Vulnerability Note VU#811384

Apple Mac OS X Security Framework Online Certificate Status Protocol (OCSP) service fails to properly retrieve certificate revocation lists

Overview

Apple Mac OS X Security Framework Online Certificate Status Protocol (OCSP) service is unable to retrieve certificate revocation lists on systems that are configured to use an HTTP proxy. This vulnerability may result in the use of revoked certificates.

I. Description

The Online Certificate Status Protocol (OCSP) is used to obtain the status of X.509 digital certificates. According to Apple Security Update 2006-007:

On systems that are configured to use an HTTP proxy, the Online Certificate Status Protocol (OCSP) service is unable to retrieve certificate revocation lists. This update addresses this issue by using the system proxy settings in ocpsd.

II. Impact

This vulnerability may result in the use of revoked certificates. The full impact of this vulnerability depends on the application verifying the certificate.

III. Solution

Apply Apple Updates

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

Systems Affected

Vendor	Status	Date Notified	Date Updated
Apple Computer, Inc.	Vulnerable	1-Dec-2006

References

http://docs.info.apple.com/article.html?artnum=304829
http://secunia.com/advisories/23155/

Credit

This issue was reported in Apple Security Update 2006-007. Apple credits Timothy J. Miller of the MITRE Corporation for reporting this issue.

This document was written by Chris Taschner.

Other Information

Date Public:	2006-11-28
Date First Published:	2006-12-04
Date Last Updated:	2006-12-04
CERT Advisory:
CVE-ID(s):	CVE-2006-4409
NVD-ID(s):	CVE-2006-4409
US-CERT Technical Alerts:
Metric:	0.22
Document Revision:	10

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Produced 2006 by US-CERT, a government organization
Disclaimers and copyright information

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