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Category:   Application (Generic)  >   expat Vendors:   libexpat.org
expat Buffer Over-read in big2_toUtf8() Lets Users Deny Service
SecurityTracker Alert ID:  1023278
SecurityTracker URL:  http://securitytracker.com/id/1023278
CVE Reference:   CVE-2009-3560   (Links to External Site)
Date:  Dec 4 2009
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.0.1
Description:   A vulnerability was reported in expat. A remote user can cause denial of service conditions.

A remote user can create an XML document containing specially crafted UTF-8 sequences that, when processed using libexpat, will trigger a buffer over-read in the big2_toUtf8() function and crash the target application.

The vulnerability resides in 'lib/xmltok.c'.

Impact:   A remote user can cause the target application to crash.
Solution:   The vendor has issued a source code fix, available via CVS at:

http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmlparse.c?r1=1.164&r2=1.165

Vendor URL:  www.libexpat.org/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Dec 4 2009 (Sun Issues Fix) expat Buffer Over-read in big2_toUtf8() Lets Users Deny Service
Sun has issued a fix for OpenSolaris.
Dec 7 2009 (Red Hat Issues Fix) expat Buffer Over-read in big2_toUtf8() Lets Users Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 3, 4, and 5.
Mar 23 2017 (Apple Issues Fix for Apple iTunes) expat Buffer Over-read in big2_toUtf8() Lets Users Deny Service
Apple has issued a fix for Apple iTunes.



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