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Category:   Application (Generic)  >   Java Runtime Environment (JRE) Vendors:   Apple Computer
Java on Mac OS X HMAC Bug Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1020943
SecurityTracker URL:  http://securitytracker.com/id/1020943
CVE Reference:   CVE-2008-3637   (Links to External Site)
Date:  Sep 25 2008
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Java on Apple Mac OS X. A remote user can cause arbitrary code to be executed on the target user's system.

The code that checks Hash-based Message Authentication Code (HMAC) values uses an uninitialized variable. A remote user can create specially crafted Java applet that, when loaded by the target user, will execute arbitrary code on the target user's system. The code will run with the privileges of the target user.

Only Mac OS X is affected.

Radim Marek reported this vulnerability.

Impact:   A remote user can create an applet that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   The vendor has issued a fix.

Java for Mac OS X 10.5 Update 2:

The download file is named: "JavaForMacOSX10.5Update2.dmg"
Its SHA-1 digest is: 5b2a8de347fe68d0638bcf0ede8a71ba35adbab9

Java for Mac OS X 10.4, Release 7:

The download file is named: "JavaForMacOSX10.4Release7.dmg"
Its SHA-1 digest is: 67d17ba3e854101d890633f507b4c02e031b3a05

The update is available from the Software Update pane in System Preferences, or Apple's Software Downloads web site at:

http://www.apple.com/support/downloads/

The Apple advisories are available at:

http://support.apple.com/kb/HT3178
http://support.apple.com/kb/HT3179

Vendor URL:  support.apple.com/kb/HT3179 (Links to External Site)
Cause:   Not specified
Underlying OS:   UNIX (OS X)

Message History:   None.


 Source Message Contents

Date:  Wed, 24 Sep 2008 23:16:44 -0400
Subject:  Java


Apple reported:

Java
CVE-ID:  CVE-2008-3637
Available for:  Mac OS X v10.4.11, Mac OS X Server v10.4.11
Impact:  Visiting a maliciously crafted website may lead to arbitrary
code execution
Description:  An error checking issue leading to the use of an
uninitialized variable exists in the Hash-based Message
Authentication Code (HMAC) provider used for generating MD5 and SHA-1
hashes. Visiting a website containing a maliciously crafted Java
applet may lead to arbitrary code execution. This update addresses
the issue through improved error handling. This is an Apple-specific
issue. Credit to Radim Marek for reporting this issue.

 
 


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