Invalid certificate warnings behind corporate proxy since 10.7.4

Number:rdar://11444256 Date Originated:10 March 2012
Status:Open Resolved:No
Product:Mac OS X Product Version:10.7.4
Classification:Bug Reproducible:Yes
[ Marked as a duplicate of rdar://11232763 (Open) by Apple. ]

When an HTTP connection is made SSL with e.g. Safari behind a corporate SSL proxy with its own certificate, the actual server certificates are marked as having an invalid issuer.
I have tried with a fresh keychain for my user, and by removing crlcache.db and ocspcache.db as mentioned here:

• Steps to Reproduce:
Configure an SSL proxy via Network in System Preferences (at work we use a Cisco proxy: "Application and Content Networking System Software 5.5.5").
Open safari and go to

• Expected Results:
No sheet window, secure connection is made and Safari marks it as such.

• Actual Results:
Sheet window: see attached files.
When I go to I get the 'invalid certificate' sheet: the issuer certifcate 'Thawte SGC CA' is marked as valid, but for the certificate '' it says: 'This certificate has an invalid issuer'.

• Regression:
New bug since 10.7.4.


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