #1 (sum -r): 38335 9 README.patch.5063 Algorithm #2 (sum): 55349 9 README.patch.5063 MD5 checksum: 312EADECF448AE4DD94B94CDD32EBE70 Filename: patchSG0005063 Algorithm #1 (sum -r): 61119 2 patchSG0005063 Algorithm #2 (sum): 4626 2 patchSG0005063 MD5 checksum: 567CFEA58B178B2C3518BFB6ECD4729F Filename: patchSG0005063.eoe_sw Algorithm #1 (sum -r): 42558 165 patchSG0005063.eoe_sw Algorithm #2 (sum): 30121 165 patchSG0005063.eoe_sw MD5 checksum: DC53C976918C5142FBF885B90C424372 Filename: patchSG0005063.idb Algorithm #1 (sum -r): 63185 2 patchSG0005063.idb Algorithm #2 (sum): 43796 2 patchSG0005063.idb MD5 checksum: D8A4420C2133C46C206EC23E1B48CE4D Filename: patchSG0005063.sw Algorithm #1 (sum -r): 42558 165 patchSG0005063.sw Algorithm #2 (sum): 30121 165 patchSG0005063.sw MD5 checksum: DC53C976918C5142FBF885B90C424372 - ------------- - --- Links --- - ------------- SGI Security Advisories can be found at: http://www.sgi.com/support/security/ and ftp://patches.sgi.com/support/free/security/advisories/ SGI Security Patches can be found at: http://www.sgi.com/support/security/ and ftp://patches.sgi.com/support/free/security/patches/ SGI patches for IRIX can be found at the following patch servers: http://support.sgi.com/ and ftp://patches.sgi.com/ SGI freeware updates for IRIX can be found at: http://freeware.sgi.com/ SGI fixes for SGI open sourced code can be found on: http://oss.sgi.com/projects/ SGI patches and RPMs for Linux can be found at: http://support.sgi.com/ or http://oss.sgi.com/ SGI patches for Windows NT or 2000 can be found at: http://support.sgi.com/ IRIX 5.2-6.4 Recommended/Required Patch Sets can be found at: http://support.sgi.com/ and ftp://patches.sgi.com/support/patchset/ IRIX 6.5 Maintenance Release Streams can be found at: http://support.sgi.com/ IRIX 6.5 Software Update CDs can be obtained from: http://support.sgi.com/ The primary SGI anonymous FTP site for security advisories and patches is patches.sgi.com. Security advisories and patches are located under the URL ftp://patches.sgi.com/support/free/security/ For security and patch management reasons, ftp.sgi.com (mirrors patches.sgi.com security FTP repository) lags behind and does not do a real-time update. - ----------------------------------------- - --- SGI Security Information/Contacts --- - ----------------------------------------- If there are questions about this document, email can be sent to security-info@sgi.com. ------oOo------ SGI provides security information and patches for use by the entire SGI community. This information is freely available to any person needing the information and is available via anonymous FTP and the Web. The primary SGI anonymous FTP site for security advisories and patches is patches.sgi.com. Security advisories and patches are located under the URL ftp://patches.sgi.com/support/free/security/ The SGI Security Headquarters Web page is accessible at the URL: http://www.sgi.com/support/security/ For issues with the patches on the FTP sites, email can be sent to security-info@sgi.com. For assistance obtaining or working with security patches, please contact your SGI support provider. ------oOo------ SGI provides a free security mailing list service called wiretap and encourages interested parties to self-subscribe to receive (via email) all SGI Security Advisories when they are released. Subscribing to the mailing list can be done via the Web (http://www.sgi.com/support/security/wiretap.html) or by sending email to SGI as outlined below. % mail wiretap-request@sgi.com subscribe wiretap end ^d In the example above, is the email address that you wish the mailing list information sent to. The word end must be on a separate line to indicate the end of the body of the message. The control-d (^d) is used to indicate to the mail program that you are finished composing the mail message. ------oOo------ SGI provides a comprehensive customer World Wide Web site. This site is located at http://www.sgi.com/support/security/ . ------oOo------ If there are general security questions on SGI systems, email can be sent to security-info@sgi.com. For reporting *NEW* SGI security issues, email can be sent to security-alert@sgi.com or contact your SGI support provider. A support contract is not required for submitting a security report. ______________________________________________________________________________ This information is provided freely to all interested parties and may be redistributed provided that it is not altered in any way, SGI is appropriately credited and the document retains and includes its valid PGP signature. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBPqmmT7Q4cFApAP75AQG7RwQAhSVSd+ijObjGvuHhKkT22rLfAOFYm+ss 11sFoop3gxN3WKe2EYRlY7Y/HCgHAaMhhEk+USTKWwY20QAbaUA1czewyFfFhv4k EmiJ8F8/3E6RFKGmhCVN3OU3RKwFy3yS9uV+30sgJ/rfSOFBLsC5v7acdrlMrnnD predUWnb8PU= =BRjA -----END PGP SIGNATURE----- [***** End SGI Security Advisory 20030407-01-P *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Silicon Graphics, Inc. for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) N-074: Microsoft Virtual Machine (VM) Vulnerability N-075: SGI xfsdump vulnerability N-076: SGI: Multiple Vulnerabilities in BSD LPR Subsystem N-077: Microsoft Buffer Overrun in Kernel Message Handling Vulnerability N-078: Snort Integer Overflow in Stream4 (TCP) Vulnerability N-079: Cisco Secure Access Control Server (ACS) for Windows Admin Buffer Overflow Vulnerability N-080: Red Hat Updated tcpdump Packages Fix Various Vulnerabilities N-081: Microsoft Cumulative Patch for Outlook Express N-082: Microsoft Cumulative Patch for Internet Explorer (IE) N-083: Cisco Catalyst Enable Password Bypass Vulnerability