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CERT Advisory
CA-2002-35 Vulnerability in RaQ 4 Servers
Original
release date: December 11, 2002
Last revised: --
Source: CERT/CC
A complete
revision history can be found at the end of this file.
Systems
Affected
* Sun
Cobalt RaQ 4 Server Appliances with the Security Hardening
Package installed
Overview
A remotely
exploitable vulnerability has been discovered in Sun Cobalt
RaQ 4 Server Appliances running Sun's Security Hardening Package
(SHP). Exploitation of this vulnerability may allow remote attackers
to execute arbitrary code with superuser privileges.
I. Description
Cobalt
RaQ 4 is a Sun Server Appliance. For background information on
Cobalt RaQ 4, please see the COBALT RaQ 4 User Manual. Sun provides
a
Security Hardening Package (SHP) for Cobalt RaQ 4. Although the SHP
is
not installed by default, many users choose to install it on their RaQ
4 servers. For background information on the SHP, please see the SHP
RaQ 4 User Guide.
A vulnerability
in the SHP may allow a remote attacker to execute
arbitrary code on a Cobalt RaQ 4 Server Appliance. The vulnerability
occurs in a cgi script that does not properly filter input.
Specifically, overflow.cgi does not adequately filter input destined
for the email variable. Because of this flaw, an attacker can use a
POST request to fill the email variable with arbitrary commands. The
attacker can then call overflow.cgi, which will allow the command the
attacker filled the email variable with to be executed with superuser
privileges.
An exploit
is publicly available and may be circulating.
Further
information about this vulnerability may be found in VU#810921
in the CERT/CC Vulnerability Notes Database.
II. Impact
A remote
attacker may be able to execute arbitrary code on a Cobalt
RaQ 4 Server Appliance with the SHP installed.
III. Solution
Apply a
patch from your vendor
Appendix
A contains information provided by vendors for this advisory.
As vendors report new information to the CERT/CC, we will update this
section and note the changes in our revision history. If a particular
vendor is not listed below, we have not received their comments.
Please contact your vendor directly.
Workarounds
Block
access to the Cobalt RaQ 4 administrative httpd server
(typically ports 81/TCP and 444/TCP) at your network perimeter. Note
that this will not protect vulnerable hosts within your network
perimeter. It is important to understand your network configuration
and service requirements before deciding what changes are appropriate.
Caveats
The patch
supplied by Sun removes the SHP completely. If your
operation requires the use of the SHP, you may need to find a suitable
alternative.
Appendix
A. - Vendor Information
Sun Microsystems
Sun confirms
that a remote root exploit does affect the Sun/Cobalt
RaQ4 platform if the SHP (Security Hardening Patch) patch was
installed.
Sun has
released a Sun Alert which describes how to remove the SHP
patch:
http://sunsolve.Sun.COM/pub-cgi/retrieve.pl?doc=fsalert/49377
The removal
patch is available from:
http://ftp.cobalt.sun.com/pub/packages/raq4/eng/RaQ4-en-Security-2.0.1-SHP_REM.pkg
Appendix
B. - References
1. CERT/CC
Vulnerability Note: VU#810921 - http://www.kb.cert.org/vuls/id/810921
2. Sun SHP RaQ 4 User Guide - http://www.sun.com/hardware/serverappliances/pdfs/support/RaQ_4_SHP_UG.pdf
3. COBALT RaQ 4 User Manual - http://www.sun.com/hardware/serverappliances/pdfs/manuals/manual.raq4.pdf
_________________________________________________________________
grazer@digit-labs.org
publicly reported this vulnerability.
_________________________________________________________________
Author:
Ian A. Finlay.
______________________________________________________________________
This document
is available from:
http://www.cert.org/advisories/CA-2002-35.html
______________________________________________________________________
CERT/CC
Contact Information
Email:
cert@cert.org
Phone: +1 412-268-7090 (24-hour hotline)
Fax: +1 412-268-6989
Postal address:
CERT Coordination Center
Software Engineering Institute
Carnegie Mellon University
Pittsburgh PA 15213-3890
U.S.A.
CERT/CC
personnel answer the hotline 08:00-17:00 EST(GMT-5) /
EDT(GMT-4) Monday through Friday; they are on call for emergencies
during other hours, on U.S. holidays, and on weekends.
Using encryption
We strongly
urge you to encrypt sensitive information sent by email.
Our public PGP key is available from
http://www.cert.org/CERT_PGP.key
If you
prefer to use DES, please call the CERT hotline for more
information.
Getting
security information
CERT publications
and other security information are available from
our web site
http://www.cert.org/
To subscribe
to the CERT mailing list for advisories and bulletins,
send email to majordomo@cert.org. Please include in the body of your
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* "CERT"
and "CERT Coordination Center" are registered in the U.S.
Patent and Trademark Office.
______________________________________________________________________
NO WARRANTY
Any material furnished by Carnegie Mellon University and the Software
Engineering Institute is furnished on an "as is" basis. Carnegie
Mellon University makes no warranties of any kind, either expressed
or
implied as to any matter including, but not limited to, warranty of
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does not make any warranty of any kind with respect to freedom from
patent, trademark, or copyright infringement.
_________________________________________________________________
Conditions
for use, disclaimers, and sponsorship information
Copyright
2002 Carnegie Mellon University.
Revision
History
December 11, 2002: Initial release
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