Published:
21 April 1997
Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-97.046 -- Silicon Graphics Advisory: 19970401-01-PX
IRIX gmemusage program
22 April 1997
===========================================================================
Silicon Graphics has released the following advisory concerning a security
vulnerability the IRIX gmemusage program.
The following security bulletin is provided as a service to AUSCERT's
members. As AUSCERT did not write this document, AUSCERT has had
no control over its content. As such, the decision to use any or
all of this information is the responsibility of each user or
organisation, and should be done so in accordance with site policies
and procedures.
Contact information for Silicon Graphics is included in the Security
Bulletin below. If you have any questions or need further information,
please contact them directly.
If you believe that your system has been compromised, contact
AUSCERT or your representative in FIRST (Forum of Incident Response
and Security Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 4477
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AUSCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
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______________________________________________________________________________
Silicon Graphics Inc. Security Advisory
Title: IRIX gmemusage program
Number: 19970401-01-PX
Date: April 21, 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 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.
______________________________________________________________________________
- - -------------------
- - --- Description ---
- - -------------------
A security vulnerability has been found with the gmemusage program
distributed in the Developer Toolbox versions 6.0 (based on IRIX 5.3)
6.1 (based on IRIX 6.2) and as part of the eoe.sw.perf subsystem for
IRIX 6.1 through 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 vulnerable SGI systems running
IRIX versions 5.x and 6.x. This issue has been corrected in more recent
releases of IRIX and will be corrected in future releases of IRIX.
- - --------------
- - --- Impact ---
- - --------------
The gmemusage program is used to graphically display a system's memory
usage.
Developer Toolbox versions 6.0 (based on IRIX 5.3) and 6.1 (based on
IRIX 6.2) contain the gmemusage program and source code. With the
Developer Toolbox, the gmemusage program can be installed wherever
desired and on any IRIX version 5.x through 6.4.
With the release of IRIX 6.1, the gmemusage program is part of the
eoe.sw.perf subsystem and can be installed on IRIX 6.1, 6.2,
6.3 and 6.4. The eoe.sw.perf is not installed by default.
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.
- - --------------------------
- - --- Temporary Solution ---
- - --------------------------
Although patches are available for this issue, it is realized that
there may be situations where installing the patches immediately many
not be possible.
The steps below can be used to limit the vulnerability by removing
the setuid permission. Once this is done, only root will be able
to run this program.
1) Become the root user on the system.
% /bin/su -
Password:
#
2) Check to see where the program is located.
# find / -type f -name gmemusage -local -print
/usr/local/bin/gmemusage
3) Remove the setuid permissions (in the example here
gmemusage was found in the directory /usr/local/bin in
step 2. For IRIX 6.1-6.4, the eoe.sw.perf gmemusage
program is installed in /usr/sbin).
# /bin/chmod u-s /usr/local/bin/gmemusage
4) Return to previous level.
# exit
$
- - ----------------
- - --- Solution ---
- - ----------------
**** IRIX 5.x, 6.0, 6.0.1 and 6.1 ****
Unfortunately, there are no patches for these operating system versions.
To remove this vulnerability, either the steps above should be performed
or the system should be upgraded to a newer operating system version.
**** IRIX 6.2 ****
For the IRIX operating system version IRIX 6.2 an inst-able patch
has been generated and made available via anonymous FTP and your
service/support provider. The patch is number 1973 and will install
on IRIX 6.2 only.
The SGI anonymous FTP site is sgigate.sgi.com (204.94.209.1) or its
mirror, ftp.sgi.com. Patch 1973 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.1973
Algorithm #1 (sum -r): 27020 7 README.patch.1973
Algorithm #2 (sum): 18313 7 README.patch.1973
MD5 checksum: 70024AC7413E26CCA7688B66CB0DEFA0
Filename: patchSG0001973
Algorithm #1 (sum -r): 57340 1 patchSG0001973
Algorithm #2 (sum): 29215 1 patchSG0001973
MD5 checksum: 781F5B53C56D331B97C04C72E55E8686
Filename: patchSG0001973.eoe_sw
Algorithm #1 (sum -r): 39526 181 patchSG0001973.eoe_sw
Algorithm #2 (sum): 17423 181 patchSG0001973.eoe_sw
MD5 checksum: 96A5675E5CE330EEFECDDCE11718AFAF
Filename: patchSG0001973.idb
Algorithm #1 (sum -r): 44824 2 patchSG0001973.idb
Algorithm #2 (sum): 48660 2 patchSG0001973.idb
MD5 checksum: A190C04BFB90CFFB6985D3C6AC66F42E
**** IRIX 6.3 ****
For the IRIX operating system version IRIX 6.3 an inst-able patch
has been generated and made available via anonymous FTP and your
service/support provider. The patch is number 1974 and will install
on IRIX 6.3 only.
The SGI anonymous FTP site is sgigate.sgi.com (204.94.209.1) or its
mirror, ftp.sgi.com. Patch 1974 can be found in the following
directories on the FTP server:
~ftp/Security
or
~ftp/Patches/6.3
##### Checksums ####
The actual patch will be a tar file containing the following files:
Filename: README.patch.1974
Algorithm #1 (sum -r): 09813 8 README.patch.1974
Algorithm #2 (sum): 23714 8 README.patch.1974
MD5 checksum: 19DCFF52A7B71B27139B1335990298BF
Filename: patchSG0001974
Algorithm #1 (sum -r): 27877 1 patchSG0001974
Algorithm #2 (sum): 28160 1 patchSG0001974
MD5 checksum: A516888F72CA44CE53CF450EAA08DC42
Filename: patchSG0001974.eoe_sw
Algorithm #1 (sum -r): 33109 174 patchSG0001974.eoe_sw
Algorithm #2 (sum): 61465 174 patchSG0001974.eoe_sw
MD5 checksum: 71A6021D4DD481E2CEA255BC300CB43F
Filename: patchSG0001974.idb
Algorithm #1 (sum -r): 21162 2 patchSG0001974.idb
Algorithm #2 (sum): 48367 2 patchSG0001974.idb
MD5 checksum: A882C99D6E89E6F329DD88673D14E78B
**** IRIX 6.4 ****
For the IRIX operating system version IRIX 6.4 an inst-able patch
has been generated and made available via anonymous FTP and your
service/support provider. The patch is number 1975 and will install
on IRIX 6.4 only.
The SGI anonymous FTP site is sgigate.sgi.com (204.94.209.1) or its
mirror, ftp.sgi.com. Patch 1975 can be found in the following
directories on the FTP server:
~ftp/Security
or
~ftp/Patches/6.4
##### Checksums ####
The actual patch will be a tar file containing the following files:
Filename: README.patch.1975
Algorithm #1 (sum -r): 49348 8 README.patch.1975
Algorithm #2 (sum): 26377 8 README.patch.1975
MD5 checksum: F6AFB26D388DC5B7D8C2BD21ADC4C5C5
Filename: patchSG0001975
Algorithm #1 (sum -r): 33550 1 patchSG0001975
Algorithm #2 (sum): 29274 1 patchSG0001975
MD5 checksum: D3BDA738FA0202A344FA536E0775AC46
Filename: patchSG0001975.eoe_sw
Algorithm #1 (sum -r): 27139 197 patchSG0001975.eoe_sw
Algorithm #2 (sum): 47748 197 patchSG0001975.eoe_sw
MD5 checksum: AA8B235BCB52188641160A7A3FE15438
Filename: patchSG0001975.idb
Algorithm #1 (sum -r): 63814 2 patchSG0001975.idb
Algorithm #2 (sum): 48418 2 patchSG0001975.idb
MD5 checksum: 76400549B8FEF0A07FA8117AC7836047
- - ------------------------
- - --- Acknowledgments ---
- - ------------------------
Silicon Graphics wishes to thank Serge Pachkovsky for his assistance
in this matter.
- - -----------------------------------------
- - --- SGI Security Information/Contacts ---
- - -----------------------------------------
If there are questions about this document, email can be sent to
cse-security-alert@csd.sgi.com.
------oOo------
Silicon Graphics 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 information and patches
is sgigate.sgi.com (204.94.209.1). Security information and patches
are located under the directories ~ftp/security and ~ftp/patches,
respectively. The Silicon Graphics Security Headquarters Web page is
accessible at the URL http://www.sgi.com/Support/Secur/security.html.
For issues with the patches on the FTP sites, email can be sent to
cse-security-alert@csd.sgi.com.
For assistance obtaining or working with security patches, please
contact your SGI support provider.
------oOo------
Silicon Graphics 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/Secur/wiretap.html) or by sending email
to SGI as outlined below.
% mail wiretap-request@sgi.com
subscribe wiretap <YourEmailAddress>
end
^d
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.
------oOo------
Silicon Graphics provides a comprehensive customer World Wide Web site.
This site is located at http://www.sgi.com/Support/Secur/security.html.
------oOo------
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, Silicon
Graphics is appropriately credited and the document retains and
includes its valid PGP signature.
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