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______________________________________________________________________________

                          SGI Security Advisory



        Title:   locale vulnerability

        Title:   CAN-2000-0844

        Number:  20000901-01-P

        Date:    December 27, 2000

______________________________________________________________________________



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 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 ---

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



The locale subsystem is used to provide internationalization support.



A format string vulnerability  was reported by Ivan Arce of CORE SDI S.A.

on BUGTRAQ http://www.securityfocus.com/bid/1634



SGI has investigated the issue and recommends the following steps for

neutralizing the exposure.  It is HIGHLY RECOMMENDED that these measures

be implemented on ALL vulnerable SGI systems.  This issue has been

corrected in IRIX 6.5.10.





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

- --- Impact ---

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



The locale subsystem is installed by default on IRIX.



A local user account on the vulnerable system is required in order to

exploit the locale subsystem.



The exploitable format string buffer overflow vulnerability can lead to

a root compromise.



This locale vulnerability was reported by Ivan Arce of CORE SDI S.A.

on BUGTRAQ http://www.securityfocus.com/bid/1634



It was assigned CAN-2000-0844 by the CVE:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2000-0844



This locale vulnerability has been publicly discussed in Usenet newsgroups

and mailing lists.





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

- --- Temporary Solution ---

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



Unfortunately, there are no immediate or temporary workarounds for

this issue.  This issue can only be addressed with the installation

of IRIX 6.5.10 overlay on top of IRIX 6.5.





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

- --- Solution ---

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



   OS Version     Vulnerable?     Patch #      Other Actions

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



   IRIX 3.x         unknown                    Note 1 (retired)

   IRIX 4.x         unknown                    Note 1 (retired)

   IRIX 5.x         unknown                    Note 1 (retired)

   IRIX 6.0.x       unknown                    Note 1 (retired)

   IRIX 6.1         unknown                    Note 1 (retired)

   IRIX 6.2         unknown                    Note 1 (retired)

   IRIX 6.3         unknown                    Note 1 (retired)

   IRIX 6.4         unknown                    Note 1 (retired)



   IRIX 6.5          yes                       Note 2

   IRIX 6.5.1        yes                       Note 2

   IRIX 6.5.2        yes                       Note 2

   IRIX 6.5.3        yes                       Note 2

   IRIX 6.5.4        yes                       Note 2

   IRIX 6.5.5        yes                       Note 2

   IRIX 6.5.6        yes                       Note 2

   IRIX 6.5.7        yes                       Note 2

   IRIX 6.5.8        yes                       Note 2

   IRIX 6.5.9        yes                       Note 2

   IRIX 6.5.10       no                        Note 3





   NOTES



     1) This version of the IRIX operating has been retired.

        Upgrade to an actively supported IRIX operating system.

        See http://support.sgi.com/irix/news/index.html#policy

        for more information.



     2) This version of the IRIX operating system is in maintenance mode.

        Upgrade to an actively supported IRIX operating system.

        See http://support.sgi.com/irix/news/index.html#policy

        for more information.



     3) If you have not received an IRIX 6.5.10 Overlay CD for IRIX 6.5,

        contact your SGI Support Provider or download the IRIX 6.5.10

        Maintenance Release Stream from the following URL:

        http://support.sgi.com/colls/patches/tools/relstream/index.html





IRIX 6.5.X Releases Streams are released every quarter.



IRIX 6.5 Maintenance Release Streams can be found at:

http://support.sgi.com/colls/patches/tools/relstream/index.html



SGI Security Advisories can be found at:

http://www.sgi.com/support/security/ and

http://patches.sgi.com/support/free/security/advisories/



SGI Security Patches can be found at:

http://www.sgi.com/support/security/ and

http://patches.sgi.com/support/free/security/patches/



SGI patches for IRIX can be found at the following patch servers:

http://support.sgi.com/irix/ and http://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/linux/ and click on patches link and

http://oss.sgi.com/projects/sgilinux-combined/download/security-fixes/



SGI patches for Windows NT or 2000 can be found at:

http://support.sgi.com/nt/



IRIX 5.2-6.4 Recommended/Required Patch Sets can be found at:

http://support.sgi.com/irix/ and http://patches.sgi.com/support/patchset/



The primary SGI anonymous FTP site for security advisories and patches

is patches.sgi.com (216.32.174.211).  Security advisories and patches

are located under the URL http://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.



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

- --- Acknowledgments ----

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



SGI wishes to thank the users of the Internet Community at large for

their assistance in this matter.





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

- --- SGI Security Information/Contacts ---

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



If there are questions about this document, email can be sent to

cse-security-alert@sgi.com.



                      ------oOo------



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

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For assistance obtaining or working with security patches, please

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                      ------oOo------



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                      ------oOo------



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______________________________________________________________________________

      This information is provided freely to all interested parties

      and may be redistributed provided that it is not altered in any

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