AUSCERT External Security Bulletin Redistribution

                  ESB-2003.0317 -- SGI Security Advisory
                 Vulnerability in nsd LDAP Implementation
                               28 April 2003


        AusCERT Security Bulletin Summary

Product:                LDAP name service
Vendor:                 SGI
Operating System:       IRIX 6.5.19 and prior
Impact:                 Increased Privileges
                        Reduced Security
Access Required:        Remote
CVE Names:              CAN-2003-0174

- --------------------------BEGIN INCLUDED TEXT--------------------


                          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

- - --------------
- - --- 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

  # /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

   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


     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

SGI Security Patches can be found at:
http://www.sgi.com/support/security/ and

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:

SGI fixes for SGI open sourced code can be found on:

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:

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:

IRIX 6.5 Software Update CDs can be obtained from:

The primary SGI anonymous FTP site for security advisories and patches is
patches.sgi.com.  Security advisories and patches are located under the URL

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


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

The SGI Security Headquarters Web page is accessible at the URL:

For issues with the patches on the FTP sites, email can be sent to

For assistance obtaining or working with security patches, please
contact your SGI support provider.


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 <YourEmailAddress such as aaanalyst@sgi.com >

In the example above, <YourEmailAddress> 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.


SGI provides a comprehensive customer World Wide Web site. This site is
located at http://www.sgi.com/support/security/ .


If there are general security questions on SGI systems, email can be sent to

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.

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