Cisco Security Advisory: Cisco Unity Integrated with Exchange Has Default Passwords

From: Cisco Systems Product Security Incident Response Team (psirt_at_cisco.com)
Date: 12/15/04

  • Next message: advisory_at_stgsecurity.com: "STG Security Advisory: [SSA-20041215-15] Vulnerability of uploading files with multiple extensions in MoniWiki"
    To: bugtraq@securityfocus.com
    Date: Wed, 15 Dec 2004 11:45:00 -0500 
    
    

    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1

    =================================================================
    Cisco Security Advisory: Cisco Unity Integrated with Exchange Has
    Default Passwords
    =================================================================

    Revision 1.0: FINAL

    For Public Release 2004 December 15 1600 UTC (GMT)

    +----------------------------------------------------------------------

    Contents
    ========

        Summary
        Affected Products
        Details
        Impact
        Software Versions and Fixes
        Obtaining Fixed Software
        Workarounds
        Exploitation and Public Announcements
        Status of This Notice: FINAL
        Distribution
        Revision History
        Cisco Security Procedures

    +----------------------------------------------------------------------

    Summary
    =======

    Several default username/password combinations are present in all
    available releases of Cisco Unity when integrated with Microsoft
    Exchange. The accounts include a privileged administrative account, as
    well as several messaging accounts used for integration with other
    systems. An unauthorized user may be able to use these default accounts
    to read incoming and outgoing messages, and perform administrative
    functions on the Unity system.

    This vulnerability is documented in the Cisco Bug Toolkit as Bug ID
    CSCeg08552

    This advisory is available at
    http://www.cisco.com/warp/public/707/cisco-sa-20041215-unity.shtml

    Affected Products
    =================

    Vulnerable Products
    +------------------

    Cisco Unity versions 2.x, 3.x, and 4.x when integrated with Microsoft
    Exchange.

    Products Confirmed Not Vulnerable
    +--------------------------------

    The following products are confirmed not vulnerable:

      * Any version of Cisco Unity when integrated with Lotus Notes
      * Cisco Unity Express
      * Cisco CallManager and CallManager Express
      * Cisco MeetingPlace

    No other Cisco products are currently known to create these specific
    default account/passwords.

    Details
    =======

    Cisco Unity is a communications solution which delivers unified
    messaging (e-mail, voice, and fax messages sent to one inbox) and
    intelligent voice messaging. Cisco Unity integrates with desktop
    applications such as Microsoft Outlook and Lotus Notes.

    Several default username/password combinations are present in all
    releases Cisco Unity when integrated with Microsoft Exchange.

    An unauthorized user may be able to use these default accounts to read
    incoming and outgoing messages, or to perform administrative functions
    on the Unity system.

    The specified accounts with default passwords are:

    EAdmin<systemid>
    UNITY_<servername>
    UAMIS_<servername>
    UOMNI_<servername>
    UVPIM_<servername>
    ESubsubscriber

    This vulnerability is documented in the Cisco Bug Toolkit as Bug ID
    CSCeg08552

    Impact
    ======

    An unauthorized user may utilize EAdmin<systemid> to access the Cisco
    Unity Administrator in order to create, edit, or delete classes of
    service, restriction tables, call routing tables, call handlers,
    schedules and holidays, subscribers, public distribution lists, or to
    perform other administrative functions.

    An unauthorized user may utilize UNITY_<servername>, UAMIS_<servername>,
    UOMNI_<servername>, or UVPIM_<servername> to read
    incoming and outgoing messages as they are passed to and from external
    voicemail systems. Please note that local messages which do not pass to
    non-Unity voicemail systems are not made visible by this vulnerability.

    ESubscriber is an example user account that conveys no administrative
    or other special abilities. However it is contrary to best security
    practices to have unused accounts with default passwords.

    Software Versions and Fixes
    ===========================

    Cisco Unity 4.0(5), which is scheduled for released in the first
    quarter of the calendar year 2005, will contain the fix for this issue
    for NEW INSTALLS ONLY.

    Note: An upgrade to Cisco Unity 4.0(5) from any previous version will
    still contain this vulnerability. Customers upgrading to version 4.0(5)
    from any previous version must apply the workaround listed below to
    eliminate the vulnerability.

    Obtaining Fixed Software
    ========================

    As the fix for this vulnerability is a default configuration change,
    and a workaround is available, a software upgrade is not required to
    address this vulnerability. However, if you have a service contract,
    and wish to upgrade to unaffected code, you may obtain upgraded
    software through your regular update channels once that software is
    available. For most customers, this means that upgrades should be
    obtained through the Software Center on Cisco's Worldwide Web site at
    http://www.cisco.com/

    If you need assistance with the implementation of the workarounds, or
    have questions on the workarounds, please contact the Cisco Technical
    Assistance Center (TAC).

      * +1 800 553 2447 (toll free from within North America)
      * +1 408 526 7209 (toll call from anywhere in the world)
      * e-mail: tac@cisco.com

    See http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml for
    additional TAC contact information, including special localized
    telephone numbers and instructions and e-mail addresses for use in
    various languages.

    Customers may only install and expect support for the feature sets they
    have purchased. By installing, downloading, accessing or otherwise
    using such software upgrades, customers agree to be bound by the terms
    of Cisco's software license terms found at
    http://www.cisco.com/public/sw-license-agreement.html,
    or as otherwise set forth at Cisco.com
    Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml

    Workarounds
    ===========

    It is recommended to change to a strong password for all accounts
    created by Cisco Unity.

    The accounts that are created automatically when Cisco Unity is
    integrated with Microsoft Exchange are: (replacing <servername> with
    that of the particular Unity server, and <systemid> with that of your
    particular system id)

    EAdmin<systemid>
    Unity_<servername>
    UAMIS_<servername>
    UOMNI_<servername>
    UVPIM_<servername>
    ESubscriber

    Note: Please note that the account ESubscriber is only created during
    installation of versions PRIOR to version 4.0(3). If your initial
    installation of Unity was 4.0(3) or later, Esubscriber will not be
    present.

    See
    http://cisco.com/en/US/products/sw/voicesw/ps2237/products_tech_note09186a0080093f54.shtml
    for additional information on how to change account passwords.

    For guidance on strong passwords, please refer to your security policy.

    The CERT Coordination Center also has suggestions on strong password
    policy at
    http://www.cert.org/tech_tips/unix_configuration_guidelines.html#A

    Optionally, a customer may disable (but not delete), these specific
    accounts for extra security. Beginning with version 4.0(5) of Cisco
    Unity, these specific accounts will be created in a disabled state. For
    additional instructions on how to disable these accounts, please see
    http://www.microsoft.com/windows2000/en/advanced/help/default.asp?url=/windows2000/en/advanced/help/dsadmin_disable_andenable_accounts.htm

    With the exception of ESubscriber, it is important to NOT delete any of
    the accounts listed above. Deletion of EAdmin<systemid>, Unity_<servername>,
    UAMIS_<servername>, UOMIN_<server>, or UPVIM_<servername> will have an
    adverse affect on Cisco Unity operation.

    No interruption of service, nor restart of Cisco Unity is required to
    apply this workarouund.

    Exploitation and Public Announcements
    =====================================

    The Cisco PSIRT is not aware of any public announcements or malicious
    use of the vulnerability described in this advisory.

    This vulnerability was discovered during internal Cisco security
    review.

    Status of This Notice: FINAL
    ============================

    THIS ADVISORY IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
    KIND OF GUARANTEE OR WARRANTY. YOUR USE OF THE INFORMATION ON THE
    ADVISORY OR MATERIALS LINKED FROM THE ADVISORY IS AT YOUR OWN RISK.
    CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS NOTICE AT ANY TIME.

    Distribution
    ============

    This advisory will be posted on Cisco's worldwide website at
    http://www.cisco.com/warp/public/707/cisco-sa-20041215-unity.shtml

    In addition to worldwide web posting, a text version of this notice is
    clear-signed with the Cisco PSIRT PGP key and is posted to the
    following e-mail and Usenet news recipients.

      * cust-security-announce@cisco.com
      * first-teams@first.org (includes CERT/CC)
      * bugtraq@securityfocus.com
      * vulnwatch@vulnwatch.org
      * cisco@spot.colorado.edu
      * cisco-nsp@puck.nether.net
      * full-disclosure@lists.netsys.com
      * comp.dcom.sys.cisco@newsgate.cisco.com

    Future updates of this advisory, if any, will be placed on Cisco's
    worldwide website, but may or may not be actively announced on mailing
    lists or newsgroups. Users concerned about this problem are encouraged
    to check the above URL for any updates.

    Revision History
    ================

    +----------------------------------------+
    | Revision | | Initial |
    | 1.0 | 2004-December-15 | public |
    | | | release. |
    +----------------------------------------+

    Cisco Security Procedures
    =========================

    Complete information on reporting security vulnerabilities in Cisco
    products, obtaining assistance with security incidents, and registering
    to receive security information from Cisco, is available on Cisco's
    worldwide website at
    http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html.
    This includes instructions for press inquiries regarding Cisco security
    notices. All Cisco security advisories are available at
    http://www.cisco.com/go/psirt.

    +----------------------------------------------------------------------
    -----BEGIN PGP SIGNATURE-----
    Version: GnuPG v1.2.3 (SunOS)

    iD8DBQFBwHQsezGozzK2tZARAigAAKD8pWNdDUUoqSWRng3Enbx3iWa/NACgvoVZ
    6ocoHWF8pvKgoS4bXQDL4IU=
    =RlrU
    -----END PGP SIGNATURE-----


  • Next message: advisory_at_stgsecurity.com: "STG Security Advisory: [SSA-20041215-15] Vulnerability of uploading files with multiple extensions in MoniWiki"

    Relevant Pages