Multiple format string vulnerabilities in log_subscriber.rb files in the log subscriber component in Action Mailer in Ruby on Rails 3.x before 3.2.15 allow remote attackers to cause a denial of service via a crafted e-mail address that is improperly handled during construction of a log message.
lists.opensuse.org/opensuse-updates/2013-12/msg00091.html
lists.opensuse.org/opensuse-updates/2013-12/msg00094.html
lists.opensuse.org/opensuse-updates/2014-01/msg00003.html
www.debian.org/security/2014/dsa-2887
www.debian.org/security/2014/dsa-2888
groups.google.com/forum/message/raw?msg=ruby-security-ann/yvlR1Vx44c8/elKJkpO2KVgJ