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

ID VU:371648
Type cert
Reporter CERT
Modified 2006-11-30T15:49:00



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.

Vendor Information


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Apple Computer, Inc. __ Affected

Updated: November 29, 2006



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


Refer to Apple Security Update 2006-007.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

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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
Severity Metric: | 10.13
Date Public: | 2006-11-28
Date First Published: | 2006-11-30
Date Last Updated: | 2006-11-30 15:49 UTC
Document Revision: | 9