Sup before 0.13.2.1 and 0.14.x before 0.14.1.1 allows remote attackers to execute arbitrary commands via shell metacharacters in the filename of an email attachment.

References

• https://nvd.nist.gov/vuln/detail/CVE-2013-4478
• sup-heliotrope/sup@8b46cdb
• http://www.debian.org/security/2012/dsa-2805
• http://www.openwall.com/lists/oss-security/2013/10/30/2
• https://web.archive.org/web/20140524005344/http://rubyforge.org/pipermail/sup-talk/2013-October/004996.html
• https://web.archive.org/web/20140524012714/http://rubyforge.org/pipermail/sup-talk/2013-August/004993.html
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sup/CVE-2013-4478.yml
• http://rubyforge.org/pipermail/sup-talk/2013-August/004993.html
• http://rubyforge.org/pipermail/sup-talk/2013-October/004996.html
• http://www.phenoelit.org/stuff/whatsup.txt