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Category:   Application (Generic)  >   SNMP Daemon Vendors:   [Multiple Authors/Vendors]
(Sun Issues Fix) Many Simple Network Management Protocol (SNMP) Implementations Allow Remote Users to Deny Service or Obtain Access to the System
SecurityTracker Alert ID:  1003525
SecurityTracker URL:  http://securitytracker.com/id/1003525
CVE Reference:   CVE-2002-0012, CVE-2002-0013   (Links to External Site)
Date:  Feb 12 2002
Impact:   Denial of service via network, Execution of arbitrary code via network, Root access via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   CERT reported that the University of Oulu (Finland) has discovered vulnerabilities in many vendor implementations of the Simple Network Management Protocol (SNMP) version 1.

The Oulu University Secure Programming Group (OUSPG, http://www.ee.oulu.fi/research/ouspg/) reports that there are numerous vulnerabilities in SNMPv1 implementations from many different vendors. A remote user can reportedly cause denial of service attacks or gain elevated privileges on the system.

The extent of the vulnerabilities depends on the specific vendor implementation. Vulnerabilities apparently include denial-of-service conditions, format string vulnerabilities, and buffer overflows. Some vulnerabilities do not require the request message to use the correct SNMP community string, according to CERT.

OUSPG reportedly performed two sets of tests of SNMP request message handling: one test focused on ASN.1 decoding, and the second looked for exceptions in the processing of the decoded data. The testers used the PROTOS c06-snmpv1 test suite:

http://www.ee.oulu.fi/research/ouspg/protos/testing/c06/snmpv1/0100.html

Some of the products implement defective SNMPv1 trap handling. A remote user can reportedly send a specially crafted SNMP trap message to an SNMP manager to trigger the vulnerability.

Some of the products implement defective SNMPv1 request handling. A remote user can reportedly send a specially crafted SNMP request message to an SNMP agent to trigger the vulnerability.

Specific technical results were not available at the time of this entry. However, CERT reports that the following vendors are affected to some degree:

3Com,
AdventNet,
CacheFlow,
Caldera,
Cisco,
Compaq,
Computer Associates,
COMTEK Services,
FreeBSD,
Hewlett Packard,
Hirschmann Electronics,
Innerdive Solutions,
Juniper Networks,
Lantronix,
Lotus,
Lucent,
Marconi,
Microsoft,
Multinet,
Netscape,
NET-SNMP,
Nokia,
Novell,
Red Hat,
Redback Networks,
SNMP Research

CERT has provided more information at the following URLs:

http://www.kb.cert.org/vuls/id/854306
http://www.kb.cert.org/vuls/id/107186

Impact:   A remote user may be able to cause denial of service conditions or may be able to obtain elevated privileges on the system.
Solution:   The vendor has released a fix and reports that the following patches are in the process of being propagated to the worldwide SunSolve sites and should be available in the very near future:

OS Version, Patch ID

SunOS 5.8, 108869-15
SunOS 5.8_x86, 108870-15
SunOS 5.7, 107709-18
SunOS 5.7_x86, 107710-18
SunOS 5.6, 106787-17
SunOS 5.6_x86, 106872-17

Sun recommends that customers install the patches listed above immediately on systems running the Sun Solstice Enterprise Master Agent, snmpdx(1M), on SunOS 5.8, 5.7, and 5.6.

Vendor URL:  sunsolve.sun.com/security (Links to External Site)
Cause:   Access control error, Boundary error, Input validation error
Underlying OS:  UNIX (Solaris - SunOS)
Underlying OS Comments:  SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6, 5.6_x86

Message History:   This archive entry is a follow-up to the message listed below.
Feb 12 2002 Many Simple Network Management Protocol (SNMP) Implementations Allow Remote Users to Deny Service or Obtain Access to the System



 Source Message Contents

Subject:  Sun Security Bulletin #00215


-----BEGIN PGP SIGNED MESSAGE-----

________________________________________________________________________________
                    Sun Microsystems, Inc. Security Bulletin

Bulletin Number:        #00215
Date:                   February 12, 2002
Cross-Ref:              CERT Advisory CA-2002-03
Title:                  snmpdx
________________________________________________________________________________

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.  Bulletins Topics

    Sun announces the release of patches for Solaris(tm) 8, 7, and
    2.6 (SunOS(tm) 5.8, 5.7, and 5.6) which relate to a buffer
    overflow in snmpdx(1M).

    Sun recommends that you install the patches listed in section 4
    immediately on systems running the Sun Solstice Enterprise
    Master Agent, snmpdx(1M), on SunOS 5.8, 5.7, and 5.6.

2.  Who is Affected

    Vulnerable:                    SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6,
                                   5.6_x86

3.  Understanding the Vulnerability

    The Sun Solstice Enterprise Master Agent, snmpdx, runs as a daemon
    process and listens to User Datagram Protocol (UDP) port 161 for
    SNMP request.  The snmpdx daemon also opens another port to receive
    SNMP trap notifications from various subagents.  These traps are
    forwarded to various managers, as determined by the configuration
    file.

    The snmpdx master agent runs as a daemon with root privileges on
    the system.  The snmpdx daemon is started by default via the
    /etc/rc3.d/S76snmpdx script.  A buffer overflow has been discovered
    in snmpdx which may be exploited by a local or a remote attacker to
    gain root access on the affected system.  Any system that does not
    run the Sun Solstice Enterprise Master Agent, sndmpx, is not
    vulnerable to this issue.  This issue was discovered by the Oulu
    University Secure Programming Group (OUSPG) who developed a PROTOS
    test suite for SNMPv1.  Information regarding the PROTOS project is
    available here:

    http://www.ee.oulu.fi/research/ouspg/protos/

    CERT Advisory CA-2002-03 is available from:

    http://www.cert.org/advisories/CA-2002-03.html

4.  List of Patches

    The following patches are in the process of being propagated to the
    worldwide SunSolve sites and should be available in the very near
    future:

    OS Version               Patch ID
    __________               _________
    SunOS 5.8                108869-15
    SunOS 5.8_x86            108870-15
    SunOS 5.7                107709-18
    SunOS 5.7_x86            107710-18
    SunOS 5.6                106787-17
    SunOS 5.6_x86            106872-17
_______________________________________________________________________________
Sun acknowledges with thanks, the Oulu University Secure Group (OUSPG),
(http://www.ee.oulu.fi/research/ouspg/) for bringing this issue to our
attention.
_______________________________________________________________________________

APPENDICES

A.  Patches listed in this bulletin are available to all Sun customers at:

    http://sunsolve.sun.com/securitypatch

B.  Checksums for the patches listed in this bulletin are available at:

    ftp://sunsolve.sun.com/pub/patches/CHECKSUMS

C.  Sun security bulletins are available at:

    http://sunsolve.sun.com/security

D.  Sun Security Coordination Team's PGP key is available at:

    http://sunsolve.sun.com/pgpkey.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-alert@sun.com

F.  To receive information or subscribe to our CWS (Customer Warning System)
    mailing list, send email to:

        security-alert@sun.com

    with a subject line (not body) containing one of the following commands:

        Command         Information Returned/Action Taken
        _______         _________________________________

        help            An explanation of how to get information

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                        following in the subject line (not body):

                                send #138

        subscribe       Sender is added to our mailing list.  To subscribe,
                        supply the following in the subject line (not body):

                                subscribe cws your-email-address

                        Note that your-email-address should be substituted
                        by your email address.

        unsubscribe     Sender is removed from the CWS mailing list.
________________________________________________________________________________

Copyright 2002 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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