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______________________________________________________________________________
                          SGI Security Advisory

        Title: Apache vulnerabilities on IRIX
        Number: 20020301-01-P
        Date: March 15, 2002
        Reference: CVE CAN-2001-0729
        Reference: CVE CAN-2001-0730
        Reference: CVE CAN-2001-0731
______________________________________________________________________________

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 security vulnerabilities in Apache
webservers the versions of Apache we've shipped with IRIX.

   * A vulnerability was found in the split-logfile support program. A
   request with a specially crafted Host: header could allow any file with a
   .log extension on the system to be written to if the "split logfile"
   feature is in use, which is not the default.

   * A vulnerability was found when Multiviews are used to negotiate the
   directory index. In some configurations, requesting a URI with a
   QUERY_STRING of M=D could return a directory listing rather than the
   expected index page.

SGI has investigated the issues 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
in IRIX 6.5.15, where we are now supplying Apache version 1.3.22.

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

The Apache webserver is supplied with IRIX versions since 6.5.12m/f as a
replacement for the older SGI FastTrack server. It is installed by default,
and is enabled through "chkconfig" by default.

In order to determine if an SGI-supported version of Apache is installed,
execute the following command:

  # versions -b | grep sgi_apache

If a line similar to the following line is returned, then a vulnerable
version of Apache is installed:

  I sgi_apache 10/30/2001 SGI Web Server based on Apache, 1.3.20a

If a line similar to the following is returned, then version of Apache that is
installed is not vulnerable to the security issues addressed in this advisory:

  I sgi_apache 01/23/2002 SGI Web Server based on Apache, 1.3.22

These vulnerabilities might lead to a root compromise in some
configurations, and no local user account is required.

These vulnerabilities have been reported by ApacheWeek and have been
publicly discussed in Usenet newsgroups and mailing lists.
http://www.apacheweek.com/issues/00-09-22
http://www.apacheweek.com/issues/01-10-05#security

These apache vulnerabilities were assigned the following CVEs:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0729
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0730
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0731

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

SGI acknowledges that it may not always be possible to immediately install
patches or upgrade the operating system. In those cases, we recommend
disabling the Apache webserver by using the following command:

  # /etc/init.d/apache stop

Then ensure it will not restart when the system is rebooted by issuing the
following command:

  # chkconfig apache off

For further insurance, you can uninstall it with the following command:

  # versions remove sgi_apache*

It is not necessary to reboot the system after doing this. You should
upgrade the operating system as soon as it is possible to do so.

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

SGI has not provided a patch for these issues, but instead has rolled the
Apache 1.3.22 distribution into IRIX 6.5.15 and later releases of the
operating system.

   OS Version Vulnerable? Patch # Other Actions
   ---------- ----------- ------- -------------
   IRIX 3.x no Note 1
   IRIX 4.x no Note 1
   IRIX 5.x no Note 1
   IRIX 6.0.x no Note 1
   IRIX 6.1 no Note 1
   IRIX 6.2 no Note 1
   IRIX 6.3 no Note 1
   IRIX 6.4 no Note 1
   IRIX 6.5 no Note 2
   IRIX 6.5.1 no Note 2
   IRIX 6.5.2 no Note 2
   IRIX 6.5.3 no Note 2
   IRIX 6.5.4 no Note 2
   IRIX 6.5.5 no Note 2
   IRIX 6.5.6 no Note 2
   IRIX 6.5.7 no Note 2
   IRIX 6.5.8 no Note 2
   IRIX 6.5.9 no Note 2
   IRIX 6.5.10 no Note 2
   IRIX 6.5.11 no Note 2
   IRIX 6.5.12 yes sgi_apache 1.3.22 Note 2 & 3
   IRIX 6.5.13 yes sgi_apache 1.3.22 Note 2 & 3
   IRIX 6.5.14 yes sgi_apache 1.3.22 Note 2 & 3
   IRIX 6.5.15 no

   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) Install sgi_apache 1.3.22 which is supplied with the IRIX 6.5.15
        Applications CD or available as sgi_apache-1.3.22.tar from:
        ftp://patches.sgi.com/support/free/security/patches/{6.5.12-6.5.14}

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

The actual patch will be a tar file containing the following files:

Filename: sgi_apache
Algorithm #1 (sum -r): 53827 6 sgi_apache
Algorithm #2 (sum): 46547 6 sgi_apache
MD5 checksum: B0AD8BED8F9F7FAA8AEC0A97002C10CB

Filename: sgi_apache.books
Algorithm #1 (sum -r): 02961 2858 sgi_apache.books
Algorithm #2 (sum): 44391 2858 sgi_apache.books
MD5 checksum: 9E2B175B9B4CD20E3A9AD75C14EEFEE0

Filename: sgi_apache.idb
Algorithm #1 (sum -r): 09227 218 sgi_apache.idb
Algorithm #2 (sum): 49194 218 sgi_apache.idb
MD5 checksum: 45519FF6EFAC71BD0BBB1764DE3693D5

Filename: sgi_apache.man
Algorithm #1 (sum -r): 02004 86 sgi_apache.man
Algorithm #2 (sum): 473 86 sgi_apache.man
MD5 checksum: 4D4724DC0F7257E4E94E76B3C4EC2170

Filename: sgi_apache.src
Algorithm #1 (sum -r): 42099 4255 sgi_apache.src
Algorithm #2 (sum): 39837 4255 sgi_apache.src
MD5 checksum: 0B840255E1180FE0F237649CAA4C00B0

Filename: sgi_apache.sw
Algorithm #1 (sum -r): 08271 1703 sgi_apache.sw
Algorithm #2 (sum): 21058 1703 sgi_apache.sw
MD5 checksum: B93134BFE21F87858BD4B34B3B32F5B6

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

SGI wishes to thank CVE, the Apache Foundation and the users of the Internet
Community at large for their assistance in this matter.

- -------------------
- --- References ----
- -------------------

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-infosgi.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-infosgi.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-requestsgi.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-infosgi.com.

For reporting *NEW* SGI security issues, email can be sent to
security-alertsgi.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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