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Category:   OS (UNIX)  >   Checkpoint and Restart (CPR) Vendors:   SGI (Silicon Graphics)
SGI IRIX '/usr/sbin/cpr' State Saving Facility Has Buffer Overflow That May Let Local Users Get Root Access
SecurityTracker Alert ID:  1004193
SecurityTracker URL:  http://securitytracker.com/id/1004193
CVE Reference:   CVE-2002-0173   (Links to External Site)
Date:  Apr 30 2002
Impact:   Execution of arbitrary code via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in SGI's IRIX operating system in the Checkpoint and Restart (CPR) facility. A local user can obtain root privileges.

SGI reports that there is a flaw in the CPR facility (/usr/sbin/cpr), a feature designed to save a running process restart the saved process at a later time from the point already reached, without restarting the job. A local user can apparently trigger a buffer overflow to execute arbitrary code with root level privileges.

The cpr binary is reportedly installed by default on IRIX 6.5 systems as part of eoe.sw.cpr (the SGI Checkpoint-Restart Software).

To see if cpr is installed, execute the following command and compare to the results listed in the Source Message:

$ versions eoe.sw.cpr

No further details were provided.

SGI credits TESO with reporting this flaw.

Impact:   A local user may be able to execute arbitrary code on the system with root privileges to gain root access on the system.
Solution:   The vendor has fixed the flaw in IRIX 6.5.11 and later versions. SGI has not provided patches for this vulnerability and, instead, recommends upgrading to IRIX 6.5.11 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 6.5.10, yes,, Notes 2 & 3
IRIX 6.5.11, no,,
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 6.5.11 or a later version of IRIX.

If you don't use the Checkpoint Restart software, it can be uninstalled using the command:

# versions remove eoe.sw.cpr

Vendor URL:  www.sgi.com/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (SGI/IRIX)
Underlying OS Comments:  6.5 - 6.5.10

Message History:   None.


 Source Message Contents

Subject:  IRIX cpr vulnerability


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

_____________________________________________________________________________

                          SGI Security Advisory

        Title:      IRIX cpr vulnerability
        Number:     20020409-01-I
        Date:       April 30, 2002
        Reference:  CAN-2002-0173
______________________________________________________________________________

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

It's been reported that there is a potential buffer overflow vulnerability
in the /usr/sbin/cpr program. If successfully exploited, this can lead to a
root compromise.

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 IRIX 6.5.11 and later versions.


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

The cpr binary is installed by default on IRIX 6.5 systems as part of
eoe.sw.cpr (the SGI Checkpoint-Restart Software).

To see if cpr is installed, execute the following command:

  $ versions eoe.sw.cpr
  I = Installed, R = Removed

     Name                 Date        Description

     I  eoe                  09/19/2000  IRIX Execution Environment, 6.5.10f
     I  eoe.sw               09/19/2000  IRIX Execution Environment Software
     I  eoe.sw.cpr           09/19/2000  SGI Checkpoint-Restart Software

If the command returns output similar to the above, then cpr is installed.

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

This vulnerability has been fixed in IRIX 6.5.11.

This vulnerability was assigned the following CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0173


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

If you don't use the Checkpoint Restart software, it can be uninstalled
using the command:

  # versions remove eoe.sw.cpr

If you use the software, then SGI recommends upgrading to IRIX 6.5.11
or later.


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

SGI has not provided patches for this vulnerability. Our recommendation is
to upgrade to IRIX 6.5.11 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 6.5.10       yes                       Notes 2 & 3
   IRIX 6.5.11       no
   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 6.5.11 or a later version of IRIX.


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

SGI wishes to thank TESO Security, FIRST 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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