Published:
31 October 2001
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2001.459 -- SGI Security Advisory 20011002-01-P
Samba for IRIX vulnerability
1 November 2001
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Samba prior to version 2.2.1a
Vendor: SGI
Impact: Root Compromise
Access Required: Remote
Ref: ESB-2001.285
ESB-2001.264
ESB-2001.257
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
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------
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.
- -----BEGIN PGP SIGNATURE-----
Version: 2.6.2
iQCVAwUBO977cbQ4cFApAP75AQGvdAQAjTvOC9jnykkbal/fVakXKjSlPjfI0i0E
HFnjuwn63tb2UzNGe3koEhchHvoPg8wROTPX3A0cGDT/r4XDYgBQByEI8A/kYMJF
jsXnELudfROkUOOMJWRh8919O86HGwx9C8+LohHIAH52SlHfSYL8Sgb0qBs6qLg7
XwEndfQ14VU=
=YLK1
- -----END PGP SIGNATURE-----
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/Information/advisories.html
If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key
iQCVAwUBO+FzQih9+71yA2DNAQE3mgP/fodA4QpB3zsm41fU74tOChUDZSOuhEsy
radmGUXodgPGV3cYyGlB96k6/RluVKdNdoIRj5TE0vzPeSBBT7w3IS7bZsU6u1pN
Gxkr1HCmA+plML23VAOb9nH5/dtzo62RJq8uWKJMgOTIaMyGJ2ibfoVU6ByQRDSZ
rS1gkoRmvj4=
=rT3F
-----END PGP SIGNATURE-----