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Category:   Application (Generic)  >   Ruby Vendors:   Matsumoto, Yukihiro
Ruby REXML Recursive Entity Expansion Bug Lets Remote Users Deny Service
SecurityTracker Alert ID:  1020735
SecurityTracker URL:  http://securitytracker.com/id/1020735
CVE Reference:   CVE-2008-3790   (Links to External Site)
Updated:  Sep 17 2008
Original Entry Date:  Aug 25 2008
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.8.6-p287 and prior versions, 1.8.7-p72 and prior 1.8.7 versions; 1.9.*
Description:   A vulnerability was reported in Ruby. A remote user can cause denial of service conditions.

A remote user can send specially crafted XML data to trigger a flaw in the REXML library and cause the target application to become unresponsive.

Luka Treiber and Mitja Kolsek of ACROS Security reported this vulnerability.

Impact:   A remote user can cause the target application to become unresponsive.
Solution:   The vendor has issued a patch, available at:

http://www.ruby-lang.org/security/20080823rexml/rexml-expansion-fix.rb

The vendor's advisory is available at:

http://www.ruby-lang.org/en/news/2008/08/23/dos-vulnerability-in-rexml/

Vendor URL:  www.ruby-lang.org/en/news/2008/08/23/dos-vulnerability-in-rexml/ (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Sep 5 2008 (Rails Issues Fix) Ruby REXML Recursive Entity Expansion Bug Lets Remote Users Deny Service
A fix is available for Rails.
Oct 21 2008 (Red Hat Issues Fix) Ruby REXML Recursive Entity Expansion Bug Lets Remote Users Deny Service
Red Hat has released a fix for Red Hat Enterprise Linux 4 and 5.



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