NZKoz / bigdecimal-segfault-fix

Provides a quick workaround for the segfault bug in Ruby (CVE-2009-1904)

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bigdecimal-segfault-fix / lib / bigdecimal-segfault-fix.rb
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4f9e1dfa » NZKoz 2009-06-08 Initial commit 1 # Copyright (c) 2009 Michael Koziarski <michael@koziarski.com>
2 #
3 # Permission to use, copy, modify, and/or distribute this software for any
4 # purpose with or without fee is hereby granted, provided that the above
5 # copyright notice and this permission notice appear in all copies.
6 #
7 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
10 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
12 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
13 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14
15 require 'bigdecimal'
16
17 alias BigDecimalUnsafe BigDecimal
18
19
20 # This fixes CVE-2009-1904 however it removes legitimate functionality that your
21 # application may depend on. You are *strongly* advised to upgrade your ruby
22 # rather than relying on this fix for an extended period of time.
23
24 def BigDecimal(initial, digits=0)
25 if initial.size > 255 || initial =~ /e/i
26 raise "Invalid big Decimal Value"
27 end
28 BigDecimalUnsafe(initial, digits)
29 end
30