AUSCERT External Security Bulletin Redistribution

                   ESB-2002.173 -- SGI Security Advisory
                Mail, mailx, timed and sort vulnerabilities
                               12 April 2002


        AusCERT Security Bulletin Summary

Product:                mailx
Vendor:                 SGI
Operating System:       IRIX prior to 6.5.16
Impact:                 Root Compromise
                        Denial of Service
Access Required:        Remote
                        Existing Account

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



                          SGI Security Advisory

        Title:      Mail, mailx, timed and sort vulnerabilities
        Number:     20020401-01-P
        Date:       April 10, 2002


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

It has been reported that certain standard utilities in IRIX had security

  o  "mailx" and "Mail" could be made to dump core

  o  "sort" was using predictably-named temporary files

  o  "timed" could die when sent null packets

  o  "gzip" had a buffer overflow vulnerability

These vulnerabilities could lead to a denial-of-service or root exploit.
In the case of Mail/mailx, a local account may not be required.

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 in future releases of IRIX.

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

These utilities are all installed by default on all IRIX 6.5 systems.

The timed vulnerability may be exploited by a remote user, and no local
account is required.

The mailx, Mail, sort and gzip vulnerabilities require a local account in
order to be exploited.

- - ----------------------------
- - --- Temporary Workaround ---
- - ----------------------------

There is no effective workaround available for these problems.
SGI recommends either upgrading to IRIX 6.5.16 when it is released,
or installing the appropriate patch from the listing below.

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

SGI has provided patches for these vulnerabilities. Our recommendation is
to upgrade to IRIX 6.5.16 when available, or 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          yes                       Notes 2 & 3
   IRIX 6.5.1        yes                       Notes 2 & 3
   IRIX 6.5.2        yes                       Notes 2 & 3
   IRIX 6.5.3        yes                       Notes 2 & 3
   IRIX 6.5.4        yes                       Notes 2 & 3
   IRIX 6.5.5        yes                       Notes 2 & 3
   IRIX 6.5.6        yes                       Notes 2 & 3
   IRIX 6.5.7        yes                       Notes 2 & 3
   IRIX 6.5.8        yes                       Notes 2 & 3
   IRIX 6.5.9        yes                       Notes 2 & 3
   IRIX 6.5.10       yes                       Notes 2 & 3
   IRIX 6.5.11m      yes                       Notes 2 & 3
   IRIX 6.5.11f      yes                       Notes 2 & 3
   IRIX 6.5.12m      yes          4534
   IRIX 6.5.12f      yes          4535
   IRIX 6.5.13m      yes          4534
   IRIX 6.5.13f      yes          4535
   IRIX 6.5.14m      yes          4534
   IRIX 6.5.14f      yes          4535
   IRIX 6.5.15m      yes          4534
   IRIX 6.5.15f      yes          4535
   IRIX 6.5.16       no


     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

     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/irix/swupdates/

     3) Upgrade to IRIX 6.5.16m or 6.5.16f. Security patches can be found on:
        ftp://patches.sgi.com/support/free/security/patches/ and

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

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

Filename:                 README.patch.4534
Algorithm #1 (sum -r):    13804 8 README.patch.4534
Algorithm #2 (sum):       43355 8 README.patch.4534
MD5 checksum:             83E7A7D05DDF3E173309056F3FBB7118

Filename:                 patchSG0004534
Algorithm #1 (sum -r):    05536 4 patchSG0004534
Algorithm #2 (sum):       64119 4 patchSG0004534
MD5 checksum:             68E26B998FDC80EE323C2F6A606713B6

Filename:                 patchSG0004534.eoe_man
Algorithm #1 (sum -r):    08170 18 patchSG0004534.eoe_man
Algorithm #2 (sum):       57899 18 patchSG0004534.eoe_man
MD5 checksum:             7CF0A1FD73120A7FD8994ACCF3FAD2F7

Filename:                 patchSG0004534.eoe_src
Algorithm #1 (sum -r):    08489 45 patchSG0004534.eoe_src
Algorithm #2 (sum):       5610 45 patchSG0004534.eoe_src
MD5 checksum:             F779DA0E1D6BE7DD85628F1353A51721

Filename:                 patchSG0004534.eoe_sw
Algorithm #1 (sum -r):    30309 593 patchSG0004534.eoe_sw
Algorithm #2 (sum):       3676 593 patchSG0004534.eoe_sw
MD5 checksum:             A381709E021AB90ACCC5699A23252073

Filename:                 patchSG0004534.idb
Algorithm #1 (sum -r):    03657 3 patchSG0004534.idb
Algorithm #2 (sum):       39027 3 patchSG0004534.idb
MD5 checksum:             B02861A4AAAA0A55FC948DABE336A5FE

Filename:                 README.patch.4535
Algorithm #1 (sum -r):    06473 8 README.patch.4535
Algorithm #2 (sum):       43295 8 README.patch.4535
MD5 checksum:             04E693105557879E040221FCCB5451B8

Filename:                 patchSG0004535
Algorithm #1 (sum -r):    18098 4 patchSG0004535
Algorithm #2 (sum):       4005 4 patchSG0004535
MD5 checksum:             537B4360CC89815E68A11A06494F6EE0

Filename:                 patchSG0004535.eoe_man
Algorithm #1 (sum -r):    08170 18 patchSG0004535.eoe_man
Algorithm #2 (sum):       57899 18 patchSG0004535.eoe_man
MD5 checksum:             7CF0A1FD73120A7FD8994ACCF3FAD2F7

Filename:                 patchSG0004535.eoe_src
Algorithm #1 (sum -r):    51272 45 patchSG0004535.eoe_src
Algorithm #2 (sum):       60860 45 patchSG0004535.eoe_src
MD5 checksum:             C1E9DA4D44A5403A8C6D1445E6CD6D88

Filename:                 patchSG0004535.eoe_sw
Algorithm #1 (sum -r):    07781 595 patchSG0004535.eoe_sw
Algorithm #2 (sum):       26585 595 patchSG0004535.eoe_sw
MD5 checksum:             6CC83AF18C45DECA0F4D4E73B69E39DA

Filename:                 patchSG0004535.idb
Algorithm #1 (sum -r):    07659 3 patchSG0004535.idb
Algorithm #2 (sum):       39136 3 patchSG0004535.idb
MD5 checksum:             BE50603142EFEC2EC1515E4D6BA10235

- - ------------------------
- - --- Acknowledgments ----
- - ------------------------

SGI wishes to thank CERT, GOBBLES, NASA, Walter Roberson and the users of
the Internet Community at large for their assistance in this matter.

- - ------------------
- - --- References ---
- - -------------------

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/irix/ 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/linux/ 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/irix/ 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
(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>

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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