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.

Updated: November 29, 2006


__ Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

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

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


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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: | 8