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Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Apple Osx Ruby | — | Upgrade macOS to the latest version | Dec 16, 2011 | Aug 12, 2008 |
| Centos_linux | — | Upgrade ruby-modeUpgrade ruby-develUpgrade rubyUpgrade ruby-libsUpgrade ruby-irbUpgrade ruby-riUpgrade ruby-docsUpgrade ruby-rdocUpgrade ruby-tcltk | Dec 1, 2016 | Aug 12, 2008 |
| Freebsd | — | Upgrade ruby+onigurumaUpgrade ruby+pthreadsUpgrade rubyUpgrade ruby+pthreads+oniguruma | Dec 10, 2025 | Aug 16, 2008 |
| Gentoo Linux | — | Upgrade dev-lang/ruby. | Oct 30, 2017 | Aug 12, 2008 |
| Oracle_linux | — | Upgrade ruby-libsUpgrade ruby-rdocUpgrade ruby-riUpgrade rubyUpgrade ruby-modeUpgrade ruby-develUpgrade ruby-irbUpgrade ruby-docsUpgrade ruby-tcltk | Oct 16, 2024 | Aug 13, 2008 |
| Suse | — | Upgrade ruby-tkUpgrade rubyUpgrade ruby-doc-html | Feb 17, 2015 | Jun 28, 2013 |
| Ubuntu | — | Upgrade libruby1.8Upgrade ruby1.8 | Nov 8, 2024 | Aug 13, 2008 |
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