Compaq Computer Corporation Information for VU#854306

Multiple vulnerabilities in SNMPv1 request handling

Status

Affected

Vendor Statement

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      TITLE: (SSRT0779) Potential Security Vulnerabilities in SNMP
      Posted at http://ftp.support.compaq.com/patches/.new/security.shtml

      NOTICE: There are no restrictions for distribution of this
      Bulletin provided that it remains complete and intact.

      RELEASE DATE:   18 FEBRUARY, 2002

          UPDATED:   03 APRIL,    2002 - update Tru64, patch availability
                     08 MARCH,    2002 - add StorageWorks products, and
                                         Compaq/Microcom based products.
                     05 MARCH,    2002 - update TRU64 Information

      SEVERITY: MEDIUM

      SOURCE:  Compaq Computer Corporation
              Compaq Global Services
              Software Security Response Team

      CROSS REFERENCE:   (SSRT0799, CAN-2002-0012,
                         CAN-2002-0013, CERT CA-2002-03)

      PROBLEM SUMMARY:

      The Computer Emergency Response Team (CERT/cc) has recently issued an
      advisory regarding numerous potential vulnerabilities in SNMPv1
      implementations. These potential vulnerabilities are applicable to
      SNMPv1 trap handling and SNMPv1 Request handling. The CERT article
      outlines vulnerabilities that can cause SNMP services to stop
      functioning and in some cases may enable "unauthorized access,"
      "denial of service attacks" or may cause system instability.

      IMPACT:
      Compaq NonStop Himalaya Servers:
      Compaq TCP/IP Services for OpenVMS:
      Compaq Tru64 UNIX:
      Compaq Insight Management Suite:
      Compaq Deskpro, Professional Workstation, Armada, Evo:
      Compaq SANworks Hardware:
      Compaq StorageWorks Products
      Compaq/Microcom Products:

      Compaq's findings to date regarding the SNMPv1 issues are as
      follows:

      ________________________________
      Compaq NonStop Himalaya Servers:

      The Compaq Himalaya NonStop Kernel prohibits execution of code on the
      stack or heap by hardware TLB permissions (read/write only),
      preventing Trojan horse attacks by embedding code within the buffer
      overflow area. However, process ABENDs can occur.

      The SNMP agent ABENDs in the c06-snmpv1 buffer-overflow tests.
      This affects forwarding trap messages and/or sending info responses
      to SNMP managers.

      Sub-agents use IPCs to communicate with the SNMP agent, so they
      cannot be directly attacked.  More importantly, sub-agents are
      confined to information only requests, so they cannot be used to
      configure/manage their sub-systems. Our investigation an analysis is
      continuing and further updates will be provided.

      IPMs to address the ABEND problem of the SNMP are in development and
      will be released as soon as verification is complete. Availability of
      these IPMs will be announced in future updates. The exposure to
      SNMP agent ABENDs can be reduced by running the SNMP agent as a
      process-pair or by configuring auto-restart in the Persistence
      Manager.

      __________________________________
      Compaq TCP/IP Services for OpenVMS:

      There is some impact to the SNMP agent provided with Compaq TCP/IP
      Services for OpenVMS. This problem can cause the SNMP agent to ACCVIO
      and terminate temporarily denying service to SNMP, but in most cases
      after this occurs Compaq TCP/IP Services for OpenVMS will restart
      the SNMP agent in response to the next SNMP request. There are no
      known risks of compromising system security due to this problem.
      The SNMP agent executes from a non-privileged process, which
      prevents any compromise to system security.

      Our investigation and analysis has determined the cause of the
      problem. The updated images for Compaq TCP/IP Services for OpenVMS
      are now in final test. Compaq will provide updates to Compaq TCP/IP
      Services for OpenVMS in the next ECO and also in the next release,
      Compaq TCP/IP Services for OpenVMS V5.3. Contact Compaq's Customer
      Support Center if an earlier updated is required.

      __________________
      Compaq Tru64 UNIX:

      UPDATE: 02 April, 2002

      There is no known risk of compromising Tru64 UNIX system security
      due to the recent SNMP attack.  The SNMP agent provided with
      Tru64 UNIX is susceptible to a limited problem - the SNMP
      agent may stop responding to SNMP requests, or it may incur a
      segmentation fault, generate a core file, and exit. Either scenario
      denies SNMP service to SNMP-based network management applications.
      However,  we have not found the attack to cause the system to be
      unstable, vulnerable to "unauthorized access",  or subject to any
      denial of service other than to the SNMP service.

      Impacted Tru64 UNIX operating system versions include:
      Tru64 UNIX 4.0f, 4.0g, 5.0a, 5.1, 5.1a.

      SOLUTION:

        Until the Tru64 UNIX fixes are available in the mainstream release
        patch kits, Compaq is releasing the following Early Release Patch
        Kit(s) (ERPs) publicly for use by any customer.

        The Early Release Patch kits use dupatch to install and will not
        install over any Customer-Specific-Patches (CSPs) which have file
        intersections with the ERPs. Raise an IPMT case to UNIX Support
        Engineering if you need a CSP merged with one of the following
      ERPs.

        The fixes contained in the Early Release Patch (ERP) kits will be
        available in the next mainstream patch kit(s) for:
             - Tru64 UNIX 4.0F PK8
             - Tru64 UNIX 4.0G PK4
             - Tru64 UNIX 5.0A PK4
             - Tru64 UNIX 5.1  PK5
             - Tru64 UNIX 5.1A PK2

        ---------------------
        Early Release Patches
        ---------------------

        Tru64 UNIX 4.0F
        PREREQUISITE:    Tru64 UNIX 4.0F with PK7 (BL18) installed
        ERP Kit Name:    DUV40FB18-C0071301-13866-ES-20020401
        Kit Location: http://ftp1.support.compaq.com/public/unix/v4.0f/


        Tru64 UNIX 4.0G
        PREREQUISITE:    Tru64 UNIX 4.0G with PK3 (BL17) installed
        ERP Kit Name:    T64V40GB17-C0012100-13640-ES-20020313
        Kit Location: http://ftp1.support.compaq.com/public/unix/v4.0g/


        Tru64 UNIX 5.0A
        PREREQUISITE:    Tru64 UNIX 5.0A with PK3 (BL17) installed
        ERP Kit Name:    T64V50AB17-C0019600-13593-ES-20020308
        Kit Location: http://ftp1.support.compaq.com/public/unix/v5.0a/


        Tru64 UNIX 5.1
        PREREQUISITE:    Tru64 UNIX 5.1 with PK4 (BL18) installed
        ERP Kit Name:    T64V51B18-C0109002-13712-ES-20020318
        Kit Location: http://ftp1.support.compaq.com/public/unix/v5.1/


        Tru64 UNIX 5.1A
        PREREQUISITE:    Tru64 UNIX 5.1A with PK1 (BL1) installed
        ERP Kit Name:    T64V51AB1-C0014802-13710-ES-20020318
        Kit Location: http://ftp1.support.compaq.com/public/unix/v5.1a/

        MD5 and SHA1 checksums are available in the public patch notice for
        the ERP kits. You can find information on how to verify MD5 and
        SHA1 checksums at:
             http://www.support.compaq.com/patches/whats-new.shtml

      ________________________________
      Compaq Insight Management Suite:

      (ProLiants running industry standard operating systems including
      Windows 2000, NetWare, Linux, etc)

      The Compaq Insight Management Suite utilizes SNMP as a primary
      communications method.  Fixes to the operating systems affected will
      be provided by the vendors involved.  Check
      http://www.compaq.com/manage/security the most up-to-date
      information.

      _______________________________________________
      Deskpro, Professional Workstation, Armada, Evo:

      The Deskpro, Professional Workstation, Armada, Evo(Microsoft
      operating systems including Windows XP, Windows 2000, Windows 98, and
      Windows 95) Compaq Management Agents for Clients utilizes SNMP as an
      optional communications method.

      Fixes to the operating systems affected
      will be provided by Microsoft.  Check
      www.microsoft.com/technet/security/bulletin/MS02-006.asp for the most
      up-to-date information.


      _____________________________________
      Compaq SANworks Management Appliance:

      The SANworks management appliance is essentially a Compaq server and
      our recommended configuration does not have it connected directly to
      the internet.  Therefore, it is less exposed than other servers to
      external SNMP security attacks.  However, the appliance is
      susceptible to SNMP security attacks from inside the firewall that
      could result in the graceful termination of some storage management
      applications on the appliance.

      Compaq will provide a patch to the appliance as soon as possible.

      _____________________________
      COMPAQ STORAGEWORKS PRODUCTS:

      UPDATE: 08 MARCH, 2002

      The following Compaq StorageWorks products have Ethernet
      connections that may potentially be exposed to the SNMPv1
      vulnerability:

      Compaq StorageWorks SAN Switch 8, 8-EL, 16, 16-EL, 2/16, Integrated
      32 or 64 Port
      Compaq StorageWorks SAN Director 64
      Compaq StorageWorks Modular Data Router
      Compaq StorageWorks 12 Port Fibre Channel Managed Hub
      Compaq StorageWorks 20/40 GB 8 Cassette AutoLoader


      RESOLUTION:
      Compaq StorageWorks SAN Switch 8, 8-EL,
      16, 16-EL, 2/16, Integrated 32 or 64 Port:
      There are currently no known issues related to vulnerability
      notes VU#854306 or VU#107186 with these products.
      They have passed all validation tests conducted to date.

      Compaq StorageWorks SAN Director 64:
      This product has been evaluated with a SNMP based test program that
      attempts to overload the director with SNMP traffic such as GET, Set
      and Get Next commands. No problems were found in this testing.
      Additionally, Compaq is in the process of evaluating the details of
      the SNMP implementation in this product. Any problems identified that
      are determined to pose a risk to customer operations will be
      documented and addressed in future maintenance releases. Note that
      the advisory documented two areas of vulnerability. One area involves
      Trap handling on the part of SNMP Management components, and the
      other area involves the processing of GET, Set and Get Next commands
      on the part of SNMP Agent components. The director implements only
      the SNMP Agent components, so none of the problems related to Trap
      handling apply. Also, the SNMP Agent on the director management
      server is disabled by default.  No SNMP messages are processed by
      the management server unless the systems administrator has explicitly
      enabled the SNMP Agent.  On the director itself, the SNMP Agent is
      enabled by default, but for read access only.

      Compaq StorageWorks Modular Data Router:
      The potential vulnerability has to do with SNMP Set commands.
      The only Set command the MDR allows is to set the trap address.

      Compaq StorageWorks 12 Port Fibre Channel Managed Hub:
      Compaq is in the process of evaluating the SNMP implementation
      in this product.

      Compaq StorageWorks 20/40 GB 8 Cassette AutoLoader:
      Compaq is in the process of evaluating the SNMP implementation
      in this product.

      ________________________
      COMPAQ/MICROCOM PRODUCTS:

      UPDATE: MARCH 08, 2002
      _________________________________________
      Microcom Access Integrator (All Versions)
      Compaq-Microcom 6000 Series Remote Access Concentrators(All Versions)

      Both products use SNMPv1 protocol as the transport for system
      management, either through expressWATCH, or third party SNMP clients.
      These products are normally managed over the LAN by clients using IP
      ports UDP 161 for SNMP and UDP 162 for SNMP Traps.  The SNMP agents
      integrated in these products cannot be disabled. Access to the system
      via the PRI, T1 or analog modules do not present a security risk
      related to SNMPv1.

      Incursions may result in instability of the system requiring a hard
      reset of one or more of the systems modules, which will result in
      temporary loss of connectivity to dial in clients. Users will be
      able to reconnect after the systems has reset.

      RECOMMENDATIONS:
      Compaq recommends the following precautions in accordance with good
      general networking administration practices.

      1. Apply perimeter filtering to SNMP traffic. Upstream
      internet routers, or Firewall should be configured to filter
      UDP ports 161 and 162.

      2. Compaq has always recommended that the associated
      engines contained in the CM6000 Series reside on an internal
      network using a non-routable private addressing scheme.

      3. The system should not be managed over the internet or
      an non secure LAN.

      ______________________________
      Microcom ISPorte (All Versions)
      Compaq Microcom 4000 concentrator

      These products make very limited use of the SNMPv1 protocol on
      the Ethernet portion of their PRI/T1 modules. In the limited
      number of installations where digital calls are being tunneled
      to NT servers on the connected LAN, there is a potential for
      SNMP packets to reach the PRI/T1 card through it's Ethernet
      port. Access to the system via the analog modem modules do
      not present security risk related to SNMPv1.

      Incursions may result in instability of the PRI/T1 card, resulting
      in a loss of connectivity for dial in users. A hard reset is the
      only way to correct these failure, but a hard reset will also
      disconnect all remaining users. Users will be able to reconnect
      after the system resets.

      RECOMMENDATIONS:
      Compaq recommends the following precautions in accordance with good
      general networking administration practices.

      1. Apply perimeter filtering to SNMP traffic. Upstream internet
      routers should be configured to filter UDP ports 161 and 162.

      2. If the system is being used for analog dial in access only,
      it should not be connected to the LAN via the Ethernet port on
      the PRI/T1 card.

      ___________________________
      Microcom SNMP HDMS+ System (Version 1.3.1)

      The great majority of HDMS+ systems installed do not have SNMP
      capabilities and are therefore not at risk. These systems can be
      identified by the absence of a 10baseT connector on the rear of the
      controller card.

      A limited number of SNMP HDMS+ systems were produced, this product
      uses SNMPv1 protocol as the transport for system management.
      Management clients can include either expressWATCH, or third party
      SNMP clients.

      The product can be managed over the LAN by clients using IP ports
      UDP 161 for SNMP and UDP 162 for SNMP Traps, or through a serial
      RS232 port using SLIP.  The SNMP agents integrated in these products
      cannot be disabled. Access to the system via the analog modem modules
      do not present security risk related to SNMPv1.

      Incursions may result in instability of the systems management
      controller, which may require a hard reset. The reset of this
      controller may result in a temporary loss of connectivity for
      dial in users. Dial in users will be able to reconnect after
      the system has reset.

      RECOMMENDATIONS:
      Compaq recommends the following precautions in accordance with good
      general networking administration practices.

      1. Apply perimeter filtering to SNMP traffic. Upstream
      internet routers or firewalls should be configured to filter
      UDP ports 161 and 162.

      2. The system should not be managed over the internet.

      3. The system should not be managed over a non secure LAN.
      Direct management via a serial RS232 SLIP connection would be
      recommended.

      For assistance or clarification on any of the recommendation for
      Compaq/Microcom products, please call 01-800-652-6672 and from
      the menu select 2,3,1 then enter routing code 1851

      ____________________________________________________________________




      NOTE:

      Many systems operate behind firewalls and would normally
      implement SNMP blocking for SNMP as standard procedure. Based on SNMP
      blocking and ingress/egress filtering, the potential Security
      vulnerability may only be exploited by users who have access to your
      local security domain, therefore the risk is diminished.


      SUPPORT:

      This advisory bulletin will be updated for the various
      products requiring patches and individual patch notifications
      will be done through standard "patch notification" procedures
      for those products. For further information, contact your normal
      Compaq Support channel.


      SUBSCRIBE:

      To subscribe to automatically receive future Security
      Advisories from the Compaq's Software Security Response Team via
      electronic mail:

      http://www.support.compaq.com/patches/mailing-list.shtml

      REPORT:

      To report a potential security vulnerability with any Compaq
      supported product, send email mailto:security-ssrt@compaq.com
      or mailto:sec-alert@compaq.com

      Compaq appreciates your cooperation and patience. As always,
      Compaq urges you to periodically review your system management
      and security procedures. Compaq will continue to review and
      enhance the security features of its products and work with
      our customers to maintain and improve the security and integrity
      of their systems.

      "Compaq is broadly distributing this Security Bulletin in order to
      bring to the attention of users of the affected Compaq products the
      important security information contained in this Bulletin.
      Compaq recommends that all users determine the applicability of
      this information to their individual situations and take appropriate
      action.  Compaq does not warrant that this information is necessarily
      accurate or complete for all user situations and, consequently,
      Compaq will not be responsible for any damages resulting from
      user's use or disregard of the information provided in this
      Bulletin."

      Copyright 2002 Compaq Information Technologies Group, L.P.
      Compaq shall not be liable for technical or editorial errors
      or omissions contained herein. The information in this document
      is subject to change without notice. Compaq and the names of
      Compaq products referenced herein are, either, trademarks
      and/or service marks or registered trademarks and/or service
      marks of Compaq Information Technologies Group, L.P. Other product
      and company names mentioned herein may be trademarks and/or service
      marks of their respective owners.

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References

None

Addendum

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