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______________________________________________________________________________
SGI Security Advisory
Title: Samba for IRIX vulnerability
Number: 20011002-01-P
Date: October 30, 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" 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 ---
- -----------------------
The Samba Security Team at http://www.samba.org/ has reported a vulnerability
in Samba that can lead to a root compromise if the default configuration on
Samba for IRIX is changed.
The vulnerability has been discovered in all versions of Samba prior to
version 2.2.1a and allows an attacker to gain root access on the vulnerable
systems for certain types of Samba configurations.
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. This issue has been
corrected in future releases of Samba for IRIX.
- --------------
- --- Impact ---
- --------------
The Samba package is not installed by default on IRIX.
Any SGI IRIX system running a version of Samba older than Samba 2.2.1a
may be vulnerable if the default configuration for Samba log has changed.
A local user account on the vulnerable system is not required
in order to exploit these issues.
The exploitable vulnerability can lead to a root compromise under
certain configurations detailed on the Samba website:
http://us1.samba.org/samba/whatsnew/macroexploit.html
The default Samba log configuration (log.%m) shipped with IRIX is not
vulnerable to this exploit.
This vulnerability have been publicly discussed in Usenet
newsgroups and security mailing lists.
This Samba vulnerability was reported by The Samba Security Team:
http://us1.samba.org/samba/whatsnew/macroexploit.html
http://www.securityfocus.com/bid/2928
- --------------------------
- --- Temporary Solution ---
- --------------------------
An immediate fix is available from Samba Website:
http://us1.samba.org/samba/whatsnew/macroexploit.html
If you are running Samba 2.2.0, the temporary workaround is to
edit your smb.conf configuration file and remove all occurrences
of the macro "%m". Replacing occurrences of %m with %I is
probably the best workaround for most sites.
- ----------------
- --- Solution ---
- ----------------
SGI recommends upgrading to Samba version 2.2.1a as the proper
solution for this problem.
The fixed free version can be downloaded from http://www.samba.org/
or http://freeware.sgi.com/
For customers who have purchased the SGI supported version of
Samba, please contact your SGI Support Representative and
request part number 812-0893-004 -- Samba 2.2.1a for IRIX on CD.
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.
- ------------------------
- --- Acknowledgments ----
- ------------------------
SGI wishes to thank the the Samba team and users of 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------
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------oOo------
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------oOo------
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------oOo------
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______________________________________________________________________________
This information is provided freely to all interested parties
and may be redistributed provided that it is not altered in any
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