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Home » Hacking News » IRIX 20020305-01-I-FTP Bounce vulnerability

IRIX 20020305-01-I-FTP Bounce vulnerability

by Nikola Strahija on April 1st, 2002 An attacker may be able to scan networks that they wouldn't otherwise have access to. An attacker may be able to conceal the true origin of a portscanning attempt.


CERT reported this vulnerability:
http://www.cert.org/advisories/CA-1997-27.html

This vulnerability has been publicly discussed in Usenet
newsgroups and security mailing lists.


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

With IRIX 6.5.6 or better, one can run the ftpd daemon with the -p
option to prevent this vulnerability:

1) Become the root user on the system.

% /bin/su -
Password:
#

2) Edit the file /etc/inetd.conf with your favorite text editor.

# vi /etc/inetd.conf

{Find the following line}

ftp stream tcp nowait root /usr/etc/ftpd ftpd -l

{Add the -p option}

ftp stream tcp nowait root /usr/etc/ftpd ftpd -lp

{Save the file}

3) Force inetd to re-read the configuration file.

# /etc/killall -HUP inetd

4) Kill any existing ftpd process.

# /etc/killall telnetd

5) Return to previous level.

# exit
%

- -------------
- --- 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.


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

SGI wishes to thank CERT, NASA, and the 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
[email protected]

------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
[email protected]

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 [email protected]
subscribe wiretap
end
^d

In the example above, 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 [email protected]

For reporting *NEW* SGI security issues, email can be sent to
[email protected] 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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