MEDIUM

GHSA-9c2j-593q-3g82

activesupport Improper Input Validation vulnerability

Quick fix

GHSA-9c2j-593q-3g82 — activesupport: upgrade to the fixed version with the command below.

bundle update activesupport

Details

The `ActiveSupport::XmlMini_JDOM` backend in `lib/active_support/xml_mini/jdom.rb` in the Active Support component in Ruby on Rails 3.0.x and 3.1.x before 3.1.12 and 3.2.x before 3.2.13, when JRuby is used, does not properly restrict the capabilities of the XML parser, which allows remote attackers to read arbitrary files or cause a denial of service (resource consumption) via vectors involving (1) an external DTD or (2) an external entity declaration in conjunction with an entity reference.

Are you affected?

Enter the version of the package you're using.

Affected packages

RubyGems/activesupport

Introduced in: 3.0.0Fixed in: 3.1.12

Fixbundle update activesupport

RubyGems/activesupport

Introduced in: 3.2.0Fixed in: 3.2.13

Fixbundle update activesupport

References

https://nvd.nist.gov/vuln/detail/CVE-2013-1856[ADVISORY]
https://github.com/rails/rails[PACKAGE]
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2013-1856.yml[WEB]
https://groups.google.com/group/rubyonrails-security/msg/6c2482d4ed1545e6?dmode=source&output=gplain[WEB]
https://web.archive.org/web/20130609174600/http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html[WEB]
https://web.archive.org/web/20131109010518/http://lists.apple.com/archives/security-announce/2013/Oct/msg00006.html[WEB]
http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html[WEB]
http://lists.apple.com/archives/security-announce/2013/Oct/msg00006.html[WEB]
http://support.apple.com/kb/HT5784[WEB]
http://weblog.rubyonrails.org/2013/3/18/SEC-ANN-Rails-3-2-13-3-1-12-and-2-3-18-have-been-released[WEB]