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From: agent99 at (SGI Security Coordinator)
Subject: CDE libDtHelp and dtlogin vulnerabilities on IRIX



                          SGI Security Advisory

   Title:      libDtHelp and dtlogin vulnerabilities
   Number:     20040801-01-P
   Date:       August 3, 2004
   Reference:  SGI BUG 902695, CVE CAN-2003-0834, CERT VU#575804
   Reference:  SGI BUG 913116, CVE CAN-2004-0368, CERT VU#179804
   Fixed in:   CDE 5.3.4

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"
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.

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

It has been reported that there are two vulnerabilities in Common Desktop
Environment (CDE) which can be used to obtain root user privileges:

* 902695: libDtHelp has a buffer overflow

* 913116: dtlogin double-free vulnerability

A new CDE package has been released to address these vulnerabilities.

SGI has investigated the issue and recommends the following steps for
resolving this issue.  It is HIGHLY RECOMMENDED that these measures
be implemented on ALL vulnerable SGI systems.

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

CDE is an optional product and is not installed by default.

To determine if CDE is installed, execute the following

  # /usr/sbin/versions -b CDE

This will return a result similar to the following:

     Name                 Date        Description
  I  CDE                  5/11/03     Common Desktop Environment, 5.3.3

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

SGI has provided a new CDE 5.3.4 inst package to address these security issues.
The new CDE 5.3.4 inst package is available on the IRIX 6.5.25 Applications
CD or

         Version                      Vulnerable?   Other Actions
- ---------------------------------     -----------   -------------
Common Desktop Environment, 5.0        unknown      Note 1
Common Desktop Environment, 5.1        unknown      Note 1
Common Desktop Environment, 5.2        unknown      Note 1
Common Desktop Environment, 5.3        unknown      Note 1
Common Desktop Environment, 5.3.1      unknown      Note 1
Common Desktop Environment, 5.3.2      unknown      Note 1
Common Desktop Environment, 5.3.3       yes         Notes 2 & 3
Common Desktop Environment, 5.3.4       no


     1) This version of the CDE is not actively supported.
        Upgrade to an actively supported CDE package.
        See for more information.

     2) Install the new CDE 5.3.4 inst package from IRIX 6.5.25 Applications
        CD or

     3) libDtHelp vulnerability is also addressed with patch 5386,
        but does not include the dtlogin fix.

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

SGI wishes to thank CERT, Dave Aitel and FIRST for their assistance
in this matter.

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

SGI Security Advisories can be found at: and

Red Hat Errata: Security Alerts, Bugfixes, and Enhancements

SGI Advanced Linux Environment security updates can found on:

SGI patches can be found at the following patch servers:

The primary SGI anonymous FTP site for security advisories and
security patches is

- -----------------------------------------
- --- SGI Security Information/Contacts ---
- -----------------------------------------

If there are questions about this document, email can be sent to


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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  Security advisories and patches are located under the URL

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      This information is provided freely to all interested parties
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