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Category:   Application (E-mail Server)  >   Postfix Vendors:
Postfix CRAM-MD5 Replay Attack May Let Remote Users Send Mail
SecurityTracker Alert ID:  1012395
SecurityTracker URL:
CVE Reference:   CVE-2004-1088   (Links to External Site)
Date:  Dec 2 2004
Impact:   Host/resource access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Postfix when using CRAM-MD5 authentication. A remote user may be able to send mail via the target system.

Apple reported that in some situations, a remote user may be able to replay previously recorded CRAM-MD5 authentication credentials during a small time period to send mail via the system.

Mac OS X v10.2.8 and Mac OS X Server v10.2.8 are not affected.

Apple credits Victor Duchovni of Morgan Stanley with reporting this flaw.

Impact:   A remote user may be able to send mail via the target system without properly authenticating.
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 operating systems other than Mac OS X.]

Vendor URL: (Links to External Site)
Cause:   Authentication 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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