A weakness has been reported in Ruby, which can be exploited by malicious, local users to bypass certain security restrictions.
The weakness is caused due to a boundary error within the filename handling on Windows systems, which can be exploited to cause a buffer overflow by e.g. assigning a specially crafted value to the "ARGF.inplace_mode" variable.
The weakness is reported in Ruby 1.9.1 patchlevel 378 on Windows systems. Other versions may also be affected.
Solution: Update to version 1.9.1-p429.
Provided and/or discovered by: The vendor credits Masaya TARUI.
Original Advisory: http://www.ruby-lang.org/en/news/2010/07/02/ruby-1-9-1-p429-is-released/
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