Date: Tue, 13 Aug 2002 16:12:19 -0700 (PDT)
From: SGI Security Coordinator <[email protected]>
To: [email protected]Subject: IRIX ftpd minor vulnerabilities
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_________________________________________________________________________=
____
SGI Security Advisory
Title: ftpd minor vulnerabilities
Number: 20020305-03-I
Date: August 13, 2002
Reference: CERT=AE Vulnerability Note VU# 2558
Reference: CERT=AE CA-1997-27
Reference: SGI Security Advisory 20020305-02-I
Reference: CVE-1999-0351
Reference: CVE-1999-0017
_________________________________________________________________________=
____
- -----------------------
- --- Issue Specifics ---
- -----------------------
It has been reported that there are fundamental design issues in the FTP
protocol which exhibit themselves as vulnerabilities in the ftpd daemon.
1) the "Pizza Thief" exploit, a minor security issue involving FTP
connections when the PASV mode is being used.
See the following URLs for additional details:
http://www.kb.cert.org/vuls/id/2558http://www.infowar.com/iwftp/iw_sec/iw_sec_01.txt
2) the "FTP_PrivilegedPort" exploit, a minor security issue involving
FTP connections when the PORT mode is being used.
See the following URLs for additional details:
http://www.kbeta.com/attacklist/FTP_PrivilegedPort.htmhttp://www.cert.org/advisories/CA-1997-27.htmlftp://patches.sgi.com/support/free/security/advisories/20020305-02-I=
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 in future releases of IRIX.
- --------------
- --- Impact ---
- --------------
The binary /usr/etc/ftpd daemon is installed by default on IRIX 6.5 syste=
ms
as part of eoe.sw.base.
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 th=
is
case) is the extended release name. The extended release name is the
"version" we refer to throughout this document.
A local account is required to exploit the FTP_PrivilegedPort exploit,
but not the the Pizza Thief exploit.
The "Pizza Thief" exploit was assigned the following CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-1999-0351
The FTP Privileged Port exploit was assigned the following CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-1999-0017
- ----------------------------
- --- Temporary Workaround ---
- ----------------------------
SGI understands that there are times when upgrading the operating system =
or
installing patches are inconvenient or not possible. In those instances,=
we
recommend disabling ftpd as a workaround until the operating system can b=
e
upgraded. Follow these steps to disable ftpd:
1) become superuser
% su -
2) edit the /etc/inetd.conf file
# vi /etc/inetd.conf
3) find the line in inetd.conf that looks like this:
ftp stream tcp nowait root /usr/etc/ftpd ftpd -l
4) comment the line out so it looks like the following line:
#ftp stream tcp nowait root /usr/etc/ftpd ftpd -l
...then save the file and exit from the editor.
5) send a hangup signal to the inetd daemon to get it to reread the
configuration file and implement the changes:
# killall -HUP inetd
6) kill any running ftpd processes:
# killall ftpd
It is not necessary to reboot the system after performing this procedure.=
Note that ftp server services will no longer be available from the system=
after performing these steps. Normal ftp client services will still be
available.
- ----------------
- --- Solution ---
- ----------------
SGI has not provided patches for these minor vulnerabilities. Our
recommendation is to upgrade to IRIX 6.5.17 when available.
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 Notes 2 & 3
IRIX 6.5.1 yes Notes 2 & 3
IRIX 6.5.2 yes Notes 2 & 3
IRIX 6.5.3 yes Notes 2 & 3
IRIX 6.5.4 yes Notes 2 & 3
IRIX 6.5.5 yes Notes 2 & 3
IRIX 6.5.6 yes Notes 2 & 3
IRIX 6.5.7 yes Notes 2 & 3
IRIX 6.5.8 yes Notes 2 & 3
IRIX 6.5.9 yes Notes 2 & 3
IRIX 6.5.10 yes Notes 2 & 3
IRIX 6.5.11 yes Notes 2 & 3
IRIX 6.5.12 yes Notes 2 & 3
IRIX 6.5.13 yes Notes 2 & 3
IRIX 6.5.14 yes Notes 2 & 3
IRIX 6.5.15 yes Notes 2 & 3
IRIX 6.5.16 yes Notes 2 & 3
IRIX 6.5.17 no Note 4
NOTES
1) This version of the IRIX operating has been retired. Upgrade to a=
n
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 y=
our
SGI Support Provider or URL: http://support.sgi.com/irix/swupdate=
s/
3) Upgrade to IRIX 6.5.17 or use the supplied workaround.
IRIX 6.5.17 maintenance release can be downloaded from:
http://support.sgi.com/colls/patches/tools/relstream/index.html
4) ftpd must be run with the -p flag for this to take effect.
- ------------------------
- --- Acknowledgments ----
- ------------------------
SGI wishes to thank FIRST and the users of the Internet Community at larg=
e
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
[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 th=
e
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
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------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
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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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