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UNIRAS Brief - 431/05 - SGI - rpc.mountd security issues in IRIX 6.5.25-6.5.27


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   UNIRAS (UK Govt CERT) Briefing Notice - 431/05 dated 08.06.05  Time: 16:07  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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SGI - rpc.mountd security issues in IRIX 6.5.25-6.5.27




                         SGI Security Advisory

Title:      rpc.mountd security issues in IRIX 6.5.25-6.5.27
Number:     20050601-01-P
Date:       June 7, 2005
Reference:  SGI BUG 934110, CAN-2005-0139
Reference:  SGI BUG 933849, CAN-2005-0138
Fixed in:   Patch 5898 & 5899 for IRIX 6.5.25-6.5.27

SGI provides this information freely to the SGI user community for its
consideration, interpretation, implementation and use.   SGI recommends
that this information be acted upon as soon as possible.  SGI reserves
the right to change or update this Security Advisory without notice.

SGI provides the information in this Security Advisory on an "AS-IS"
basis only, and disclaims all warranties with respect thereto, express,
implied or otherwise, including, without limitation, any warranty of
merchantability or fitness for a particular purpose.  In no event shall
SGI be liable for any loss of profits, loss of business, loss of data or
for any indirect, special, exemplary, incidental or consequential damages
of any kind arising from your use of, failure to use or improper use of
any of the instructions or information in this Security Advisory.


- - -----------------------
- - --- Issue Specifics ---
- - -----------------------

It has been reported there are several security issues affecting
Network File Systems rpc.mountd running IRIX 6.5.25, 6.5.26 & 6.5.27.

The bugs addressed by these patches are:

* 934110 rpc.mountd allows excessive access rights for read-mostly exports

* 933849 rpc.mountd denies access to anonymous clients whose hostname is
         not listed in DNS, NIS or /etc/hosts

SGI has investigated the issue and recommends the following steps for
resolving this issue.  It is HIGHLY RECOMMENDED that these measures
be implemented on ALL vulnerable SGI systems.

- - --------------
- - --- Impact ---
- - --------------

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 6.5.27m

The first number ("6.5") is the release name, the second ("6.5.27m" in
this case) is the extended release name.  The extended release name is
the "version" we refer to throughout this document.

- - ----------------
- - --- Solution ---
- - ----------------

SGI has provided a series of patches for these vulnerabilities
and recommends that all affected operating systems install the
appropriate patch.

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 6.5-6.5.24  unknown                        Note 1
IRIX 6.5.25      yes              5898          Notes 2 & 3
IRIX 6.5.26      yes              5899          Notes 2 & 3
IRIX 6.5.27      yes              5899          Notes 2 & 3


    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) Install the required patch(es) based on your operating release.

               ##### Patch File Checksums ####

The actual patch will be a tar file containing the following files:

Filename:                 README.patch.5898
Algorithm #1 (sum -r):    33581 8 README.patch.5898
Algorithm #2 (sum):       34870 8 README.patch.5898
MD5 checksum:             2BFBE3FF1CEFBF720954A03E7E2D8A62

Filename:                 patchSG0005898
Algorithm #1 (sum -r):    37912 1 patchSG0005898
Algorithm #2 (sum):       29114 1 patchSG0005898
MD5 checksum:             1637909A5FCF1FB9E3C986F696F94694

Filename:                 patchSG0005898.idb
Algorithm #1 (sum -r):    07058 1 patchSG0005898.idb
Algorithm #2 (sum):       35083 1 patchSG0005898.idb
MD5 checksum:             DE6702A79942055BAA4245D4E640F46E

Filename:                 patchSG0005898.nfs_sw
Algorithm #1 (sum -r):    36202 59 patchSG0005898.nfs_sw
Algorithm #2 (sum):       31684 59 patchSG0005898.nfs_sw
MD5 checksum:             715A87A7C17D149B708BB86682177DC6

Filename:                 README.patch.5899
Algorithm #1 (sum -r):    04499 8 README.patch.5899
Algorithm #2 (sum):       44108 8 README.patch.5899
MD5 checksum:             881EA3C4C00303ADA8FB8B42FFEFB37E

Filename:                 patchSG0005899
Algorithm #1 (sum -r):    00563 1 patchSG0005899
Algorithm #2 (sum):       33072 1 patchSG0005899
MD5 checksum:             4FCA2A682EE0BA133291AD0B3CD3BD28

Filename:                 patchSG0005899.idb
Algorithm #1 (sum -r):    24895 1 patchSG0005899.idb
Algorithm #2 (sum):       35057 1 patchSG0005899.idb
MD5 checksum:             4985446CF9423A9ED34A2B18DFD6CD48

Filename:                 patchSG0005899.nfs_sw
Algorithm #1 (sum -r):    43478 63 patchSG0005899.nfs_sw
Algorithm #2 (sum):       49388 63 patchSG0005899.nfs_sw
MD5 checksum:             BC518B52AAE59520180691C75A971E19

- - -------------
- - --- Links ---
- - -------------

Patches are available via the web, anonymous FTP and from your SGI
service/support provider.

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

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 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


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:

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
or by sending email to SGI as outlined below.

% mail wiretap-request@xxxxxxx
subscribe wiretap <YourEmailAddress>

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 security-info@xxxxxxxx

For reporting *NEW* SGI security issues, email can be sent to
security-alert@xxxxxxx 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.

Version: 2.6.2


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UNIRAS wishes to acknowledge the contributions of SGI for the information 
contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
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