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TITLE:
Ruby "rb_ary_fill()" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA30924

VERIFY ADVISORY:
http://secunia.com/advisories/30924/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

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

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

The vulnerability is caused due to an integer overflow error in the
"rb_ary_fill()" function when processing overly large range
arguments. This can be exploited to cause a heap-based buffer
overflow and crash an affected application.

SOLUTION:
Fixed in the SVN repository.
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/array.c?r1=17472&r2=17756

PROVIDED AND/OR DISCOVERED BY:
Vincenzo "snagg" Iozzo, Secure Network

ORIGINAL ADVISORY:
http://securenetwork.it/ricerca/advisory/download/SN-2008-02.txt

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