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Category:   Application (Generic)  >   ToolTalk (rpc.ttdbserver) Vendors:   SGI (Silicon Graphics)
(SGI Issues Fix) Re: Common Desktop Environment (CDE) ToolTalk Server Input Validation and Symlink Bugs Let Local and Remote Users Obtain Root Privileges on the System
SecurityTracker Alert ID:  1005538
SecurityTracker URL:  http://securitytracker.com/id/1005538
CVE Reference:   CVE-2002-0677, CVE-2002-0678   (Links to External Site)
Date:  Nov 5 2002
Impact:   Denial of service via local system, Denial of service via network, Execution of arbitrary code via network, Modification of system information, Modification of user information, Root access via local system, Root access via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Several vulnerabilities were reported in the Common Desktop Environment (CDE) ToolTalk RPC database server. A remote user could delete arbitrary files, cause denial of service conditions, or execute arbitrary code or commands on the system. A local user could create or overwrite arbitrary files with arbitrary user-supplied contents.

CORE Security Technologies reported that a remote user can also create arbitrary directory entries on the target host.

Several operating systems are affected, including Solaris, HP-UX, Tru64, AIX, and Caldera Open UNIX/UnixWare. Other operating systems may also be affected.

According to the report, Fujitsu UXP/V, Cray's CrayTools, Caldera OpenLinux, and SCO OpenServer are not vulnerable.

According to CORE and CERT (as reported in CERT Advisory CA-2002-20), the ToolTalk RPC database server (rpc.ttdbserverd) does not properly validate a user-supplied file descriptor argument passed to the _TT_ISCLOSE() function. A remote user may be able to overwrite a certain 4 bytes of memory with a zero (0x0L) value.

A remote user could exploit this bug to delete any file on the system that is accessible by the ToolTalk RPC database server. Because the server typically runs with root privileges, any file on the system could be deleted. It may also be possible for the remote user to cause arbitrary code and commands to be executed.

The software also reportedly does not properly validate certain file operations, such as verifying whether a file to be written to is a valid file or a symbolic link. A local user could reference a specially crafted symbolic link in certain ToolTalk RPC requests to overwrite files on the system. Because the server typically runs with root privileges, any file on the system could be overwritten. This could allow the local user to obtain elevated privileges on the system (including root privileges).

Impact:   A remote user could delete arbitrary files, cause denial of service conditions, or execute arbitrary code or commands on the system. A local user could create or overwrite arbitrary files with arbitrary user-supplied contents.
Solution:   SGI has provided a patch for CDE 5.2 for IRIX 6.5 through 6.5.17

##### Patch File Checksums ####

The actual patch will be a tar file containing the following files:
Filename: README.patch.4799
Algorithm #1 (sum -r): 52132 8 README.patch.4799
Algorithm #2 (sum): 53618 8 README.patch.4799
MD5 checksum: EA29DFD4E784C9968E8CD7BA688935CA

Filename: patchSG0004799
Algorithm #1 (sum -r): 38262 4 patchSG0004799
Algorithm #2 (sum): 64719 4 patchSG0004799
MD5 checksum: 4A56E2BC6D3A6B11AAB68B50A9AE12C8

Filename: patchSG0004799.cde_sw
Algorithm #1 (sum -r): 57766 7281 patchSG0004799.cde_sw
Algorithm #2 (sum): 36577 7281 patchSG0004799.cde_sw
MD5 checksum: 59F6CC85F7B76A408D5D68516B9ED0AD

Filename: patchSG0004799.idb
Algorithm #1 (sum -r): 20823 4 patchSG0004799.idb
Algorithm #2 (sum): 19434 4 patchSG0004799.idb
MD5 checksum: A69541B271F8B9486CD0F4F4747F00A3

Vendor URL:  www.sgi.com/support/security/advisories.html (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  UNIX (SGI/IRIX)
Underlying OS Comments:  IRIX 6.5 through 6.5.17

Message History:   This archive entry is a follow-up to the message listed below.
Jul 11 2002 Common Desktop Environment (CDE) ToolTalk Server Input Validation and Symlink Bugs Let Local and Remote Users Obtain Root Privileges on the System



 Source Message Contents

Subject:  IRIX CDE ToolTalk rpc.ttdbserverd vulnerabilities


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

______________________________________________________________________________
                          SGI Security Advisory

         Title:  CDE ToolTalk rpc.ttdbserverd vulnerabilities
        Number:  20021101-01-P
          Date:  November 5, 2002
     Reference:  CAN-2002-0677
     Reference:  CAN-2002-0678
     Reference:  CERT CA-2002-20
     Reference:  SGI BUG 860033
     Reference:  Fixed in CDE 5.2 and patch 4799
______________________________________________________________________________

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

It's been reported that there are vulnerabilities in the CDE
/usr/dt/bin/rpc.ttdbserverd daemon.

See http://www.cert.org/advisories/CA-2002-20.html for additional details.

This vulnerability has been assigned the following CVEs:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0677
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0678

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 by a patch and in future releases of CDE.


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

The CDE rpc.ttdbserverd binary is not installed by default on IRIX 6.5
systems. It is part of the optional IRIX CDE package (cde.sw.eoe).

To determine the version of IRIX you are running, execute the following
command:

  # uname -R

That will return a result similar to the following:

  # 6.5 6.5.16f

The first number ("6.5") is the release name, the second ("6.5.16f" in this
case) is the extended release name.  The extended release name is the
"version" we refer to throughout this document.

To see if rpc.ttdbserverd is installed, execute the following command:

  % versions long | grep usr/dt/bin/rpc.ttdbserverd
  f  3899   594 cde.sw.eoe              usr/dt/bin/rpc.ttdbserverd

If the output of the command is similar to the above, then rpc.ttdbserverd
is installed and the system may be vulnerable.


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

There is no effective workaround available for these vulnerabilities.
SGI recommends upgrading to CDE 5.2 and installing the appropriate
patch from the listing below.


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

SGI has provided a patch for CDE 5.2.

   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           4799        Notes 2 & 3
   IRIX 6.5.1        yes           4799        Notes 2 & 3
   IRIX 6.5.2        yes           4799        Notes 2 & 3
   IRIX 6.5.3        yes           4799        Notes 2 & 3
   IRIX 6.5.4        yes           4799        Notes 2 & 3
   IRIX 6.5.5        yes           4799        Notes 2 & 3
   IRIX 6.5.6        yes           4799        Notes 2 & 3
   IRIX 6.5.7        yes           4799        Notes 2 & 3
   IRIX 6.5.8        yes           4799        Notes 2 & 3
   IRIX 6.5.9        yes           4799        Notes 2 & 3
   IRIX 6.5.10       yes           4799        Notes 2 & 3
   IRIX 6.5.11       yes           4799        Notes 2 & 3
   IRIX 6.5.12       yes           4799        Notes 2 & 3
   IRIX 6.5.13       yes           4799        Notes 2 & 3
   IRIX 6.5.14       yes           4799        Notes 2 & 3
   IRIX 6.5.15       yes           4799        Notes 2 & 3
   IRIX 6.5.16       yes           4799        Notes 2 & 3
   IRIX 6.5.17       yes           4799        Notes 2 & 3

   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 CDE 5.2 and install patch 4799.

                ##### Patch File Checksums ####

The actual patch will be a tar file containing the following files:
Filename:                 README.patch.4799
Algorithm #1 (sum -r):    52132 8 README.patch.4799
Algorithm #2 (sum):       53618 8 README.patch.4799
MD5 checksum:             EA29DFD4E784C9968E8CD7BA688935CA

Filename:                 patchSG0004799
Algorithm #1 (sum -r):    38262 4 patchSG0004799
Algorithm #2 (sum):       64719 4 patchSG0004799
MD5 checksum:             4A56E2BC6D3A6B11AAB68B50A9AE12C8

Filename:                 patchSG0004799.cde_sw
Algorithm #1 (sum -r):    57766 7281 patchSG0004799.cde_sw
Algorithm #2 (sum):       36577 7281 patchSG0004799.cde_sw
MD5 checksum:             59F6CC85F7B76A408D5D68516B9ED0AD

Filename:                 patchSG0004799.idb
Algorithm #1 (sum -r):    20823 4 patchSG0004799.idb
Algorithm #2 (sum):       19434 4 patchSG0004799.idb
MD5 checksum:             A69541B271F8B9486CD0F4F4747F00A3


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

SGI wishes to thank Core SDI, 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 such as aaanalyst@sgi.com >
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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