CVE-2011-2705

The SecureRandom.random_bytes function in lib/securerandom.rb in Ruby
before 1.8.7-p352 and 1.9.x before 1.9.2-p290 relies on PID values for
initialization, which makes it easier for context-dependent attackers to
predict the result string by leveraging knowledge of random strings
obtained in an earlier process with the same PID.

Bugs

• <https://bugzilla.redhat.com/show_bug.cgi?id=722415&gt;
• <http://redmine.ruby-lang.org/issues/4579&gt;
• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=635878&gt;