Posted by zzak and hone on 19 Aug 2014
We have released 1.9.2-p330, the final release of the 1.9.2 series.
This bug occurs when parsing a long string is using the URI method
decode_www_form_component. This can be reproduced by running the following
on vulnerable Rubies:
ruby -v -ruri -e'URI.decode_www_form_component "A string that causes catastrophic backtracking as it gets longer %"'
Since it was found and patched just before the release of 1.9.3, versions of Ruby 1.9.3-p0 and later are not affected; however versions of Ruby 1.9.2 older than 1.9.2-p330 are affected.
You can read the original report on the bug tracker: https://bugs.ruby-lang.org/issues/5149#note-4
SIZE: 9081661 bytes MD5: 8ba4aaf707023e76f80fc8f455c99858 SHA256: 6d3487ea8a86ad0fa78a8535078ff3c7a91ca9f99eff0a6a08e66c6e6bf2040f
SIZE: 11416473 bytes MD5: 4b9330730491f96b402adc4a561e859a SHA256: 23ef45fdaecc5d6c7b4e9e2d51b23817fc6aa8225a20f123f7fa98760e8b5ca9
SIZE: 12732739 bytes MD5: 42d261b28d1b7e500dd3bdbdbfba7fa5 SHA256: 7a04a028564de7f2ad09f26c8d57fd40fe2b0a6a0e1d9ff7205010ca6e70cea6
We encourage you to upgrade to a stable and maintained version of Ruby.