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Category:   Application (E-mail Server)  >   Cyrus IMAP Server Vendors:   Carnegie Mellon University
Cyrus IMAP Server May Let a Remote Authenticated User Access Another Mailbox When Using Kerberos
SecurityTracker Alert ID:  1012392
SecurityTracker URL:
CVE Reference:   CVE-2004-1089   (Links to External Site)
Date:  Dec 2 2004
Impact:   Disclosure of user information, Modification of user information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the Cyrus IMAP server when used with Kerberos authentication, affecting Mac OS X and possibly other operating systems. A remote authenticated user may be able to access another mailbox on the target system.

Apple reported that a remote authenticated user (authenticated using Kerberos) can gain access to other mailboxes by switching to the target mailbox after authentication.

Mac OS X Server v10.2.8 is not affected.

Apple credits with reporting this flaw.

Impact:   A remote authenticated user can access a target user's mailbox on the same server.
Solution:   For Mac OS X, Apple has issued a fix as part of Security Update 2004-12-02, available at:

- Software Update preferences

- Apple Downloads:

[Editor's note: It is not yet clear if this flaw affects any operating systems other than Mac OS X.]

Vendor URL: (Links to External Site)
Cause:   Access control error
Underlying OS:  UNIX (macOS/OS X)
Underlying OS Comments:  Mac OS X Server v10.3.6

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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