Vulnerability Note VU#371648

Apple Mac OS X ftpd may allow arbitrary users to determine account name validity

Original Release date: 30 Nov 2006 | Last revised: 30 Nov 2006


Apple Mac OS X ftpd may allow arbitrary users to determine account name validity. This vulnerability may reveal protected information or allow an attacker to cause a denial-of-service condition.


According to Apple Security Update 2006-007:

    When attempting to authenticate a valid user, the FTP server may crash during a failed login attempt. The crash does not occur when attempting to authenticate unknown users.


A remote, unauthenticated attacker may be able to determine protected information or cause a denial-of-service condition.


Apply Apple Updates
This issue is addressed by Apple Security Update 2006-007.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Apple Computer, Inc.Affected-29 Nov 2006
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



This issue was reported in Apple Security Update 2006-007. Apple credits Benjamin Williams of the University of Canterbury for reporting this issue.

This document was written by Chris Taschner.

Other Information

  • CVE IDs: CVE-2006-4403
  • Date Public: 28 Nov 2006
  • Date First Published: 30 Nov 2006
  • Date Last Updated: 30 Nov 2006
  • Severity Metric: 10.13
  • Document Revision: 8


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