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TITLE:
Ruby "rb_str_justify()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA37660

VERIFY ADVISORY:
http://secunia.com/advisories/37660/

DESCRIPTION:
A vulnerability has been reported in Ruby, which potentially can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to an error within the
"rb_str_justify()" function in string.c, which can be exploited to
cause a heap-based buffer overflow and potentially execute arbitrary
code via String#ljust, String#center, and String#rjust.

The vulnerability is reported in all Ruby 1.9.1 versions prior to
Ruby 1.9.1-p376. The Ruby 1.8 series is not affected.

SOLUTION:
Update to version 1.9.1-p376.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Emmanouel Kellinis, KPMG London.

ORIGINAL ADVISORY:
http://www.ruby-lang.org/en/news/2009/12/07/heap-overflow-in-string/

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