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Buffer Overflow in System V Derived Login

daemon@ATHENA.MIT.EDU (SGI Security Coordinator)
Mon Dec 17 19:00:02 2001

Date: Mon, 17 Dec 2001 14:31:08 -0800 (PST)
From: SGI Security Coordinator <agent99@sgi.com>
Message-Id: <10112171431.ZM399831@einstein.csd.sgi.com>
Reply-To: agent99@sgi.com
To: agent99@sgi.com
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_________________________________________________________________________=
_____
                          SGI Security Advisory

         Title:  Buffer Overflow in System V Derived Login
        Number:  20011201-01-I
     Reference:  CERT=AE Advisory CA-2001-34
          Date:  December 17, 2001
_________________________________________________________________________=
_____

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

SGI provides the information in this Security Advisory on an "AS-IS" basi=
s
only, and disclaims all warranties with respect thereto, express, implied=

or otherwise, including, without limitation, any warranty of merchantabil=
ity
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 arisi=
ng
from your use of, failure to use or improper use of any of the instructio=
ns
or information in this Security Advisory.
_________________________________________________________________________=
_____


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

 login is a program that local and remote connection mechanisms often
 invoke to facilitate logging into a Unix system.

 A vulnerability has been discovered in the login program for many
 System V-derived Unix implementations that allows unauthorized root
 access.  More details can be found in CERT advisory CA-2001-34:
 http://www.cert.org/advisories/CA-2001-34.html

 Silicon Graphics has investigated the issue and finds that IRIX 3.x may
 have had this issue, as mentioned in the CERT advisory.  Any versions of=

 IRIX that are more current than IRIX 3.x, including IRIX 4.x, IRIX 5.x,
 and IRIX 6.x, do NOT have this login vulnerability, and no further actio=
n
 is required.

 -------------------
 --- Information ---
 -------------------

 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 i=
s
 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.

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

 SGI wishes to thank CERT and 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
 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 t=
he
 information and is available via anonymous FTP and the Web.

 The primary SGI anonymous FTP site for security advisories and patches i=
s
 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) a=
ll
 SGI Security Advisories when they are released. Subscribing to the maili=
ng
 list can be done via the Web
 (http://www.sgi.com/support/security/wiretap.html) or by sending email t=
o
 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 w=
ish
 the mailing list information sent to.  The word end must be on a separat=
e
 line to indicate the end of the body of the message. The control-d (^d) =
is
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 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 sen=
t 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
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