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TITLE:
Ruby REXML Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA31602

VERIFY ADVISORY:
http://secunia.com/advisories/31602/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Ruby 1.8.x
http://secunia.com/product/3787/

DESCRIPTION:
A vulnerability has been reported in Ruby, which can be exploited by
malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the REXML library when
processing recursively nested XML entities. This can be exploited to
cause a DoS via a specially crafted XML document.

The vulnerability is reported in versions 1.8.6-p287, 1.8.7-p72, and
1.9.x. Other versions may also be affected.

SOLUTION:
The vendor recommends including an additional script in applications
using REXML. Please see vendor advisory for more details.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Luka Treiber and Mitja Kolsek of ACROS Security.

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

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