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Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00178
Date: November 9, 1998
Cross-Ref: ISS Security Advisory: Hidden community string in SNMP
implementation
Title: SNMP
________________________________________________________________________________
The information contained in this Security Bulletin is provided "AS IS."
Sun makes no warranties of any kind whatsoever with respect to the information
contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS,
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW.
IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE,
PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL
OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY
ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN
THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF
THE POSSIBILITY OF SUCH DAMAGES.
If any of the above provisions are held to be in violation of applicable law,
void, or unenforceable in any jurisdiction, then such provisions are waived
to the extent necessary for this disclaimer to be otherwise enforceable in
such jurisdiction.
________________________________________________________________________________
1. Background
Solstice Enterprise Agents(tm) expands the scope of enterprise management
by providing a comprehensive development and runtime environment
enabling the creation of custom, extensible agents for device and
system management for the Solaris(tm) operating environment. Solstice
Enterprise Agents(SEA) supports both the Simple Network Management
Protocol and DMI protocols.
Simple Network Management Protocol(SNMP) was designed to allow the
remote management of systems and devices on a network. SNMP relies on
processes known as master agents and subagents. Upon invocation,
agents read various configuration files and maintain Management
Information Bases(MIBs). Access to information in the MIBs can be
controlled by community strings. A default community string is present
in the Sun SNMP subagent that may be exploited by remote attackers to
modify system parameters or execute arbitrary commands with root
privileges.
SEA was initially available as an unbundled product and later bundled
with Solaris 2.6 at version 1.0.1.
2. Recommendations
Sun recommends that sites running Solaris 2.6 and sites running SEA on
Solaris 2.5.1 upgrade the SEA software to SEA 1.0.3.
SEA 1.0.3 is bundled with Solaris 7. SEA 1.0.3 is available for Solaris
2.6, 2.6_x86, 2.5.1, and 2.5.1_x86 and may be downloaded from:
http://www.sun.com/solstice/products/ent.agents/
Sun also recommends that sites running SEA 1.0 on Solaris 2.4 and 2.5
either disable SEA (see section 3) or upgrade the operating system to
Solaris 7 if possible. Sites upgrading to Solaris 2.5.1 or 2.6 may
obtain SEA 1.0.3 from the URL listed above.
3. Workaround
Sun recommends that you disable SEA on vulnerable systems until
SEA 1.0.3 is installed.
To determine if your system is using SEA, use pkginfo on one of the
following SEA packages: SUNWmibii, SUNWsacom, SUNWsadmi, SUNWsasnm.
For example, on SEA 1.0 and 1.0.1, a pkginfo on SUNWmibii will display
as follows:
% pkginfo SUNWmibii
system SUNWmibii Solstice Enterprise Agent SNMP daemon
On SEA 1.0.2:
% pkginfo SUNWmibii
system SUNWmibii Solstice Enterprise Agents 1.0.2 SNMP daemon
To disable SEA, perform the following steps:
% su
Password:
# /etc/init.d/init.snmpdx stop
# mv /etc/rc3.d/S76snmpdx /etc/rc3.d/DISABLED_S76snmpdx
_______________________________________________________________________________
APPENDICES
A. Patches listed in this bulletin are available to all Sun customers via
World Wide Web at:
<URL:http://sunsolve.sun.com/sunsolve/pubpatches/patches.html>
B. Checksums for the patches listed in this bulletin are available via
World Wide Web at:
<URL:http://sunsolve.sun.com/sunsolve/pubpatches/patches.html>
C. Sun security bulletins are available via World Wide Web at:
<URL:http://sunsolve.sun.com/sunsolve/secbulletins>
D. Sun Security Coordination Team's PGP key is available via World Wide Web
at:
<URL:http://sunsolve.sun.com/sunsolve/secbulletins/SunSCkey.txt>
E. To report or inquire about a security problem with Sun software, contact
one or more of the following:
- Your local Sun answer centers
- Your representative computer security response team, such as CERT
- Sun Security Coordination Team. Send email to:
security-alertat_private
F. To receive information or subscribe to our CWS (Customer Warning System)
mailing list, send email to:
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with a subject line (not body) containing one of the following commands:
Command Information Returned/Action Taken
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________________________________________________________________________________
Copyright 1998 Sun Microsystems, Inc. All rights reserved. Sun,
Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries. This
Security Bulletin may be reproduced and distributed, provided that this
Security Bulletin is not modified in any way and is attributed to
Sun Microsystems, Inc. and provided that such reproduction and distribution
is performed for non-commercial purposes.
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