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S-97-02.asc

S-97-02.asc
Posted Jan 10, 2000

Subject IRIX XFS Filesystem Security Date 13-Jan-97

systems | irix
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S-97-02.asc

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===============================================================================
>> CERT-NL, 01-Mar-2000 <<
>> All CERT-NL information has been moved to http://cert.surfnet.nl. Links <<
>> to CERT-NL information contained in this advisory are therefore outdated. <<
>> <<
>> CERT-NL also has stopped the CERT-CC-Mirror service. Due to this the <<
>> links to the CERT-CC mirror are obsolete. Visit the CERT-CC site for the <<
>> complete CERT-CC advisory texts: http://www.cert.org <<
===============================================================================
===============================================================================
Security Advisory CERT-NL
===============================================================================
Author/Source : Gert Meijerink Index : S-97-02
Distribution : World Page : 1
Classification: External Version: 1
Subject : IRIX: XFS Filesystem Security Date : 13-Jan-97
===============================================================================

By courtesy of Silicon Graphics Inc. we received information on a vulnerability
in IRIX 5.3, 6.1, 6.2, 6.3 and 6.4. concerning the XFS Filesystem Security.

CERT-NL recommends to check if this security issue is applicable, and if
that is the case apply the provided patch.

==============================================================================
______________________________________________________________________________
Silicon Graphics Inc. Security Advisory

Title: XFS Filesystem Security
Number: 19970102-01-PX
Date: January 9, 1997
______________________________________________________________________________

Silicon Graphics provides this information freely to the SGI user community
for its consideration, interpretation, implementation and use. Silicon
Graphics recommends that this information be acted upon as soon as possible.

Silicon Graphics will not be liable for any indirect, special, or
consequential damages arising from the use of, failure to use or improper
use of any of the instructions or information in this Security Advisory.
______________________________________________________________________________


Silicon Graphics Engineering and Worldwide Customer Service divisions
have become aware of a potential security issue within the XFS filesystem
available for IRIX 5.3, 6.1, 6.2, 6.3 and 6.4.

Silicon Graphics Inc. has investigated the issue and recommends the
following steps for neutralizing the exposure. It is HIGHLY RECOMMENDED
that these measures be implemented on ALL SGI systems running IRIX versions
5.3, 6.1, 6.2, 6.3 and 6.4. This issue will be corrected in future releases
of IRIX.




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


The XFS filesystem is an SGI specific architecture for organizing and
accessing files on a local physical system. The XFS filesystem is an
optional product for IRIX versions 5.3 and 6.1 but is the default
filesystem for IRIX 6.2, 6.3 and 6.4.

Silicon Graphics systems that are using XFS filesystems may be
vulnerable to a security issue where files may be truncated.

A local account is required in order to exploit this vulnerability both
locally and remotely.

It is believed that this vulnerability information is not public
knowledge and this has afforded SGI the opportunity to fully investigate
this issue and provide the following information and solutions.




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

Please, note that this security issue is only applicable *IFF* the
XFS filesystem software is installed *and* XFS filesystems are in
use on the system.

To determine if the XFS Filesystem software is installed on a
particular system, the following command can be used:


% /usr/sbin/versions -Inv | grep -i sw.xfs

I eoe2.sw.xfs 09/16/96 XFS Filesystem


In the above case, the XFS filesystem software is installed and
the next step is to determine if a XFS filesystem is being used
on the system.

If no output is returned by the versions command, the XFS filesystem
software is not installed and no further action is required.

To determine if a XFS filesystem is being used on the system, the
following command can be used:

% /etc/mount | grep -i xfs

/dev/root on / type xfs (rw,raw=/dev/rroot)

In the above case, there is an XFS filesystem in use on the system
and the following steps can be used to neutralize the exposure by
installing the recommended patches below.

If no output is returned by the mount command, there is not an
XFS filesystem in use on the system. Although at this time no
further action is required, in the future, if an XFS filesystem is
used on the system, the steps below should be used.

Unfortunately, there are no immediate or temporary workarounds for
this issue. The issue can only be addressed with a patch.



**** IRIX 3.x, 4.x, 5.0.x, 5.1.x, and 5.2 ****

The XFS file system was not available for these versions of IRIX
and therefore are not vulnerable. No further action is required.



**** IRIX 5.3 ****

For the IRIX operating system version 5.3, an inst-able patch has
been generated and made available via anonymous FTP and your
service/support provider. The patch is number 1409 and will
install on IRIX 5.3 only.

The SGI anonymous FTP site is sgigate.sgi.com (204.94.209.1) or its
mirror, ftp.sgi.com. Patch 1409 can be found in the following
directories on the FTP server:

~ftp/Security

or

~ftp/Patches/5.3

##### Checksums ####

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


Filename: README.patch.1409
Algorithm #1 (sum -r): 16070 30 README.patch.1409
Algorithm #2 (sum): 30025 30 README.patch.1409
MD5 checksum: 760B0360850D998344E92986E8CD67F7

Filename: patchSG0001409
Algorithm #1 (sum -r): 64133 2 patchSG0001409
Algorithm #2 (sum): 60012 2 patchSG0001409
MD5 checksum: 1D0B92D84EFB72D86CDD3755E129CCBA

Filename: patchSG0001409.eoe2_sw
Algorithm #1 (sum -r): 45878 3977 patchSG0001409.eoe2_sw
Algorithm #2 (sum): 36715 3977 patchSG0001409.eoe2_sw
MD5 checksum: 185D616DA7934E0A8887A3AC8FDC7896

Filename: patchSG0001409.idb
Algorithm #1 (sum -r): 45250 5 patchSG0001409.idb
Algorithm #2 (sum): 39612 5 patchSG0001409.idb
MD5 checksum: 48C3EC7CEFB97CEEC2D3D9AB2CA43A6C


**** IRIX 6.0.x ****

For the IRIX operating system versions 6.0.x, an upgrade to 6.1 or
better is required first. When the upgrade is completed, then the
security patches described in the following sections can be applied
depending on the final version of the upgrade.



**** IRIX 6.1 ****

For the IRIX operating system version 6.1, an inst-able patch has
been generated and made available via anonymous FTP and your
service/support provider. The patch is number 1674 and will
install only on IRIX 6.1.

The SGI anonymous FTP site is sgigate.sgi.com (204.94.209.1) or its
mirror, ftp.sgi.com. Patch 1674 can be found in the following
directories on the FTP server:

~ftp/Security

or

~ftp/Patches/6.1


##### Checksums ####

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

Filename: README.patch.1674
Algorithm #1 (sum -r): 08335 18 README.patch.1674
Algorithm #2 (sum): 57168 18 README.patch.1674
MD5 checksum: AA2736681CE2B5DD322ACE30C2B6D2AA

Filename: patchSG0001674
Algorithm #1 (sum -r): 23951 1 patchSG0001674
Algorithm #2 (sum): 28813 1 patchSG0001674
MD5 checksum: E42C04769BA63E0DF71B65B9B1AF629E

Filename: patchSG0001674.eoe2_sw
Algorithm #1 (sum -r): 50333 3532 patchSG0001674.eoe2_sw
Algorithm #2 (sum): 31735 3532 patchSG0001674.eoe2_sw
MD5 checksum: B20E27CC6ACD9E1953C66660E0B10A14

Filename: patchSG0001674.idb
Algorithm #1 (sum -r): 28159 5 patchSG0001674.idb
Algorithm #2 (sum): 37951 5 patchSG0001674.idb
MD5 checksum: 2B924FB8E10BB8E74F831797A074CC71

Filename: sa
Algorithm #1 (sum -r): 38223 63920 sa
Algorithm #2 (sum): 22689 63920 sa
MD5 checksum: B1C7F13D001EC31F69C65EFE7824F6AA



**** IRIX 6.2 ****

For the IRIX operating system version 6.2, an inst-able patch has
been generated and made available via anonymous FTP and your
service/support provider. The patch is number 1667 and will
install only on IRIX 6.2.

The SGI anonymous FTP site is sgigate.sgi.com (204.94.209.1) or its
mirror, ftp.sgi.com. Patch 1667 can be found in the following
directories on the FTP server:

~ftp/Security

or

~ftp/Patches/6.2


##### Checksums ####

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

Filename: README.patch.1667
Algorithm #1 (sum -r): 01427 35 README.patch.1667
Algorithm #2 (sum): 37097 35 README.patch.1667
MD5 checksum: DFDA305CA99FCC44D17823D77F980D96

Filename: patchSG0001667
Algorithm #1 (sum -r): 54840 7 patchSG0001667
Algorithm #2 (sum): 54999 7 patchSG0001667
MD5 checksum: 7480E20EACFA420EEE2554B0380C9BBE

Filename: patchSG0001667.dev_man
Algorithm #1 (sum -r): 25049 47 patchSG0001667.dev_man
Algorithm #2 (sum): 29146 47 patchSG0001667.dev_man
MD5 checksum: 8EE5EF7E41D11A1740FAC67ED703D655

Filename: patchSG0001667.eoe_man
Algorithm #1 (sum -r): 48662 108 patchSG0001667.eoe_man
Algorithm #2 (sum): 51295 108 patchSG0001667.eoe_man
MD5 checksum: CEF291C78FE59378901245C617DD012B

Filename: patchSG0001667.eoe_sw
Algorithm #1 (sum -r): 37464 11730 patchSG0001667.eoe_sw
Algorithm #2 (sum): 2498 11730 patchSG0001667.eoe_sw
MD5 checksum: 8521A642B3D0DC551DBD233913F5ED8B

Filename: patchSG0001667.idb
Algorithm #1 (sum -r): 10650 35 patchSG0001667.idb
Algorithm #2 (sum): 42657 35 patchSG0001667.idb
MD5 checksum: 77FA0133F21139255F9A8DCC7169E67E

Filename: sa
Algorithm #1 (sum -r): 10184 59688 sa
Algorithm #2 (sum): 36319 59688 sa
MD5 checksum: EE51AC91A017C7E2BBF04DCE768C01AF


**** IRIX "6.3 for O2" ****

IRIX operating system version "6.3 for O2" is a limited release version.
An update to "IRIX 6.3 for O2 including R10000" is required for this
security issue. This security issue has been addressed in the "IRIX
6.3 for O2 including R10000" distribution which will go to all registered
O2 customers.



**** IRIX 6.4 S2MP (Origin200, Origin2000, Onyx2) ****

IRIX operating system version 6.4 S2MP (Origin200, Origin2000, Onyx2)
is a limited release version. A future release of the IRIX 6.4
operating system will be released that will have corrections for
this issue. Customers with the limited release will receive
the future IRIX 6.4 release when it is available.

==============================================================================
CERT-NL is the Computer Emergency Response Team for SURFnet customers. SURFnet
is the Dutch network for educational, research and related institutes. CERT-NL
is a member of the Forum of Incident Response and Security Teams (FIRST).

All CERT-NL material is available under:
http://cert.surfnet.nl/

In case of computer or network security problems please contact your local
CERT/security-team or CERT-NL (if your institute is NOT a SURFnet customer
please address the appropriate (local) CERT/security-team).

CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer,
i.e. UTC+0100 in winter and UTC+0200 in summer (DST).

Email: cert-nl@surfnet.nl ATTENDED REGULARLY ALL DAYS
Phone: +31 302 305 305 BUSINESS HOURS ONLY
Fax: +31 302 305 329 BUSINESS HOURS ONLY
Snailmail: SURFnet bv
Attn. CERT-NL
P.O. Box 19035
NL - 3501 DA UTRECHT
The Netherlands

NOODGEVALLEN: 06 22 92 35 64 ALTIJD BEREIKBAAR
EMERGENCIES : +31 6 22 92 35 64 ATTENDED AT ALL TIMES
CERT-NL'S EMERGENCY PHONENUMBER IS ONLY TO BE USED IN CASE OF EMERGENCIES:
THE SURFNET HELPDESK OPERATING THE EMERGENCY NUMBER HAS A *FIXED*
PROCEDURE FOR DEALING WITH YOUR ALERT AND WILL IN REGULAR CASES RELAY IT
TO CERT-NL IN AN APPROPRIATE MANNER. CERT-NL WILL THEN CONTACT YOU.
===============================================================================

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