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Category:   Application (Generic)  >   SNMP Daemon Vendors:   HPE
(HP Issues Fix for HP/UX OS and Workarounds for Other HP Products) Many Simple Network Management Protocol (SNMP) Implementations Allow Remote Users to Deny Service or Obtain Access to the System
SecurityTracker Alert ID:  1003536
SecurityTracker URL:  http://securitytracker.com/id/1003536
CVE Reference:   CVE-2002-0012, CVE-2002-0013   (Links to External Site)
Date:  Feb 13 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 for HP/UX and workarounds for some other products.

For HP-UX Systems running snmpd or OPENVIEW, the following patches are available now:

PHSS_26137 s700_800 HP-UX 10.20 OV EMANATE14.2 Agent$
PHSS_26138 s700_800 HP-UX 11.X OV EMANATE14.2 Agent$
PSOV_03087 Solaris 2.X EMANATE Release 14.2 $

All three patches are available from:

http://support.openview.hp.com/cpe/patches/

In addition PHSS_26137 and PHSS_26138 will soon be available from:

http://itrc.hp.com

NOTE: The patches are labeled OV (Open View). However, the patches are also applicable to systems that are _NOT_ running Open View.

A workaround for HP-UX Systems is provided:

If a patch is not available for your platform or you cannot install an available patch, snmpd and snmpdm can be disabled by removing their entries from /etc/services and removing the execute permissions from /usr/sbin/snmpd and /usr/sbin/snmpdm.


For hp procurve switch 2524:

There is no known workaround. Patches are in process.


For NNM (Network Node Manager):

Disable snmpd and snmpdm as detailed for HP-UX above. Patches are in process.


For MC/ServiceGuard or ServiceGuard OPS Edition clusters:

If SNMP is disabled on nodes running in MC/ServiceGuard or ServiceGuard OPS Edition clusters, it will no longer be possible for cluster monitoring applications that use the cluster SNMP MIB to obtain the correct status for the cluster.

Examples of such applications are ClusterView, ClusterView Plus or EMS High Availability Monitors, which all receive cluster-related SNMP information from the cluster nodes.

This means that these applications will no longer display the correct status for the cluster, including the cluster starting or halting, nodes leaving or joining the cluster, and application packages starting up or halting in the cluster.

NOTE: All supported versions of MC/ServiceGuard as well as ServiceGuard OPS Edition are affected by this issue.

The ServiceGuard Manager product does not use the cluster SNMP MIB, and therefore is _NOT_ affected by the disabling of SNMP on cluster nodes.


For Event Monitoring System (EMS):

It should also be noted that if an MC/ServiceGuard or ServiceGuard OPS Edition application package has package resources defined that use EMS High Availability Monitors, then those package resources will no longer contain the current status for the cluster. It may be necessary to remove the definition for these package resources in order to allow continued operation of the package after SNMP has been disabled.


For JetDirect Firmware (older versions only):

Update firmware to X.08.32(or higher) or X.21.00(or higher) as applicable.

Vendor URL:  www.hp.com/ (Links to External Site)
Cause:   Access control error, Boundary error, Input validation error
Underlying OS:  UNIX (HP/UX)

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:  HP-UX security bulletins digest



Document ID:  HPSBUX0202-184
Date Loaded:  20020212
      Title:  Sec. Vulnerability in SNMP

-----------------------------------------------------------------
     HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #0184,
     Originally issued: 12 Feb. 2002
 -----------------------------------------------------------------

The information in the following Security Bulletin should be acted
upon as soon as possible.  Hewlett-Packard Company will not be
liable for any consequences to any customer resulting from customer's
failure to fully implement instructions in this Security Bulletin as
soon as possible.

 ------------------------------------------------------------------
PROBLEM:  Vulnerabilities in SNMP request and trap handling.

PLATFORM: HP 9000 Series 700 and Series 800 running HP-UX
          releases 10.X and 11.X

          hp procurve switch 2524

          JetDirect Firmware (older versions only)

DAMAGE:   Possible denial-of-service, service interruptions,
          unauthorized access.

SOLUTION: Apply patches or implement workarounds.
         For HP-UX releases:
        PHSS_26137    s700_800  HP-UX 10.20 OV EMANATE14.2 Agent
        PHSS_26138    s700_800  HP-UX 11.X  OV EMANATE14.2 Agent
        PSOV_03087    Solaris 2.X      EMANATE Release 14.2

MANUAL ACTIONS: Upgrade or workaround action per below.

AVAILABILITY:  Patches for some affected systems are available now.

 ------------------------------------------------------------------

 A. Background
    CERT has issued an advisory:
    CERT Advisory CA-2002-03 Multiple Vulnerabilities in Many
    Implementations of the Simple Network Management Protocol
    (SNMPv1) containing information about the vulnerabilities.

    Hewlett-Packard Company will revise this bulletin as new
    information becomes available.

    ---------------------------------------------------------
    hp procurve switch 2524
    ---------------------------------------------------------
    hp procurve switch 2525 (product J4813A) is vulnerable to
    some issues.  Patches in process.

    ---------------------------------------------------------
    NNM  (Network Node Manager)
    ---------------------------------------------------------
    Some problems were found in NNM product were related to
    trap handling. Patches in process.

    ---------------------------------------------------------
    JetDirect Firmware (older versions only)
    ---------------------------------------------------------
    ONLY some older versions of JetDirect Firmware are
    vulnerable to some of the issues.  The older firmware
    can be upgraded in most cases, see list below.

    JetDirect Firmware Version      State
     ==========================     =====

            X.08.32 and higher      NOT Vulnerable
            X.21.00 and higher      NOT Vulnerable
        where X represents an alpha character for your device.

    JetDirect Product Numbers that can be freely upgraded
    to X.08.32 or X.21.00 or higher firmware.

    EIO (Peripherals Laserjet 4000, 5000, 8000, etc...)
    J3110A 10T
    J3111A 10T/10B2/LocalTalk
    J3112A Token Ring (discontinued)
    J3113A 10/100 (discontinued)
    J4169A 10/100
    J4167A Token Ring

    MIO (Peripherals LaserJet 4, 4si, 5si, etc...)
    J2550A/B 10T (discontinued)
    J2552A/B 10T/10Base2/LocalTalk (discontinued)
    J2555A/B Token Ring (discontinued)
    J4100A 10/100
    J4105A Token Ring
    J4106A 10T

    External Print Servers
    J2591A EX+ (discontinued)
    J2593A EX+3 10T/10B2 (discontinued)
    J2594A EX+3 Token Ring (discontinued)
    J3263A 300X 10/100
    J3264A 500X Token Ring
    J3265A 500X 10/100

     ----------------------------------------------------------
     HP-UX Systems running snmpd or OPENVIEW
     ----------------------------------------------------------
     Any HP-UX 10.X or 11.X system running snmpd or snmpdm is
     vulnerable.  To determine if your HP-UX system has snmpd
     or snmpdm installed:

       swlist -l file | grep snmpd

B. Fixing the problem
   Install the appropriate patch or firmware revision or work
   around problem as detailed below.

C. Recommended solution
    ---------------------------------------------------------
    hp procurve switch 2524
    ---------------------------------------------------------
    No known workaround.  Patches are in process.

    ---------------------------------------------------------
    NNM  (Network Node Manager)
    ---------------------------------------------------------
    Disable snmpd and snmpdm as detailed for HP-UX below.
    Patches are in process.

    ---------------------------------------------------------
    MC/ServiceGuard
    ---------------------------------------------------------
    Concerning the impact of disabling the SNMP agent on nodes
    in MC/ServiceGuard or ServiceGuard OPS Edition clusters:

    If SNMP is disabled on nodes running in MC/ServiceGuard
    or ServiceGuard OPS Edition clusters, it will no longer be
    possible for cluster monitoring applications that use the
    cluster SNMP MIB to obtain the correct status for the cluster.

    Examples of such applications are ClusterView, ClusterView Plus
    or EMS High Availability Monitors, which all receive
    cluster-related SNMP information from the cluster nodes.

    This means that these applications will no longer display the
    correct status for the cluster, including the cluster starting
    or halting, nodes leaving or joining the cluster, and application
    packages starting up or halting in the cluster.

      NOTE:  All supported versions of MC/ServiceGuard as well as
             ServiceGuard OPS Edition are affected by this issue.

             The ServiceGuard Manager product does not use the cluster
             SNMP MIB, and therefore is _NOT_ affected by the
             disabling of SNMP on cluster nodes.

    ---------------------------------------------------------
    Event Monitoring System  (EMS)
    ---------------------------------------------------------
    It should also be noted that if an MC/ServiceGuard or ServiceGuard
    OPS Edition application package has package resources defined
    that use EMS High Availability Monitors, then those package
    resources will no longer contain the current status for the
    cluster.  It may be necessary to remove the definition for these
    package resources in order to allow continued operation of the
    package after SNMP has been disabled.

    ---------------------------------------------------------
    JetDirect Firmware (older versions only)
    ---------------------------------------------------------
    Update firmware to X.08.32(or higher) or  X.21.00(or higher)
    as applicable.

    ----------------------------------------------------------
    HP-UX Systems running snmpd or OPENVIEW
    ----------------------------------------------------------
    The following patches are available now:

     PHSS_26137    s700_800  HP-UX 10.20 OV EMANATE14.2 Agent$
     PHSS_26138    s700_800  HP-UX 11.X  OV EMANATE14.2 Agent$
     PSOV_03087    Solaris 2.X      EMANATE Release 14.2 $

    All three patches are available from:

     http://support.openview.hp.com/cpe/patches/

    In addition PHSS_26137 and PHSS_26138 will soon be available
    from:

     http://itrc.hp.com

  ============================================================
   NOTE: The patches are labeled OV (Open View).  However, the
   patches are also applicable to systems that are _NOT_
   running Open View.
  ============================================================

    Workaround for HP-UX Systems:

    If a patch is not available for your platform or you cannot
    install an available patch, snmpd and snmpdm can be disabled
    by removing their entries from /etc/services and removing the
    execute permissions from /usr/sbin/snmpd and /usr/sbin/snmpdm.


D. To subscribe to automatically receive future NEW HP Security
   Bulletins from the HP IT Resource Center via electronic
   mail, do the following:

   Use your browser to get to the HP IT Resource Center page
   at:

       http://itrc.hp.com

   Use the 'Login' tab at the left side of the screen to login
   using your ID and password.  Use your existing login or the
   "Register" button at the left to create a login, in order to
   gain access to many areas of the ITRC.  Remember to save the
   User ID assigned to you, and your password.

   In the left most frame select "Maintenance and Support".

   Under the "Notifications" section (near the bottom of
   the page), select "Support Information Digests".

   To -subscribe- to future HP Security Bulletins or other
   Technical Digests, click the check box (in the left column)
   for the appropriate digest and then click the "Update
   Subscriptions" button at the bottom of the page.

    or

    To -review- bulletins already released, select the link
    (in the middle column) "Search Technical Knowledge
    Database".

    To -gain access- to the Security Patch Matrix, or the
    "The Security Bulletins Archive" select the link for
    "The Security Bulletins Archive" (near the bottom of
    the page).  Once in the archive the third link is
    to the current Security Patch Matrix. Updated daily, this
    matrix categorizes security patches by platform/OS release,
    and by bulletin topic.  Security Patch Check completely
    automates the process of reviewing the patch matrix for
    11.XX systems.

    For information on the Security Patch Check tool, see:
    http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
    displayProductInfo.pl?productNumber=B6834AA"

    The security patch matrix is also available via anonymous
    ftp:

    ftp.itrc.hp.com:~ftp/export/patches/hp-ux_patch_matrix

    On the "Support Information Digest Main" page:
    click on the "HP Security Bulletin Archive".


E. To report new security vulnerabilities, send email to

    security-alert@hp.com

   Please encrypt any exploit information using the
   security-alert PGP key, available from your local key
   server, or by sending a message with a -subject- (not body)
   of 'get key' (no quotes) to security-alert@hp.com.

   Permission is granted for copying and circulating this
   Bulletin to Hewlett-Packard (HP) customers (or the Internet
   community) for the purpose of alerting them to problems,
   if and only if, the Bulletin is not edited or changed in
   any way, is attributed to HP, and provided such reproduction
   and/or distribution is performed for non-commercial purposes.

   Any other use of this information is prohibited. HP is not
   liable for any misuse of this information by any third party.
 ________________________________________________________________
-----End of Document ID:  HPSBUX0202-184--------------------------------------

 
 


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