Mac OS X CFNetwork Certificate Processing Bug Discloses Client Certificates to Remote Users
SecurityTracker Alert ID: 1020134|
SecurityTracker URL: http://securitytracker.com/id/1020134
(Links to External Site)
Date: May 29 2008
Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, User access via network|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): prior to 10.5.3|
A vulnerability was reported in Mac OS X CFNetwork. A remote user can obtain certificate information.|
A remote user can create specially crafted HTML that, when loaded by the target user with Safari, will cause the first client certificate in the keychain will be disclosed to the remote web server.
A remote user can create a web site that, when loaded by the target user, will obtain certificate information from the target user's browser.|
The vendor has issued a fix as part of Security Update 2008-003 and Mac OS X v10.5.3, available from the Software Update pane in System Preferences, or Apple's Software Downloads web site at:|
The Software Update utility will present the update that applies to your system configuration. Only one is needed, either Security Update 2008-003 or Mac OS X v10.5.3.
For Mac OS X v10.5.2
The download file is named: "MacOSXUpd10.5.3.dmg"
Its SHA-1 digest is: 017ef905e5653b04e2455da261e804a72bf40139
For Mac OS X v10.5 - v10.5.1
The download file is named: "MacOSXUpdCombo10.5.3.dmg"
Its SHA-1 digest is: 69acd7399de25f1548675d660fdf24eb401e3de3
For Mac OS X Server v10.5.2
The download file is named: "MacOSXServerUpd10.5.3.dmg"
Its SHA-1 digest is: 336c9dceca724eab0b8c9db3943be3f9ecf244a4
For Mac OS X Server v10.5 - v10.5.1
The download file is named: "MacOSXServerUpdCombo10.5.3.dmg"
Its SHA-1 digest is: fdb2187d19ce21caecd3c3ba6b6fa6f65c9c3a4f
For Mac OS X v10.4.11 (Intel)
The download file is named: "SecUpd2008-003Intel.dmg"
Its SHA-1 digest is: 8f84d2f757c2fb277b139f72ef501dc894620e97
For Mac OS X v10.4.11 (PowerPC)
The download file is named: "SecUpd2008-003PPC.dmg"
Its SHA-1 digest is: 51e98d988c5bb09d4b1052199d90a9d65af7c8e7
For Mac OS X Server v10.4.11 (Universal)
The download file is named: "SecUpdSrvr2008-003Univ.dmg"
Its SHA-1 digest is: 337a05956b5a6e962b286a91beee9eb217a0175c
For Mac OS X Server v10.4.11 (PowerPC)
The download file is named: "SecUpdSrvr2008-003PPC.dmg"
Its SHA-1 digest is: 94cab2b4e5d26a284c5d91d0fe4dc20b4e9cfc97
The vendor's advisory is available at:
Vendor URL: support.apple.com/kb/HT1897 (Links to External Site)
Access control error|
Source Message Contents
Date: Wed, 28 May 2008 15:59:23 -0700|
Subject: APPLE-SA-2008-05-28 Security Update 2008-003 and Mac OS X v10.5.3
Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11,
Mac OS X v10.5 through v10.5.2, Mac OS X Server v10.5 through v10.5.2
Impact: Visiting a maliciously crafted website may lead to the
disclosure of sensitive information
Description: An information disclosure issue exists in Safari's SSL
client certificate handling. When a web server issues a client
certificate request, the first client certificate found in the
keychain is automatically sent, which may lead to the disclosure of
the information contained in the certificate. This update addresses
the issue by prompting the user before sending the certificate.