Apple Safari WebKit Flaw Lets Remote Users Bypass Cross-Origin Resource Sharing Controls
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SecurityTracker Alert ID: 1023165 |
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SecurityTracker URL: http://securitytracker.com/id/1023165
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CVE Reference:
CVE-2009-2816
(Links to External Site)
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Date: Nov 12 2009
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Impact:
Disclosure of system information, Disclosure of user information, Modification of user information
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 4.0.4
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Description:
A vulnerability was reported in Apple Safari. A remote user can bypass cross-origin resource sharing controls.
A remote user can create specially crafted HTML that, when loaded by the target user, will cause the target user's browser to take actions on other web sites.
The vulnerability resides in WebKit.
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Impact:
A remote user can cause the target user's browser to take actions on other web sites.
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Solution:
The vendor has issued a fix (4.0.4), available via the Apple Software Update application, or Apple's Safari download site at:
http://www.apple.com/safari/download/
Safari for Mac OS X v10.6.1 and v10.6.2
The download file is named: Safari4.0.4SnowLeopard.dmg
Its SHA-1 digest is: 445df542b183fa65fd9df1f7ff4c6af306e6c0b9
Safari for Mac OS X v10.5.7
The download file is named: Safari4.0.4Leopard.dmg
Its SHA-1 digest is: 0aeb54208cdebcafb3206baf11d8649836273f33
Safari for Mac OS X v10.4.11
The download file is named: Safari4.0.4Tiger.dmg
Its SHA-1 digest is: 4ddfd70420e27bab98864a45f291f688d86f5963
Safari for Windows 7, Vista or XP
The download file is named: SafariSetup.exe
Its SHA-1 digest is: 236cfb9556dd369d95c5b45ddce740b15f2cb267
Safari+QuickTime for Windows 7, Vista or XP
The file is named: SafariQuickTimeSetup.exe
Its SHA-1 digest is: d95d61f2f804576b5d31fc8f47ac310438bc44dc
The vendor's advisory is available at:
http://support.apple.com/kb/HT3949
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Vendor URL: support.apple.com/kb/HT3949 (Links to External Site)
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Cause:
Access control error
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Underlying OS:
UNIX (OS X), Windows (7), Windows (Vista), Windows (XP)
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Message History:
None.
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Source Message Contents
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Date: Thu, 12 Nov 2009 03:11:35 +0000
Subject: Apple Safari
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APPLE-SA-2009-11-11-1 Safari 4.0.4
WebKit
CVE-ID: CVE-2009-2816
Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11,
Mac OS X v10.5.8, Mac OS X Server v10.5.8,
Mac OS X v10.6.1 and v10.6.2, Mac OS X Server v10.6.1 and v10.6.2,
Windows 7, Vista, XP
Impact: Visiting a maliciously crafted website may result in
unexpected actions on other websites
Description: An issue exists in WebKit's implementation of Cross-
Origin Resource Sharing. Before allowing a page from one origin to
access a resource in another origin, WebKit sends a preflight request
to the latter server for access to the resource. WebKit includes
custom HTTP headers specified by the requesting page in the preflight
request. This can facilitate cross-site request forgery. This issue
is addressed by removing custom HTTP headers from preflight requests.
Credit: Apple.
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