Date: Wed, 4 Dec 2002 14:31:04 -0800
From: SGI Security Coordinator <[email protected]>
To: [email protected]Subject: Buffer Overflow Vulnerability in X Font Server on IRIX
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______________________________________________________________________________
SGI Security Advisory
Title : Buffer Overflow Vulnerability in X Font Server
Number : 20021202-01-I
Date : December 4, 2002
Reference: CERT CA-2002-34, VU#312313
Reference: ISS X-Force Alert #21541
Reference: CVE CAN-2002-1317
Fixed in : IRIX 6.5.14
______________________________________________________________________________
- -----------------------
- --- Issue Specifics ---
- -----------------------
It's been reported that there is a buffer overflow vulnerability in the
X font server used in IRIX versions prior to 6.5.14. It was discovered,
as part of the non-security related X11 updates done to IRIX 6.5.14,
this vulnerability was fixed.
See the following URLs for additional details:
http://www.cert.org/advisories/CA-2002-34.htmlhttp://www.kb.cert.org/vuls/id/312313http://bvlive01.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21541
CERT assigned the following CVE candidates to this vulnerability:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1317
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 IRIX 6.5.14 and later versions.
- --------------
- --- Impact ---
- --------------
The /usr/bin/X11/xfs binary is installed by default on IRIX 6.5 systems as
part of x_eoe.sw.Server.
To determine the version of IRIX you are running, execute the following
command:
# /bin/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 this
case) is the extended release name. The extended release name is the
"version" we refer to throughout this document.
This vulnerability can be exploited by a remote user (no account on the
local machine is required), and can result in the remote user gaining root
access.
- ----------------------------
- --- 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 the following workaround:
# chkconfig fontserver off
# /etc/init.d/fontserver stop
Of course, you will no longer have the services of the font server available
after doing this.
SGI recommends upgrading to IRIX 6.5.14 or later as a permanent fix for this
problem.
- ----------------
- --- Solution ---
- ----------------
SGI has not provided patches for this vulnerability. Our recommendation is
to upgrade to IRIX 6.5.14 or later.
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 no
IRIX 6.5.15 no
IRIX 6.5.16 no
IRIX 6.5.17 no
IRIX 6.5.18 no
IRIX 6.5.19 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) Upgrade to IRIX 6.5.14 or later.
- ------------------------
- --- Acknowledgments ----
- ------------------------
SGI wishes to thank ISS X-Force and the users of the Internet Community at
large 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------
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______________________________________________________________________________
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