AUSCERT External Security Bulletin Redistribution

            ESB-2002.180 -- SGI Security Advisory 20020402-01-P
               IRIX XFS filesystem denial of service attack
                               16 April 2002


        AusCERT Security Bulletin Summary

Product:                XFS
Vendor:                 SGI
Operating System:       IRIX 6.5 systems prior to 6.5.12
Impact:                 Denial of Service
Access Required:        Existing Account

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



                          SGI Security Advisory

        Title:      IRIX XFS filesystem denial of service attack
        Number:     20020402-01-P
        Date:       April 15, 2002
        Reference:  CAN-2002-0042


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

It has been reported that there is a vulnerability in IRIX's XFS filesystem.
Under some circumstances, a user can create a file that would hang any
application that would try to access it.  This has the potential to be used
to create a Denial of Service attack.

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 6.5.12 and later versions.

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

The XFS filesystem is the default filesystem in IRIX 6.5, therefore all IRIX
6.5 systems are potentially vulnerable to this problem.

This vulnerability may be not exploited by a remote user, a local account is

This vulnerability can lead to a Denial of Service.

SGI assigned the following CVE to this vulnerability:

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

SGI has released patches to address this problem.  Our recommendation is
to upgrade to IRIX 6.5.12 or later.

   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 6.5.10m      yes            4286
   IRIX 6.5.10f      yes            4253
   IRIX 6.5.11m      yes                       Notes 2 & 3
   IRIX 6.5.11f      yes            4254
   IRIX 6.5.12       no
   IRIX 6.5.13       no
   IRIX 6.5.14       no
   IRIX 6.5.15       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 6.5.12 or later

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

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

Filename:                 README.patch.4286
Algorithm #1 (sum -r):    28330 8 README.patch.4286
Algorithm #2 (sum):       39948 8 README.patch.4286
MD5 checksum:             DD88F4A17F3BAFEA470C17CFB68F693A

Filename:                 patchSG0004286
Algorithm #1 (sum -r):    42009 2 patchSG0004286
Algorithm #2 (sum):       42193 2 patchSG0004286
MD5 checksum:             01F9634E6DCD8893C0D743B267C1D959

Filename:                 patchSG0004286.eoe_sw
Algorithm #1 (sum -r):    25043 13360 patchSG0004286.eoe_sw
Algorithm #2 (sum):       45889 13360 patchSG0004286.eoe_sw
MD5 checksum:             0770194058C390E5DA0EE1D402CB47AC

Filename:                 patchSG0004286.idb
Algorithm #1 (sum -r):    29719 7 patchSG0004286.idb
Algorithm #2 (sum):       17684 7 patchSG0004286.idb
MD5 checksum:             FE5CFE59138343ED743E4658D878FD42

Filename:                 README.patch.4253
Algorithm #1 (sum -r):    53492 29 README.patch.4253
Algorithm #2 (sum):       10868 29 README.patch.4253
MD5 checksum:             117515A96FDCC06DA6D360069BF14198

Filename:                 patchSG0004253
Algorithm #1 (sum -r):    54098 19 patchSG0004253
Algorithm #2 (sum):       7810 19 patchSG0004253
MD5 checksum:             FDE0FBDAF74600BB5D6C98B4B36A518B

Filename:                 patchSG0004253.cluster_admin_sw
Algorithm #1 (sum -r):    53890 1264 patchSG0004253.cluster_admin_sw
Algorithm #2 (sum):       41015 1264 patchSG0004253.cluster_admin_sw
MD5 checksum:             ADB036F14DD3BB0CABFF56DFA49D64A5

Filename:                 patchSG0004253.cluster_control_sw
Algorithm #1 (sum -r):    57927 2911 patchSG0004253.cluster_control_sw
Algorithm #2 (sum):       46116 2911 patchSG0004253.cluster_control_sw
MD5 checksum:             195444B1050AB985125A280B790E6D6C

Filename:                 patchSG0004253.cluster_services_sw
Algorithm #1 (sum -r):    14277 1808 patchSG0004253.cluster_services_sw
Algorithm #2 (sum):       60017 1808 patchSG0004253.cluster_services_sw
MD5 checksum:             365929CFBBF50B179FC7B5CBF8BBCDED

Filename:                 patchSG0004253.cxfs_sw
Algorithm #1 (sum -r):    40423 7581 patchSG0004253.cxfs_sw
Algorithm #2 (sum):       62074 7581 patchSG0004253.cxfs_sw
MD5 checksum:             1DF5877BB29275C77B6BF5C9C1469F2F

Filename:                 patchSG0004253.eoe_sw
Algorithm #1 (sum -r):    03986 4440 patchSG0004253.eoe_sw
Algorithm #2 (sum):       7047 4440 patchSG0004253.eoe_sw
MD5 checksum:             31C4B8300741D3C904B50661C9B0402A

Filename:                 patchSG0004253.idb
Algorithm #1 (sum -r):    44464 18 patchSG0004253.idb
Algorithm #2 (sum):       39382 18 patchSG0004253.idb
MD5 checksum:             38BF992242C629E2DEE08F9E3A126F8B

Filename:                 patchSG0004253.sysadm_base_sw
Algorithm #1 (sum -r):    20162 1680 patchSG0004253.sysadm_base_sw
Algorithm #2 (sum):       4626 1680 patchSG0004253.sysadm_base_sw
MD5 checksum:             0B184577E1954633CCBBE59D901060FE

Filename:                 patchSG0004253.sysadm_cxfs_sw
Algorithm #1 (sum -r):    26183 1569 patchSG0004253.sysadm_cxfs_sw
Algorithm #2 (sum):       43899 1569 patchSG0004253.sysadm_cxfs_sw
MD5 checksum:             CB64A03F7815E5EE06816B75DD58DA2E

Filename:                 README.patch.4254
Algorithm #1 (sum -r):    08556 23 README.patch.4254
Algorithm #2 (sum):       54378 23 README.patch.4254
MD5 checksum:             E7DDAC48F0D0463A609176CF781331EB

Filename:                 patchSG0004254
Algorithm #1 (sum -r):    59698 18 patchSG0004254
Algorithm #2 (sum):       2027 18 patchSG0004254
MD5 checksum:             A01A811C11139A47BF4D05930CABDF4D

Filename:                 patchSG0004254.cluster_admin_sw
Algorithm #1 (sum -r):    60527 1582 patchSG0004254.cluster_admin_sw
Algorithm #2 (sum):       18153 1582 patchSG0004254.cluster_admin_sw
MD5 checksum:             75EEDC2B94FFBABBA765075DCADE45A8

Filename:                 patchSG0004254.cluster_control_sw
Algorithm #1 (sum -r):    04205 3498 patchSG0004254.cluster_control_sw
Algorithm #2 (sum):       57434 3498 patchSG0004254.cluster_control_sw
MD5 checksum:             775EAF2E955DACBB42AB641F02A46220

Filename:                 patchSG0004254.cluster_services_sw
Algorithm #1 (sum -r):    08341 2218 patchSG0004254.cluster_services_sw
Algorithm #2 (sum):       11236 2218 patchSG0004254.cluster_services_sw
MD5 checksum:             D83BEBEF84553EF40370D6F0D3086FBB

Filename:                 patchSG0004254.cxfs_sw
Algorithm #1 (sum -r):    16484 7548 patchSG0004254.cxfs_sw
Algorithm #2 (sum):       65351 7548 patchSG0004254.cxfs_sw
MD5 checksum:             B9C9FE0FFA3C1D5DD2923ED5F8DE8407

Filename:                 patchSG0004254.eoe_sw
Algorithm #1 (sum -r):    08488 4083 patchSG0004254.eoe_sw
Algorithm #2 (sum):       35652 4083 patchSG0004254.eoe_sw
MD5 checksum:             058FF0663BD376F7FA8EB52862A3CFDF

Filename:                 patchSG0004254.idb
Algorithm #1 (sum -r):    23445 23 patchSG0004254.idb
Algorithm #2 (sum):       20069 23 patchSG0004254.idb
MD5 checksum:             66CA44FB96445595D0F276C641DEED83

Filename:                 patchSG0004254.sysadm_base_sw
Algorithm #1 (sum -r):    52860 1703 patchSG0004254.sysadm_base_sw
Algorithm #2 (sum):       29501 1703 patchSG0004254.sysadm_base_sw
MD5 checksum:             FAE8ABB6798022398A0ACD24C45CF8A3

Filename:                 patchSG0004254.sysadm_cxfs_sw
Algorithm #1 (sum -r):    02510 1664 patchSG0004254.sysadm_cxfs_sw
Algorithm #2 (sum):       456 1664 patchSG0004254.sysadm_cxfs_sw
MD5 checksum:             615D790FDD1E1D9712542B208F443688

- - ------------------
- - --- 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.

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

SGI wishes to thank Marc Olzheim, Sven Berkvens and 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


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
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% mail wiretap-request@sgi.com
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In the example above, <YourEmailAddress> is the email address that you wish
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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
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