Cisco Security Advisory-
Several default username/password combinations are present in all available releases of Cisco Unity when integrated with Microsoft Exchange. The accounts include a priviledged 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 ( registered customers only)
This advisory is posted at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20041215-unity.
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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.
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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>
- ESubscriber
This vulnerability is documented in the Cisco Bug Toolkit as Bug ID CSCeg08552 ( registered customers only)
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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://www.cisco.com/en/US/customer/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.
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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.
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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.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessRevision 1.1
2004-December-17
Minor typographical corrections.
Revision 1.0
2004-December-15
Initial public release.
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