Users login

Create an account »

JOIN XATRIX

Users login

Home » Hacking News » SGI 20030407-01-P: LDAP improper authorization

SGI 20030407-01-P: LDAP improper authorization

by Nikola Strahija on April 30th, 2003 A vulnerability has been found in IRIX's LDAP name service which can allow an attacker to log in without using any password.


-----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
[email protected]

------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
[email protected]

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 [email protected]
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
[email protected]

For reporting *NEW* SGI security issues, email can be sent to
[email protected] 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-----


Newsletter signup

Signup to our monthly newsletter and stay in touch with IT news!

Free E-books

We've got ebooks! But they're not online. :( Please give us a few days to bring downloads back.

Contact

Have something to say or just wanna drop us a line? Please keep this in mind: to spam, we reply with spam.

Contact us »