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Category:   Application (Generic)  >   expat Vendors:   libexpat.org
(Sun Issues Fix) expat UTF-8 Sequence Parsing Flaw Lets Users Deny Service
SecurityTracker Alert ID:  1023279
SecurityTracker URL:  http://securitytracker.com/id/1023279
CVE Reference:   CVE-2009-3720   (Links to External Site)
Date:  Dec 4 2009
Impact:   Denial of service via local system, Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in expat. A user can cause denial of service conditions.

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:   Sun has issued a fix.

SPARC Platform

* OpenSolaris based upon builds snv_130 or later

x86 Platform

* OpenSolaris based upon builds snv_130 or later

Sun is working on a fix for Solaris 10.

The Sun advisory is available at:

http://sunsolve.sun.com/search/document.do?assetkey=1-66-273630-1

Vendor URL:  www.libexpat.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (Solaris - SunOS)
Underlying OS Comments:  10, OpenSolaris

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



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