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Category:   Application (Generic)  >   Netstat Vendors:   SGI (Silicon Graphics)
'netstat' Utility for SGI IRIX UNIX Operating System May Let Local Users Detect the Presence of Files Regardless of File Permissions
SecurityTracker Alert ID:  1004231
SecurityTracker URL:  http://securitytracker.com/id/1004231
CVE Reference:   CVE-2002-0355   (Links to External Site)
Date:  May 7 2002
Impact:   Disclosure of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.5 - 6.5.11
Description:   A vulnerability was reported in the 'netstat' utility on SGI's IRIX operating system. A local user may be able to determine whether a file exists or not, regardless of the permissions on that file.

SGI reports that /usr/etc/netstat allows a local user to detect whether or not a file exists even when the permissions and ownership of that file should not allow it.

The /usr/etc/netstat binary is part of the IRIX base system and is reportedly installed by default on all SGI machines.

SGI credits TESO with reporting this flaw.

Impact:   A local user can determine if any file on the system exists or not, regardless of the user's privileges in relation to the file.
Solution:   SGI has fixed this vulnerability in IRIX 6.5.12 or a later version.


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 6.5.11, yes,, Notes 2 & 3
IRIX 6.5.12, no,,
IRIX 6.5.13, no,,
IRIX 6.5.14, no,,
IRIX 6.5.15, no,,
IRIX 6.5.16, no,,

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) 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 a later version of IRIX.

Vendor URL:  www.sgi.com/support/security/ (Links to External Site)
Cause:   Access control error
Underlying OS:  UNIX (SGI/IRIX)

Message History:   None.


 Source Message Contents

Subject:  IRIX netstat vulnerability


-----BEGIN PGP SIGNED MESSAGE-----

_____________________________________________________________________________

                          SGI Security Advisory

        Title:      netstat vulnerability
        Number:     20020503-01-I
        Date:       May 7, 2002
        Reference:  CAN-2002-0355
_____________________________________________________________________________

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

It's been reported that /usr/etc/netstat allows detection of whether or not
a file exists, even when the permissions and ownership of that file should
not allow it.

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.

These issues have been corrected in IRIX 6.5.12 and later versions.


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

The /usr/etc/netstat binary is part of the IRIX base system, and is
installed by default on all SGI machines.

The possible impact of this is that non-privileged users can detect if files
exist when they shouldn't be able to.

SGI is not aware of any specific exploits for this, but this ability could
conceivably be used for nefarious purposes.

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

This vulnerability has been fixed in IRIX 6.5.12 and later versions.

This vulnerability was assigned the following CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0355


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

There is no effective workaround for this vulnerability.

SGI recommends upgrading to IRIX 6.5.12 or a later version.


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

SGI has not provided patches for this vulnerability. Our recommendation is
to upgrade to IRIX 6.5.12 or a later version.


   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 6.5.11       yes                       Notes 2 & 3
   IRIX 6.5.12       no
   IRIX 6.5.13       no
   IRIX 6.5.14       no
   IRIX 6.5.15       no
   IRIX 6.5.16       no


   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) 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 a later version of IRIX.


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

SGI wishes to thank TESO Security, and the users of the Internet Community
at large for their assistance in this matter.


- -------------
- --- Links ---
- -------------

SGI Security Advisories can be found at:
http://www.sgi.com/support/security/ and
ftp://patches.sgi.com/support/free/security/advisories/

SGI Security Patches can be found at:
http://www.sgi.com/support/security/ and
ftp://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 ftp://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/ or
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 ftp://patches.sgi.com/support/patchset/

IRIX 6.5 Maintenance Release Streams can be found at:
http://support.sgi.com/colls/patches/tools/relstream/index.html

IRIX 6.5 Software Update CDs can be obtained from:
http://support.sgi.com/irix/swupdates/

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 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
security-info@sgi.com.

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

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 (216.32.174.211).  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:
http://www.sgi.com/support/security/

For issues with the patches on the FTP sites, email can be sent to
security-info@sgi.com.

For assistance obtaining or working with security patches, please
contact your SGI support provider.

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

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>
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------

SGI provides a comprehensive customer World Wide Web site. This site is
located at http://www.sgi.com/support/security/ .

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

If there are general security questions on SGI systems, email can be sent to
security-info@sgi.com.

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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