Apple Mac OS X Security Framework Secure Transport may not negotiate the best cipher available

Overview

Apple Mac OS X Security Framework Secure Transport may not negotiate the best cipher available. This vulnerability may allow traffic to be weakly encrypted.

Description

Secure Transport refers to Apple’s implementation of SSL and TLS that is used by Mac OS X to create secure connections over TCP/IP connections. According to Apple Security Update 2006-007:

_Due to the order they are evaluated, it is possible for Secure Transport to use a cipher that provides no encryption or authentication when better ciphers are available. _Applications using Secure Transport through CFNetwork, such as Safari, are not affected by this issue on systems with Security Update 2006-006 or later. This issue does not affect systems using Mac OS X v10.4.8 and later

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Impact

A remote, unauthenticated attacker may be able to observe the plaintext of traffic believed to be securely encrypted.

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Solution

Apply Apple Updates

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

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Vendor Information

734032

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Apple Computer, Inc. __ Affected

Updated: November 29, 2006

Status

Affected

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.

Addendum

Refer to Apple Security Update 2006-007.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23734032 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://docs.info.apple.com/article.html?artnum=304829&gt;
• <http://secunia.com/advisories/23155/&gt;

Acknowledgements

This issue was reported in Apple Security Update 2006-007. Apple credits Eric Cronin of gizmolabs for reporting this issue.

This document was written by Chris Taschner.

Other Information

CVE IDs:	CVE-2006-4407
Severity Metric:	10.94 Date Public: