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Category:   Application (Multimedia)  >   Apple iTunes Vendors:   Apple
(Apple Issues Fix for Apple iTunes) expat UTF-8 Sequence Parsing Flaw Lets Users Deny Service
SecurityTracker Alert ID:  1038111
SecurityTracker URL:
CVE Reference:   CVE-2009-3720   (Links to External Site)
Date:  Mar 23 2017
Impact:   Denial of service via local system, Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 12.6
Description:   A vulnerability was reported in expat. A user can cause denial of service conditions. Apple iTunes is affected.

A remote or local user can supply XML content with a specially crafted UTF-8 sequence that, when processed by expat, will cause expat to crash.

The specific impact depends on the application using expat.

The vulnerability resides in 'xmltok_impl.c'.

Peter Valchev reported this vulnerability.

Impact:   A user can cause expat to crash.
Solution:   Apple has issued a fix for CVE-2009-3720 for Apple iTunes (12.6).

The Apple advisory will be available at:

Vendor URL: (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (macOS/OS X), Windows (Any)

Message History:   This archive entry is a follow-up to the message listed below.
Nov 11 2009 expat UTF-8 Sequence Parsing Flaw Lets Users Deny Service

 Source Message Contents

[Original Message Not Available for Viewing]

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