CVE-2013-1856 activesupport Improper Input Validation vulnerability
Remote attackers can read arbitrary files or cause denial of service via XML external entity attacks in Ruby on Rails when using JRuby.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2013-1856?
CVE-2013-1856 is a medium-severity vulnerability in Rubyonrails Rails, published on 19 Mar 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-20
Which versions are affected by CVE-2013-1856?
4 open source packages ship an affected version, including activesupport. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
activesupport RubyGems | From 3.0.0 | 3.1.12 |
activesupport RubyGems | From 3.0.0 | 3.1.12 |
activesupport RubyGems | From 3.2.0 | 3.2.13 |
activesupport RubyGems | From 3.2.0 | 3.2.13 |
Products include Rubyonrails Rails, Rubyonrails Ruby on Rails.
How do I fix CVE-2013-1856?
Upgrade activesupport to a fixed version for your release line: 3.1.12 or 3.2.13.
Is CVE-2013-1856 being exploited?
There is no known exploitation of CVE-2013-1856 in the wild and no public exploit code.
Other vulnerabilities in Rubyonrails Rails
- CVE-2013-0277 Active Record contains deserialization of arbitrary YAML
- CVE-2017-17916 SQL injection in n/a
- CVE-2017-17917 SQL injection in n/a
- CVE-2026-33195 Rails Active Storage has possible Path Traversal in DiskService
- CVE-2024-26142 Rails possible ReDoS vulnerability in Accept header parsing in Action Dispatch
Sources
Also known as GHSA-9c2j-593q-3g82.